<div dir="ltr">Thanks for the encouragement guys. I think I'm going to try some scrounge for some other hardware just to make sure my GPU isn't the problem. The only other cards I have are AMD which besides rebooting actually work solidly.</div><br><div class="gmail_quote"><div dir="ltr">On Tue, Jan 26, 2016 at 11:36 AM Ruben Felgenhauer <<a href="mailto:4felgenh@informatik.uni-hamburg.de">4felgenh@informatik.uni-hamburg.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    Hi, Ryan!<br>
    <br>
    Installing an older Kernel is probably easier than you might think.<br>
    On Ubuntu you should be able to find out which kernels are in the
    repos with apt-cache,<br>
    but I sadly don't know the params, so maybe take a look at the
    manpage.<br>
    And afterwards you should be able to install a specific version with
    'apt-get install packagename=version'<br>
    <br>
    On Debian there is simply <a href="http://snapshot.debian.org/package/linux/" target="_blank">http://snapshot.debian.org/package/linux/</a>
    which is how I downgraded from 4.3 to 4.1 on my Debian testing.<br>
    You can just download the deb files there and install them with
    dpkg.<br>
    Maybe if you search for a testing system that is similar to Ubuntu,
    you could give that a try.<br>
    <br>
    But keep in mind that this doesn't uninstall the old kernel, so you
    will have a fallback.<br>
    You might need to select the right kernel at GRUB though.<br>
    <br>
    Best regards,<br>
    Ruben</div><div text="#000000" bgcolor="#FFFFFF"><br>
    <br>
    <div>Am 26.01.2016 um 18:11 schrieb Will
      Marler:<br>
    </div>
    <blockquote type="cite">
      <div dir="ltr">Well, you run Linux and you're experimenting with
        VGA passthrough ... you're resourceful! What about picking up a
        <a href="http://www.amazon.com/Samsung-16GB-Solid-State-Drive/dp/B003YMJPE8/ref=sr_1_3?ie=UTF8&qid=1453827934&sr=8-3&keywords=16GB+SSD" target="_blank">16GB
          SSD for $15</a> and installing Arch (or Fedora, or Gentoo...
        whatever suits) side by side with Ubuntu? Presumably your VM can
        be launched either way without any configuration changes ...
        when you get tired/frustrated of the Arch/Fedora/Gentoo way you
        reboot back. If it works, you've found the answer, if it
        doesn't, you've improved your Linux-fu for not much (monetary)
        cost.
        <div><br>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Tue, Jan 26, 2016 at 10:03 AM, Ryan
          Flagler <span dir="ltr"><<a href="mailto:ryan.flagler@gmail.com" target="_blank">ryan.flagler@gmail.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div dir="ltr">Yea, that's just a major jump. Wish I had a
              dedicated test system to try more things. ;)</div>
            <div>
              <div><br>
                <div class="gmail_quote">
                  <div dir="ltr">On Tue, Jan 26, 2016 at 10:34 AM Will
                    Marler <<a href="mailto:will@wmarler.com" target="_blank">will@wmarler.com</a>>
                    wrote:<br>
                  </div>
                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                    <div dir="ltr">Next up would be Kernel, it sounds
                      like...</div>
                    <div class="gmail_extra"><br>
                      <div class="gmail_quote">On Tue, Jan 26, 2016 at
                        8:27 AM, Ryan Flagler <span dir="ltr"><<a href="mailto:ryan.flagler@gmail.com" target="_blank"><a href="mailto:ryan.flagler@gmail.com" target="_blank">ryan.flagler@gmail.com</a></a>></span>
                        wrote:<br>
                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                          <div dir="ltr">Thanks for this info Will.
                            Tried matching your qemu/libvirt versions
                            and I still get the driver crashes. I'm not
                            sure what else to try.</div>
                          <div>
                            <div><br>
                              <div class="gmail_quote">
                                <div dir="ltr">On Mon, Jan 25, 2016 at
                                  9:20 PM Will Marler <<a href="mailto:will@wmarler.com" target="_blank"><a href="mailto:will@wmarler.com" target="_blank">will@wmarler.com</a></a>>
                                  wrote:<br>
                                </div>
                                <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                  <div dir="ltr">Hey Ryan,
                                    <div><br>
                                    </div>
                                    <div>Here are the answers to your
                                      questions:</div>
                                    <div><br>
                                    </div>
                                    <div><span style="font-family:monospace"><span style="color:rgb(178,178,178)">20:06:27
                                        </span><span style="color:rgb(24,178,24)">will</span><span style="color:rgb(0,0,0)"> </span><span style="font-weight:bold;color:rgb(84,84,255)">~</span><span style="color:rgb(0,0,0)">%
                                          uname -a
                                        </span><br>
                                        Linux haze 4.3.3-2-ARCH #1 SMP
                                        PREEMPT Wed Dec 23 20:09:18 CET
                                        2015 x86_64 GNU/Linux<br>
                                      </span></div>
                                    <div><span style="font-family:monospace"><span style="color:rgb(178,178,178)">20:07:01 </span><span style="color:rgb(24,178,24)">will</span><span style="color:rgb(0,0,0)"> </span><span style="font-weight:bold;color:rgb(84,84,255)">~</span><span style="color:rgb(0,0,0)">%
                                          pacman -Q | egrep
                                          '^linux|^libvirt|^qemu'
                                        </span><br>
                                        libvirt 1.3.1-1
                                        <br>
                                        libvirt-glib 0.2.2-1
                                        <br>
                                        libvirt-python 1.3.1-1
                                        <br>
                                        linux 4.3.3-2
                                        <br>
                                        linux-api-headers 4.1.4-1
                                        <br>
                                        linux-firmware
                                        20151207.bbe4917-1
                                        <br>
                                        qemu 2.4.1-2<br>
                                        <br>
                                      </span></div>
                                    <div>And here is the pastebin to my
                                      XML file: <a href="http://pastebin.com/nB3DPkEr" target="_blank"><a href="http://pastebin.com/nB3DPkEr" target="_blank">http://pastebin.com/nB3DPkEr</a></a><br>
                                    </div>
                                    <div><br>
                                    </div>
                                    <div>As far as the guest drivers are
                                      concerned, they're the "GeForce
                                      Game Ready Driver" version 361.43.</div>
                                    <div><br>
                                    </div>
                                    <div>HTH!</div>
                                  </div>
                                  <div class="gmail_extra"><br>
                                    <div class="gmail_quote">On Mon, Jan
                                      25, 2016 at 10:12 AM, Ryan Flagler
                                      <span dir="ltr"><<a href="mailto:ryan.flagler@gmail.com" target="_blank"><a href="mailto:ryan.flagler@gmail.com" target="_blank">ryan.flagler@gmail.com</a></a>></span>
                                      wrote:<br>
                                      <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                        <div dir="ltr">Thanks Will. Here
                                          is my info with the guest that
                                          crashes.
                                          <div><br>
                                          </div>
                                          <div>
                                            <div>Host OS Info</div>
                                            <div> ubuntu - 14.04.03</div>
                                            <div> kernel - 3.19.0-47</div>
                                            <div><br>
                                            </div>
                                            <div>virsh version</div>
                                            <div> Compiled against
                                              library: libvirt 1.2.18</div>
                                            <div> Using library: libvirt
                                              1.2.18</div>
                                            <div> Using API: QEMU 1.2.18</div>
                                            <div> Running hypervisor:
                                              QEMU 2.5.0</div>
                                            <div><br>
                                            </div>
                                            <div>patches</div>
                                            <div> I did not manually
                                              apply any patches to Qemu.
                                              Built directly from
                                              source.</div>
                                            <div><br>
                                            </div>
                                            <div>Guest Info</div>
                                            <div> Windows 10</div>
                                            <div> nVidia Graphics Driver
                                              361.43</div>
                                            <div><br>
                                            </div>
                                            <div>Guest Event Viewer
                                              Entry On Driver Crash</div>
                                            <div> Source - nvlddmkm</div>
                                            <div> Event ID - 14</div>
                                            <div> Info - \Device\Video3
                                               CMDre 00000004 0000011c
                                              bad0011f 00000000 00d0011f</div>
                                          </div>
                                          <div><br>
                                          </div>
                                          <div>Guest XML - Attached</div>
                                          <div>
                                            <div>
                                              <div><br>
                                              </div>
                                              <br>
                                              <div class="gmail_quote">
                                                <div dir="ltr">On Mon,
                                                  Jan 25, 2016 at 10:18
                                                  AM Will Marler <<a href="mailto:will@wmarler.com" target="_blank"><a href="mailto:will@wmarler.com" target="_blank">will@wmarler.com</a></a>>
                                                  wrote:<br>
                                                </div>
                                                <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">On
                                                        Mon, Jan 25,
                                                        2016 at 9:07 AM,
                                                        Ryan Flagler <span dir="ltr"><<a href="mailto:ryan.flagler@gmail.com" target="_blank"><a href="mailto:ryan.flagler@gmail.com" target="_blank">ryan.flagler@gmail.com</a></a>></span>
                                                        wrote:<br>
                                                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <p dir="ltr">Will,
                                                          could you tell
                                                          us the
                                                          following?</p>
                                                          <p dir="ltr">What
                                                          Linux
                                                          distribution
                                                          on host?<br>
                                                          </p>
                                                        </blockquote>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <div>Arch </div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <p dir="ltr">
                                                          What kernel
                                                          are you using
                                                          on host?<br>
                                                          What libvirt
                                                          version on
                                                          host?<br>
                                                          What qemu
                                                          version on
                                                          host?<br>
                                                          </p>
                                                        </blockquote>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <div>Will have
                                                          to check when
                                                          I'm home from
                                                          work & the
                                                          kids are
                                                          asnooze, but
                                                          it's
                                                          whatever's
                                                          latest (and
                                                          I'm not using
                                                          the
                                                          linux-vfio-lts
                                                          kernel) </div>
                                                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <p dir="ltr">
                                                          What OS on
                                                          guest?<br>
                                                          </p>
                                                        </blockquote>
                                                        <div>Windows 10.</div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <p dir="ltr">
                                                          What nvidia
                                                          graphics
                                                          driver version
                                                          on guest?</p>
                                                        </blockquote>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <div>Again, I'll
                                                          have to check.
                                                          But the latest
                                                          or nearly
                                                          latest. </div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <p dir="ltr">My
                                                          machines gpu
                                                          driver crashes
                                                          constantly and
                                                          I'm trying to
                                                          narrow down
                                                          why. Thanks!</p>
                                                        </blockquote>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <div>How
                                                          frustrating :
                                                          (. I'll also
                                                          get a pastebin
                                                          of my XML for
                                                          you, in case
                                                          that will
                                                          help. I've
                                                          been running
                                                          "stable" since
                                                          mid 2015. I
                                                          use the quotes
                                                          because some
                                                          things tripped
                                                          me up (guest
                                                          machine can't
                                                          "sleep," can
                                                          only power on
                                                          & power
                                                          off; when host
                                                          machine goes
                                                          to sleep with
                                                          guest running,
                                                          on host
                                                          wake-up the
                                                          guest is
                                                          non-responsive
                                                          and 100%
                                                          CPU). </div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <div><br>
                                                        </div>
                                                        <div>Will</div>
                                                      </div>
                                                    </div>
                                                  </div>
                                                  <div dir="ltr">
                                                    <div class="gmail_extra">
                                                      <div class="gmail_quote">
                                                        <div> </div>
                                                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <div>
                                                          <div>
                                                          <br>
                                                          <div class="gmail_quote">
                                                          <div dir="ltr">On
                                                          Mon, Jan 25,
                                                          2016, 10:02
                                                          AM Will Marler
                                                          <<a href="mailto:will@wmarler.com" target="_blank"><a href="mailto:will@wmarler.com" target="_blank">will@wmarler.com</a></a>>
                                                          wrote:<br>
                                                          </div>
                                                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <div dir="ltr">This
                                                          is discussed
                                                          in <a href="http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part-4-our-first.html" target="_blank"><a href="http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part-4-our-first.html" target="_blank">http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part-4-our-first.html</a></a>.
                                                          You have to do
                                                          more than
                                                          <kvm><hidden
state='on'/></kvm>:<br>
                                                          <div><br>
                                                          </div>
                                                          <div>"The
                                                          GeForce card
                                                          is nearly as
                                                          easy, but we
                                                          first need to
                                                          work around
                                                          some of the
                                                          roadblocks
                                                          Nvidia has put
                                                          in place to
                                                          prevent you
                                                          from using the
                                                          hardware
                                                          you've
                                                          purchased in
                                                          the way that
                                                          you desire
                                                          (and by my
                                                          reading
                                                          conforms to
                                                          the EULA for
                                                          their
                                                          software, but
                                                          IANAL).  For
                                                          this step we
                                                          again need to
                                                          run virsh edit
                                                          on the VM. 
                                                          Within the
                                                          <features>
                                                          section,
                                                          remove
                                                          everything
                                                          between the
                                                          <hyperv>
                                                          tags,
                                                          including the
                                                          tags
                                                          themselves. 
                                                          In their place
                                                          add the
                                                          following
                                                          tags:</div>
                                                          </div>
                                                          <div dir="ltr">
                                                          <div><br>
                                                          </div>
                                                          <div>   
                                                          <kvm></div>
                                                          <div>     
                                                          <hidden
                                                          state='on'/></div>
                                                          <div>   
                                                          </kvm></div>
                                                          <div><br>
                                                          </div>
                                                          </div>
                                                          <div dir="ltr">
                                                          <div>Additionally,
                                                          within the
                                                          <clock>
                                                          tag, find the
                                                          timer named
                                                          hypervclock,
                                                          remove the
                                                          line
                                                          containing
                                                          this tag
                                                          completely. 
                                                          Save and exit
                                                          the edit
                                                          session."</div>
                                                          <div><br>
                                                          </div>
                                                          <div>I can
                                                          confirm it
                                                          works, I've
                                                          been getting a
                                                          lot of mileage
                                                          from my
                                                          passed-through
                                                          750Ti lately
                                                          since getting
                                                          a Steam Link
                                                          :-D.</div>
                                                          </div>
                                                          <div class="gmail_extra"><br>
                                                          <div class="gmail_quote">On
                                                          Sun, Jan 24,
                                                          2016 at 7:32
                                                          AM, Ruben
                                                          Felgenhauer <span dir="ltr"><<a href="mailto:4felgenh@informatik.uni-hamburg.de" target="_blank"><a href="mailto:4felgenh@informatik.uni-hamburg.de" target="_blank">4felgenh@informatik.uni-hamburg.de</a></a>></span> wrote:<br>
                                                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <div text="#000000" bgcolor="#FFFFFF"> Hi,<br>
                                                          <br>
                                                          finally I had
                                                          time to this
                                                          again. I tried
                                                          out
                                                          virt-manager
                                                          and after a
                                                          bit of playing
                                                          around with
                                                          it, it
                                                          /somewhat/
                                                          worked:<br>
                                                          <br>
                                                          The machine is
                                                          at least
                                                          booting. I
                                                          still have a
                                                          standard vga
                                                          card enabled
                                                          in the
                                                          virt-manager
                                                          config window.<br>
                                                          After the
                                                          machine has
                                                          booted, I can
                                                          see that the
                                                          device gets
                                                          recognized as
                                                          750ti.<br>
                                                          However, the
                                                          gpu doesn't
                                                          get used,
                                                          because of
                                                          'Code 43'.<br>
                                                          Code 43 is a
                                                          generic error,
                                                          so any idea
                                                          what it could
                                                          mean in this
                                                          case?<br>
                                                          <br>
                                                          Of course I
                                                          added the
                                                          <kvm><hidden
                                                          state='on'/></kvm>
                                                          lines at the
                                                          associated
                                                          position.<br>
                                                          <br>
                                                          Best regards,<br>
                                                          Ruben
                                                          <div>
                                                          <div><br>
                                                          <br>
                                                          <div>Am
                                                          18.01.2016 um
                                                          22:27 schrieb
                                                          Will Marler:<br>
                                                          </div>
                                                          <blockquote type="cite">
                                                          <div dir="ltr">I'm
                                                          not sure what
                                                          correct
                                                          command-line
                                                          syntax is.
                                                          Have you tried
                                                          using libvirt
                                                          and
                                                          VirtManager to
                                                          handle your VM
                                                          rather than
                                                          command line,
                                                          and modifying
                                                          the XML rather
                                                          than the
                                                          command line?
                                                          I think that's
                                                          generally the
                                                          preferred
                                                          method these
                                                          days (it's
                                                          certainly
                                                          easier from my
                                                          point of view,
                                                          and the way I
                                                          got my 750 Ti
                                                          to pass
                                                          through).</div>
                                                          <div class="gmail_extra"><br>
                                                          <div class="gmail_quote">On
                                                          Mon, Jan 18,
                                                          2016 at 11:04
                                                          AM, Ruben
                                                          Felgenhauer <span dir="ltr"><<a href="mailto:4felgenh@informatik.uni-hamburg.de" target="_blank"><a href="mailto:4felgenh@informatik.uni-hamburg.de" target="_blank">4felgenh@informatik.uni-hamburg.de</a></a>></span> wrote:<br>
                                                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <div text="#000000" bgcolor="#FFFFFF"> Hi, Alex!<br>
                                                          <br>
                                                          Thanks for
                                                          your reply!<br>
                                                          My GPU indeed
                                                          has a seperate
                                                          audio device
                                                          located at
                                                          01:00.1.<br>
                                                          <br>
                                                          However, just
                                                          adding -device
                                                          vfio-pci,host=01:00.1
                                                          doesn't seem
                                                          to do the
                                                          trick.<br>
                                                          Of course the
                                                          corresponding
                                                          device is
                                                          already
                                                          blacklisted
                                                          and bound to
                                                          vfio.<br>
                                                          <br>
                                                          The Debian
                                                          Wiki entry
                                                          about VGA
                                                          passthrough (<a href="https://wiki.debian.org/VGAPassthrough" target="_blank"><a href="https://wiki.debian.org/VGAPassthrough" target="_blank">https://wiki.debian.org/VGAPassthrough</a></a>)
                                                          mentions QEMU
                                                          arguments like
                                                          "-device
                                                          vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on,romfile=...



                                                          -device
                                                          vfio-pci,host=01:00.1,bus=pcie.0"
                                                          which seems to
                                                          address GPUs
                                                          with audio
                                                          devices, but
                                                          if I try to do
                                                          something
                                                          similar, the
                                                          buses 'root'
                                                          and 'pcie'
                                                          couldn't be
                                                          found. Maybe I
                                                          missed
                                                          something very
                                                          important?<br>
                                                          <br>
                                                          On the same
                                                          article, it
                                                          says that the
                                                          "HDMI
                                                          soundcard
                                                          [...] needs to
                                                          be unbound
                                                          from its
                                                          driver":<br>
                                                          # echo
                                                          '0000:01:00.1'
                                                          | sudo tee
                                                          /sys/bus/pci/devices/0000:01:00.1/driver/unbind<br>
                                                          I figured the
                                                          vfio-bind
                                                          script from
                                                          the Arch Linux
                                                          Forum thread (<a href="https://bbs.archlinux.org/viewtopic.php?id=162768" target="_blank"><a href="https://bbs.archlinux.org/viewtopic.php?id=162768" target="_blank">https://bbs.archlinux.org/viewtopic.php?id=162768</a></a>)
                                                          would do
                                                          exactly this
                                                          thing, so I
                                                          didn't
                                                          explicitly do
                                                          so for the
                                                          audio device.
                                                          Is that okay?<br>
                                                          <br>
                                                          Best regards,<br>
                                                          Ruben
                                                          <div>
                                                          <div><br>
                                                          <br>
                                                          <div>Am
                                                          18.01.2016 um
                                                          08:31 schrieb
                                                          Alexander
                                                          Petrenz:<br>
                                                          </div>
                                                          <blockquote type="cite">
                                                          <div dir="ltr">Hi
                                                          Ruben,
                                                          <div><br>
                                                          </div>
                                                          <div>I guess
                                                          your 750ti
                                                          also has some
                                                          audio device.
                                                          You should
                                                          pass through
                                                          this too. It
                                                          should be
                                                          something like
                                                          01:00.1. There
                                                          are many
                                                          command line
                                                          examples you
                                                          can find about
                                                          that.</div>
                                                          <div>Also I´m
                                                          not quite
                                                          sure, if you
                                                          should remove
                                                          the x-vga=on.</div>
                                                          <div><br>
                                                          </div>
                                                          <div>Regards</div>
                                                          <div>Alex</div>
                                                          </div>
                                                          <div class="gmail_extra"><br>
                                                          <div class="gmail_quote">On
                                                          Sun, Jan 17,
                                                          2016 at 11:12
                                                          PM, Ruben
                                                          Felgenhauer <span dir="ltr"><<a href="mailto:4felgenh@informatik.uni-hamburg.de" target="_blank"><a href="mailto:4felgenh@informatik.uni-hamburg.de" target="_blank">4felgenh@informatik.uni-hamburg.de</a></a>></span> wrote:<br>
                                                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
                                                          <br>
                                                          I am trying to
                                                          pass my nVidia
                                                          GTX 750ti to
                                                          my QEMU guest.<br>
                                                          <br>
                                                          Problem is:
                                                          After the QEMU
                                                          monitor pops
                                                          up, nothing
                                                          happens. The
                                                          GPU's output
                                                          is dead, and
                                                          the vm won't
                                                          be accessible
                                                          via SSH
                                                          anymore, so
                                                          it's very
                                                          likely that
                                                          the VM isn't
                                                          booting up at
                                                          all. Also,
                                                          there are no
                                                          error messages
                                                          from QEMU on
                                                          the console
                                                          whatsoever
                                                          which makes
                                                          debugging it
                                                          especially
                                                          hard.<br>
                                                          <br>
                                                          This is how I
                                                          start the vm
                                                          with normal
                                                          vga emulation:<br>
                                                          qemu-system-x86_64
                                                          -hda vm.ovl
                                                          -boot c
                                                          -enable-kvm -m
                                                          1024 -cpu
                                                          host,kvm=off
                                                          -smp
                                                          cores=4,threads=2
                                                          -redir
                                                          tcp:5022::22<br>
                                                          Everything
                                                          runs fine in
                                                          this case. To
                                                          do the
                                                          passthrough, I
                                                          add this:<br>
                                                          -device
                                                          vfio-pci,host=01:00.0,multifunction=on,x-vga=on
                                                          -vga none<br>
                                                          This brings
                                                          said problems
                                                          with it. I
                                                          also tried out
                                                          multiple
                                                          different
                                                          combinations
                                                          of -device's
                                                          arguments or
                                                          even adding a
                                                          romfile for
                                                          the GPU, but
                                                          none of these
                                                          steps changed
                                                          anything at
                                                          all.<br>
                                                          <br>
                                                          Obviously, I
                                                          am using a
                                                          BIOS
                                                          installation
                                                          and I'm
                                                          well-aware
                                                          with this bug:
                                                          <a href="https://bugzilla.kernel.org/show_bug.cgi?id=107561" target="_blank"><a href="https://bugzilla.kernel.org/show_bug.cgi?id=107561" target="_blank">https://bugzilla.kernel.org/show_bug.cgi?id=107561</a></a>,
                                                          but neither
                                                          using less RAM
                                                          (as you can
                                                          see I am using
                                                          1GB now) nor
                                                          switching to
                                                          an older
                                                          Kernel changed
                                                          anything about
                                                          the problem. I
                                                          have tried
                                                          Kernel 4.1.0
                                                          and 4.3.0.<br>
                                                          <br>
                                                          Host is Debian
                                                          testing with
                                                          QEMU 2.5.0.<br>
                                                          I tried both
                                                          Debian and
                                                          Windows 7 as a
                                                          guest, but
                                                          both are
                                                          showing
                                                          exactly the
                                                          same
                                                          behaviour.<br>
                                                          Mainboard is
                                                          an ASUS
                                                          Z87-PLUS. The
                                                          750ti is
                                                          produced by
                                                          ASUS aswell.<br>
                                                          <br>
                                                          Any idea how I
                                                          could get
                                                          passthrough
                                                          running?<br>
                                                          <br>
_______________________________________________<br>
                                                          vfio-users
                                                          mailing list<br>
                                                          <a href="mailto:vfio-users@redhat.com" target="_blank"><a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a></a><br>
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                                                          </blockquote>
                                                          </div>
                                                          <br>
                                                          </div>
                                                          </blockquote>
                                                          <br>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          <br>
_______________________________________________<br>
                                                          vfio-users
                                                          mailing list<br>
                                                          <a href="mailto:vfio-users@redhat.com" target="_blank"><a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a></a><br>
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                                                          <br>
                                                          </blockquote>
                                                          </div>
                                                          <br>
                                                          </div>
                                                          </blockquote>
                                                          <br>
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                                                          </blockquote>
                                                          </div>
                                                          <br>
                                                          </div>
_______________________________________________<br>
                                                          vfio-users
                                                          mailing list<br>
                                                          <a href="mailto:vfio-users@redhat.com" target="_blank"><a href="mailto:vfio-users@redhat.com" target="_blank">vfio-users@redhat.com</a></a><br>
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                                                          </blockquote>
                                                          </div>
                                                          </div>
                                                          </div>
                                                        </blockquote>
                                                      </div>
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                                </blockquote>
                              </div>
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                        </blockquote>
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    <br>
  </div></blockquote></div>