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<p>Did you have any issues with efifb or some other driver grabbing
the gard before vfio-pci? What are your IOMMU groups like, which
chard is your boot_vga, what script or method do you use to get
vfio-pci to bind with your card, what's your kernel command line
and what modules are included in your initramfs?</p>
<p>I've struggled with getting my primary GPU to work correctly for
a passthrough like this, and I ended up switching it up with the
secondary because I simply couldn't get it to work properly (I'd
keep getting something about "<code>Invalid ROM contents</code>")
and I couldn't see my boot logs until the host driver finished
loading. It's really inconvenient now becuase my motherboard is
designed so that having a full-size GPU in the second PCIe slot
blocks 4 SATA ports out of 6, so I need to have L-shaped cables in
a bunch of places to make everything work properly.</p>
<p>I'd really like to know what the solution to this problem is.</p>
<p>- Nicolas<br>
</p>
<br>
<div class="moz-cite-prefix">On 2016-05-17 12:36, Zaki Saad wrote:<br>
</div>
<blockquote
cite="mid:CAMe=hiJ7rjodaK2Ogwy_APm2N49YC0DvL7E7U1ay+hk0bGcP2g@mail.gmail.com"
type="cite">
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<div><span style="line-height:1.5">Regarding</span><br>
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<blockquote
cite="https://www.redhat.com/archives/vfio-users/2016-May/msg00094.html"
type="cite" style="font-family:'times new
roman';font-size:medium;line-height:normal">
<div dir="ltr">
<div dir="ltr">3.) How to passthrough host
primary GPU (if possible, :) )<br>
</div>
</div>
</blockquote>
<span style="font-family:'times new
roman';font-size:medium;line-height:normal">I've
stuggled with that issue myself a lot until I gave
up and ended up switching my guest GPU to a
secondary slot. I'm still not even sure what
counts as "host primary", is it the boot_vga?</span></font></td>
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<div><br>
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<div>from <a moz-do-not-send="true"
href="https://www.redhat.com/archives/vfio-users/2016-May/msg00094.html">https://www.redhat.com/archives/vfio-users/2016-May/msg00094.html</a>, </div>
<div><br>
</div>
<div>In my setup, my primary GPU is passed to a VM and my
'secondary' GPU is used for the host.</div>
<div><br>
</div>
<div>I use pci-stub to capture my primary GPU, and Xorg is given
to my secondary GPU through the use of BusID in xorg.conf.</div>
<div><br>
</div>
<div>My primary GPU is AMD (r9 390), and my secondary (host) GPU
is nVidia (GT 730), running proprietary drivers.</div>
<div><br>
</div>
<div>I am able to provide more details on this matter, if
preferred. </div>
</div>
<br>
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</blockquote>
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