Hi. You should try with the real ids of your gpu. The trick didn't work with my AMD GPU, perhaps it's the same for you. <div class="gmail_quote"><div dir="ltr">Le sam. 11 mars 2017 à 18:49, Patrick O'Callaghan <<a href="mailto:poc@usb.ve">poc@usb.ve</a>> a écrit : </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Sat, 2017-03-11 at 18:37 +0100, Torbjorn Jansson wrote: > > So IOMMU group 1 contains my Nvidia GPU and audio, plus the PCIe root > > bridge. > > > > $ cat /etc/modprobe.d/local.conf > > options vfio-pci ids=10de:ffffffff:ffffffff:ffffffff:00030000:ffff00ff,10de:ffffffff:ffffffff:ffffffff:00040300:ffffffff > > > > (this is just cut-and-paste from Alex's blog. I've no idea what any of > > the magic hex numbers mean except for the 10de of course). > > > > $ cat /etc/dracut.conf.d/local.conf > > add_drivers+="vfio vfio_iommu_type1 vfio_pci vfio_virqfd" > > > > My boot line is: > > > > GRUB_CMDLINE_LINUX="rd.blacklist=nvidia rd.blacklist=nouveau intel_iommu=on iommu=pt rd.driver.pre=vfio-pci vconsole.font=latarcyrheb-sun16 $([ -x /usr/sbin/rhcrashkernel-param ] && /usr/sbin/rhcrashkernel-param || :) rhgb quiet resume=U > > UID=1431e6d2-531e-46cd-8633-1cf878c6b2a1" audit=0 > > > > (Note that I have the Nvidia proprietary driver so need to mask that as > > well as Nouveau). > > > > My monitor is connected to HDMI on the internal GPU and DVI on the > > Nvidia card. > > > > However on rebooting I always have the Nvidia module loaded, and don't > > have vfio: > > $ lsmod|egrep -i nvidia\|vfio > > nvidia_drm 53248 1 > > nvidia_modeset 806912 8 nvidia_drm > > nvidia 12267520 175 nvidia_modeset > > drm_kms_helper 151552 1 nvidia_drm > > drm 339968 4 nvidia_drm,drm_kms_helper > > > > And of course, the monitor is only active on the DVI port and not the HDMI. > > > > Any suggestions on what I might try? > > > > poc > > > > looks ok, did you remember to regenerate grub config? > if not, then your changes in /etc/default/grub did not take effect. > > if i'm not mistaken you run: grub2-mkconfig -o grub.cfg > check it first before replacing old file under /boot and make a backup > of it first in case you screw up. Yes, I did that (on Fedora it's: grub2-mkconfig -o /etc/grub2.cfg). I do have a backup. If it looks right, there must be something else I'm missing. I've wondered if having the Nvidia drivers installed could affect things, though I don't see why it should be necessary as long as I can stop them being loaded. I keep them updated using akmod but even uninstalling akmod and the kmod-nvidia rpm it generates doesn't make any difference, i.e. somehow the modules are still there, which is weird in in itself. Maybe that's the root of the problem. poc _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com" class="gmail_msg" target="_blank">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" class="gmail_msg" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div>