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    Intel iGPU passthough

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    • MefosheezM Offline
      Mefosheez @bullerwins
      last edited by

      This post is deleted!
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      • MefosheezM Offline
        Mefosheez @bullerwins
        last edited by

        @bullerwins said in Intel iGPU passthough:

        @olivierlambert I tried but getting this error when turning on the VM

        INTERNAL_ERROR(xenopsd internal error: (Failure
        "Error from xenguesthelper: Populate on Demand and PCI Passthrough are mutually exclusive"))

        Not sure what it means

        EDIT: after googleing it seems that static and dynamic memory has to be the same:
        9aa61d84-dd71-4f32-9590-8cff8c365a1a-image.png

        @bullerwins thanks for this. I had to restore a VM from a backup and while it was down changed the dynamic value. This certainly saved me some time. I was positive it had to do with remapping the UID on the VM or something on the host side of it. anyways, thanks.

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        • gskgerG gskger referenced this topic on
        • S Offline
          scawtydont
          last edited by

          I followed this post and it worked for me.
          One thing to note in my testing, if I had a monitor / HDMI dummy plug hooked up the transcoding worked reliably.
          When I unplugged it I found activity would be present on the iGPU but the video in plex would play/pause constantly then eventually stop.

          olivierlambertO 1 Reply Last reply Reply Quote 0
          • olivierlambertO Offline
            olivierlambert Vates 🪐 Co-Founder CEO @scawtydont
            last edited by

            @scawtydont Thanks for keeping us posted. Dummy plug is still a thing it seems 😄

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            • V Offline
              vhaelan
              last edited by vhaelan

              I'm also trying to pass through my Intel iGPU to a VM, but running into issues. It does work on Debian, however not on Fedora Server which I'd like to use. I have tried changing to BIOS mode, even plugged in a dummy HDMI plug, but nothing helped. SELinux is disabled on Fedora to rule out any issues related to that. I even tried using XCP-NG Center which was suggested in an older post, but that didn't help either: https://xcp-ng.org/forum/topic/6211/intel-gpu-passthrough-question/3

              I also posted this on the Fedora forum with further details: https://discussion.fedoraproject.org/t/intel-igpu-in-containers/176029

              Are there any other things I could try to investigate this further?

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              • O Offline
                ovicz @vhaelan
                last edited by

                @vhaelan Hello. What's the output of rpm -qa | grep intel-gpu-firmware ?

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                • V Offline
                  vhaelan @ovicz
                  last edited by

                  @ovicz said in Intel iGPU passthough:

                  rpm -qa | grep intel-gpu-firmware

                  Hello @ovicz, I see the following: intel-gpu-firmware-20251021-1.fc43.noarch

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                  • O Offline
                    ovicz @vhaelan
                    last edited by ovicz

                    @vhaelan Is the intel graphics module loaded ?

                    lsmod | grep i915
                    i915 5373952 24
                    drm_buddy 32768 2 xe,i915
                    ttm 135168 3 drm_ttm_helper,xe,i915
                    i2c_algo_bit 20480 2 xe,i915
                    drm_display_helper 331776 2 xe,i915
                    cec 106496 3 drm_display_helper,xe,i915
                    video 81920 2 xe,i91

                    sudo dmesg | grep i915
                    [ 5.855595] i915 0000:00:08.0: [drm] Found alderlake_p/alderlake_n (device ID 46d1) integrated display version 13.00 stepping D0
                    [ 5.858477] i915 0000:00:08.0: [drm] VT-d active for gfx access
                    [ 5.858739] i915 0000:00:08.0: [drm] Using Transparent Hugepages
                    [ 5.859307] i915 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x4556
                    [ 5.859312] i915 0000:00:08.0: [drm] Failed to find VBIOS tables (VBT)
                    [ 5.860012] i915 0000:00:08.0: vgaarb: VGA decodes changed: olddecodes=io+mem,decodes=none:owns=io+mem
                    [ 5.878556] i915 0000:00:08.0: [drm] Finished loading DMC firmware i915/adlp_dmc.bin (v2.20)
                    [ 7.806109] i915 0000:00:08.0: [drm] [ENCODER:204:DDI A/PHY A] failed to retrieve link info, disabling eDP
                    [ 7.843768] i915 0000:00:08.0: [drm] GT0: GuC firmware i915/tgl_guc_70.bin version 70.49.4
                    [ 7.843776] i915 0000:00:08.0: [drm] GT0: HuC firmware i915/tgl_huc.bin version 7.9.3
                    [ 7.849282] i915 0000:00:08.0: [drm] GT0: HuC: authenticated for all workloads
                    [ 7.850868] i915 0000:00:08.0: [drm] GT0: GUC: submission enabled
                    [ 7.850874] i915 0000:00:08.0: [drm] GT0: GUC: SLPC enabled
                    [ 7.851225] i915 0000:00:08.0: [drm] GT0: GUC: RC enabled
                    [ 7.852797] i915 0000:00:08.0: [drm] Protected Xe Path (PXP) protected content support initialized
                    [ 7.854314] i915 0000:00:08.0: [drm] Registered 3 planes with drm panic
                    [ 7.854318] [drm] Initialized i915 1.6.0 for 0000:00:08.0 on minor 1

                    Also see in /etc/default/grub if there is NOMODESET in GRUB_CMDLINE_LINUX line.

                    That's from my Fedora 43 vm with passthrough enabled.

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                    • V Offline
                      vhaelan @ovicz
                      last edited by

                      @ovicz Yes, it's loaded

                      lsmod | grep i915
i915                 5373952  0
i2c_algo_bit           20480  2 xe,i915
drm_buddy              32768  2 xe,i915
video                  81920  2 xe,i915
ttm                   135168  3 drm_ttm_helper,xe,i915
drm_display_helper    331776  2 xe,i915
cec                   106496  3 drm_display_helper,xe,i915

                      dmesg starts the same as your output, the only difference is that I have GuC disabled.

                      dmesg | grep i915
[    1.609000] i915 0000:00:08.0: [drm] Found alderlake_s (device ID 4690) integrated display version 12.00 stepping C0
[    1.609986] i915 0000:00:08.0: [drm] VT-d active for gfx access
[    1.610073] i915 0000:00:08.0: [drm] Using Transparent Hugepages
[    1.611342] i915 0000:00:08.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0x4556
[    1.611345] i915 0000:00:08.0: [drm] Failed to find VBIOS tables (VBT)
[    1.612136] i915 0000:00:08.0: vgaarb: VGA decodes changed: olddecodes=io+mem,decodes=none:owns=io+mem
[    1.614455] i915 0000:00:08.0: [drm] Finished loading DMC firmware i915/adls_dmc_ver2_01.bin (v2.1)
[    3.583673] i915 0000:00:08.0: [drm] [ENCODER:261:DDI A/PHY A] failed to retrieve link info, disabling eDP
[    3.605422] i915 0000:00:08.0: [drm] GT0: GuC firmware i915/tgl_guc_70.bin version 70.49.4
[    3.605426] i915 0000:00:08.0: [drm] GT0: HuC firmware i915/tgl_huc.bin version 7.9.3
[    3.615402] i915 0000:00:08.0: [drm] GT0: HuC: authenticated for all workloads
[    3.615410] i915 0000:00:08.0: [drm] GT0: GUC: submission disabled
[    3.615414] i915 0000:00:08.0: [drm] GT0: GUC: SLPC disabled
[    3.616508] i915 0000:00:08.0: [drm] Protected Xe Path (PXP) protected content support initialized
[    3.617330] i915 0000:00:08.0: [drm] Registered 4 planes with drm panic
[    3.617354] [drm] Initialized i915 1.6.0 for 0000:00:08.0 on minor 1
[    3.627390] i915 0000:00:08.0: [drm] Cannot find any crtc or sizes
[    3.637349] i915 0000:00:08.0: [drm] Cannot find any crtc or sizes
[    3.657358] i915 0000:00:08.0: [drm] Cannot find any crtc or sizes

                      Having edited /etc/modprobe.d/i915.conf by adding options i915 enable_guc=3 enable_huc=1 fixed the GuC part as well, however I still have the same issue. Cannot find any crtc or sizes is the only part which is not in your output.

                      /etc/default/grub is clean, I don't have NOMODESET:

                      cat /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rd.lvm.lv=fedora/root rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
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                      • T Offline
                        the_spice
                        last edited by

                        I am in the same situation as @vhaelan.
                        same as in same iGPU (alderlake) passed-through, same output for those latest commands, same OS (Fedora CoreOS on latest Xcp-Ng stable).
                        Tried current avenues suggested in this thread with no progress.

                        It seems vhaelan has settled with CoreOS under Proxmox (which works!). He also mentioned it works in Debian under XCP-ng, though I haven't tested that myself.

                        I would appreciate additional suggestions for troubleshooting to take this further, in case anyone has any other ideas.

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