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    Intel iGPU passthough

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    • X Offline
      xerxist @tjkreidl
      last edited by xerxist

      tjkreidl

      It was to rule out any permission problems.
      But it seems more on the iommu side of things where it goes wrong.
      I’ve just tried the same on proxmox and it works right away. (Well not right away, like you need to do some grub adjustments and load modules) Not sure 🤔 what I can do to fix it. Does the xcp ng kernel take these iommu grub settings too?

      GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt"

      and these modules

      vfio
      vfio_iommu_type1
      vfio_pci
      vfio_virqfd

      tjkreidlT 1 Reply Last reply Reply Quote 0
      • tjkreidlT Offline
        tjkreidl Ambassador @xerxist
        last edited by

        xerxist I honestly do not know, but it seems it cannot hurt to try.

        X 1 Reply Last reply Reply Quote 0
        • X Offline
          xerxist @tjkreidl
          last edited by xerxist

          Giving this another try 🙂

          tjkreidl

          I couldn't find those modules so this is probably not something in xcp-ng.

          bullerwins

          Is your vm running in EFI or BIOS?

          X bullerwinsB 2 Replies Last reply Reply Quote 0
          • X Offline
            xerxist @xerxist
            last edited by xerxist

            Got it working !!!!! 🙂

            Changed the VM from UEFI to BIOS and it started working.

            55120676-0c12-46cb-bdb3-7a986113f5c1-image.png

            Still though why would it need it be BIOS instead of UEFI

            Need to do some more testing as I also disabled something in the BIOS of the NUC11 for ASPM to so I'll bring up another VM with UEFI and test it again.

            tjkreidlT 1 Reply Last reply Reply Quote 0
            • tjkreidlT Offline
              tjkreidl Ambassador @xerxist
              last edited by

              xerxist Good news! Some boot mechanisms will work one way or the other, or in some cases, even either one of them.
              It's also important to keep the BIOS up-to-date.

              X 1 Reply Last reply Reply Quote 0
              • X Offline
                xerxist @tjkreidl
                last edited by

                tjkreidl

                Strange it works on UEFI too now.
                Only thing that changed is "ASPM off" in the BIOS of the NUC.
                Need to try that too on the NUC 13.

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                • X Offline
                  xerxist @xerxist
                  last edited by

                  NUC13 is still a no go with ASPM turned off.

                  Not sure if the kernel needs to recognize it as it doesn't give me the type like on the NUC11

                  4e3231e4-61e9-4101-abbb-ae2f90fdbd2f-image.png

                  But the NUC11 is confirmed working fine BIOS or UEFI

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                  • bullerwinsB Offline
                    bullerwins @xerxist
                    last edited by

                    xerxist in BIOS mode, i would say it was the default for my ubuntu VM

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                    • X Offline
                      xerxist @bullerwins
                      last edited by

                      bullerwins

                      Seems you would need at least Kernel > 5.15 for this to work on the NUC 12-13.
                      Not sure what got implemented/fixed there but it would need to be back ported for this to work.

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                      • bullerwinsB Offline
                        bullerwins @xerxist
                        last edited by

                        xerxist my ubuntu 22.04 install came with kernel 5.15, i have it updated regularly but it doens't update the kernel it seems. But newer fresh installs of ubuntu 22.04 install a newer kernel. I'll check out if the kernel needs to be manually updated

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                        • X Offline
                          xerxist @bullerwins
                          last edited by xerxist

                          bullerwins

                          Not in the VM itself.
                          I even went to kernel 6.6 and try it in there, all give the same issue.

                          Something on the hypervisor side in the kernel I meant. This is 4.x something with allot of backports.

                          I'll probably just wait a wile before moving full XCP-NG.
                          But its a very nice system 👍

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                          • bullerwinsB Offline
                            bullerwins @xerxist
                            last edited by

                            xerxist have you tried with the 8.3 beta of XCP-ng? I believe it's got a newer kernel maybe?

                            X 1 Reply Last reply Reply Quote 0
                            • X Offline
                              xerxist @bullerwins
                              last edited by

                              bullerwins

                              Yes I'm running 8.3 Beta

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                              • H Offline
                                hawkpro
                                last edited by

                                bullerwins xerxist

                                Is this just the mediated (gvt-g?) device passthrough, so the XCP side/server maintains video but a VM can make use of the resources as well?

                                I am very interested in this (plex, frigate type use) as a stepping stone away from Proxmox.

                                Thanks

                                F 1 Reply Last reply Reply Quote 0
                                • F Offline
                                  flakpyro @hawkpro
                                  last edited by

                                  In my testing of this, iGPU passthru works fine in Linux but in Windows the device will show an error in the device manager, disable/enabling the drive in the device manager will allow it to work, until next reboot.

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                                  • C Offline
                                    CJ
                                    last edited by

                                    bullerwins xerxist flakpyro

                                    What are you using for display output on the host since you're passing the iGPU to the VM?

                                    F X 2 Replies Last reply Reply Quote 0
                                    • F Offline
                                      flakpyro @CJ
                                      last edited by

                                      CJ Im running server grade hardware that has remote lights out management with iKVM support. Otherwise yeah you would lose access to the display output.

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                                      • X Offline
                                        xerxist @CJ
                                        last edited by

                                        CJ

                                        No output just need the Intel quick sync.

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                                        • C Offline
                                          CJ @xerxist
                                          last edited by

                                          xerxist Yes, QS for the VM but there are times when having a local display of the console comes in handy. That's why I haven't done mine.

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                                          • MefosheezM Offline
                                            Mefosheez @bullerwins
                                            last edited by

                                            This post is deleted!
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