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    GPU passthrough with Video Out

    Scheduled Pinned Locked Moved Compute
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    • M Offline
      mspencerl87
      last edited by mspencerl87

      In the past I was able to successfully pass through a GTX 970 on a Dell R720.

      I had limited time for testing but in the end it was successful I was able to get the GPU to pass through to the VM. Everything worked as expected for RDP however.

      I was never able to manage to get a video output from any of the GPU video ports HDMI display port etc..

      Is anyone aware of a way to get this to work I do want to do GPU pass through but I want the VM to act as a physical device.

      Is this a limitation of the hypervisor?
      GPU pass through works fine but no video output from graphics card?

      I could not find any instance in the forums of anyone trying to do this but I know it can be done with KVM and Windows GPU-P, Unraid etc.

      Has anyone done this successfully or know if it's possible?

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      • H Offline
        Huursa @mspencerl87
        last edited by

        @mspencerl87 You need a dummy plug or some sort of virtual monitor like usbmmidd

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        • M Offline
          mspencerl87 @Huursa
          last edited by mspencerl87

          @Huursa
          A dummy plug is what you would use in the event of using no monitor.
          I can get perfect GPU passthrough in a VM. I can't get video output to an actual monitor. Is what I'm saying.

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          • splastunovS Offline
            splastunov
            last edited by splastunov

            Did you try this tool?
            https://parsec.app/

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            • M Offline
              mspencerl87 @splastunov
              last edited by

              @splastunov
              Yes, that works, RDP works etc.
              I'm trying to get Video out on the physical display/hdmi ports.

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              • splastunovS Offline
                splastunov
                last edited by splastunov

                I do not have now host with GPU to test, but maybe you can try on/off this option in VM BIOS.

                Console options -> Console Output Device Select ->
                6e3d43e9-aa03-40d3-bf90-d868d757f19f-image.png

                And another option is to add video=efifb:off to the grub config

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                • M Offline
                  mspencerl87 @splastunov
                  last edited by

                  @splastunov
                  Never ran across this before, that's for that screenshot, and command.
                  When I'm able to I'll for sure give this another shot and check these.

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