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    Strange issue with booting XCP-NG

    Scheduled Pinned Locked Moved Compute
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    • R Offline
      r1 XCP-ng Team
      last edited by

      @Appollonius they are still pretty same. So this means that there is no issue for system to boot (with or without GPU) but must be something to do with network config.

      Can you check if you have something in /var/log/xensource.log indicating a service failure/network start fail?

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      • ? Offline
        A Former User
        last edited by

        I dont see any failed services, though I have a question. The nvidia GPU (Quadro P400), do I have to configure Passthrough first? Maybe that could be the problem, as when I look into the host GPU's now it does not detect the GPU at all...

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        • R Offline
          r1 XCP-ng Team
          last edited by

          @Appollonius if you are using that GPU in a VM, yes, you need to enable passthrough for that pci id.

          ? 1 Reply Last reply Reply Quote 0
          • ? Offline
            A Former User @r1
            last edited by

            @r1 Well I will be in the future, but XCP-NG does not detect a GPU at all. Maybe that could be the cause of this issue? Atleast I think, as I see no GPU's listed in XCP-NG Center.

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            • R Offline
              r1 XCP-ng Team
              last edited by

              @Appollonius check # lspci -k or # lshw -c display

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              • ? Offline
                A Former User @r1
                last edited by A Former User

                @r1 said in Strange issue with booting XCP-NG:

                lshw -c display

                lshw -c display
                  *-display UNCLAIMED       
                       description: VGA compatible controller
                       product: GP107GL [Quadro P400]
                       vendor: NVIDIA Corporation
                       physical id: 0
                       bus info: pci@0000:07:00.0
                       version: a1
                       width: 64 bits
                       clock: 33MHz
                       capabilities: pm msi pciexpress vga_controller bus_master cap_list
                       configuration: latency=0
                       resources: memory:fb000000-fbffffff memory:d0000000-dfffffff memory:e0000000-e1ffffff ioport:e000(size=128) memory:c0000-dffff
                

                This is what I see, so I it does see that its there but for some reason it does not see the card in XCP-NG Center.

                Ohh wait, is that the Nvidia 'driver' problem? Which AMD cards dont have?

                In XO it does see the graphics card, so happy about that. Now I am still curious why it does not boot properly when the NVidia GPU is plugged in.

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                • R Offline
                  r1 XCP-ng Team
                  last edited by

                  @Appollonius no, pci pass through does not need device drivers to be present in dom0. Try XOA to administer.

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                  • ? Offline
                    A Former User @r1
                    last edited by

                    @r1 Well it is now even stranger than. So the host detects the GPU, but without monitor input it will just not boot... hmmm

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                    • T Offline
                      tuxen Top contributor @Guest
                      last edited by

                      @Appollonius check the BIOS for display emulation or ACPI configuration. Some boards may refuse to boot If the BIOS isn't properly configured to accept the headless mode.

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                      • ? Offline
                        A Former User @tuxen
                        last edited by

                        @tuxen Thanks for the suggestion, though when I leave out the GPU it still boots up fine. Its only when I install the GPU and dont connect it to a monitor that it will not boot properly. But then again, when I install the GPU and connect it to a monitor it will boot fine. So I think it has something to do with the display. And I dont know if this is a XCP-NG problem or a CentOS/System problem.

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                        • T Offline
                          tuxen Top contributor @Guest
                          last edited by

                          @Appollonius said in Strange issue with booting XCP-NG:

                          Its only when I install the GPU and dont connect it to a monitor that it will not boot properly.

                          Maybe because, when there's a GPU installed but no monitor attached, the motherboard POST fails at EDID probe? As stated, some boards/BIOS require an explicit configuration in order to boot without a monitor/keyboard/mouse plugged, eg.:

                          https://www.supermicro.com/support/faqs/faq.cfm?faq=11902

                          headless.png

                          ? 1 Reply Last reply Reply Quote 1
                          • ? Offline
                            A Former User @tuxen
                            last edited by A Former User

                            @tuxen Thanks for your reply, unfortunately I dont have the options ACPI - Display emulation. I use a Gigabyte Aorus X570 Pro for this server.
                            IOMMU is enabled on the bord.
                            With the Gigabyte B450 AORUS M I had zero issues, with booting in 'headless'.

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                            • ? Offline
                              A Former User
                              last edited by

                              Unfortunately this issue has not been fixed, I will be waiting if someone has another suggestion for this. Though I do have another question, my Xen Orchestra continually says that the time is out of sync with the XCP-NG host. I have looked into the NTP settings, and they seemed the same. Does anyone know what this could be?

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                              • olivierlambertO Offline
                                olivierlambert Vates 🪐 Co-Founder CEO
                                last edited by

                                Double check your NTP settings, if it tells it's not sync, it's not sync.

                                Note: XCP-ng now uses chrony, but in XO, ntpq -p will give you NTP stats

                                chrisarzuC 1 Reply Last reply Reply Quote 0
                                • ? Offline
                                  A Former User
                                  last edited by

                                  Okay so today I upgraded to XCP-NG 8.2.0 but unfortunately it did not solve the issue with XCP-NG not being able to boot without a display attached to the GPU. Also I am getting the EFI_MEMMAP issue and I don't know if this issue has a relation to the GPU.

                                  If someone has suggestions which I may try, please do so and I will test it 🙂

                                  DanpD 1 Reply Last reply Reply Quote 0
                                  • DanpD Offline
                                    Danp Pro Support Team @Guest
                                    last edited by

                                    @appollonius Are you booting on BIOS or UEFI mode? I ran across this issue earlier today that sounds exactly like what you've described.

                                    If this is the same issue, then I wonder why the "fix" hasn't made it into xcp-ng. 🙁

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                                    • olivierlambertO Offline
                                      olivierlambert Vates 🪐 Co-Founder CEO
                                      last edited by

                                      We include all fixes from XS tree into XCP-ng (or those not included are completely analyzed to be sure about it)

                                      DanpD 1 Reply Last reply Reply Quote 0
                                      • DanpD Offline
                                        Danp Pro Support Team @olivierlambert
                                        last edited by

                                        @olivierlambert Wasn't trying to imply otherwise. I was more suspicious that their "fix" never made it into the public view.

                                        Did you happen to review the issue I linked?

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                                        • stormiS Offline
                                          stormi Vates 🪐 XCP-ng Team
                                          last edited by

                                          According to the issue it was fixed in CH 8.0, so it was in XCP-ng 8.0 too.

                                          DanpD 1 Reply Last reply Reply Quote 0
                                          • DanpD Offline
                                            Danp Pro Support Team @stormi
                                            last edited by

                                            @stormi Yes... I understand that is the way it is supposed to work. 😏

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