libvirt.libvirtError: internal error: libxenlight failed to attach pci device 0000:04:00.0

User Support General
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I created a windows VM, did all the steps in the gaming HVM guide, and then try to passthrough the GPU, and this error comes up – I’ve also tried this in a non-manual way, using ‘qubes-install-windows-qube’, and it still gave the same error. I looked it up and I only found one result that fits what I’m running into and it was pretty far from my current setup. What should I try to do? I really miss gaming, it’s been so long.

And to state it so you guys know, I do have secondary gpu, and I do have another monitor attached to that second GPU, of which no other displays are attached to.

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This is far from enough to give a tip. What device 04 is at all?

But my wild guess based on what you wrote is that you didn’t pass GPU’s audio device to a HVM as well.

Be prepared to give a lot more info in order to be helped, anyway (exact steps, commands, configuration, etc…).

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my bad - 04 is the secondary gpu to passthrough. that said, i followed the guide step by step.

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Ah, ok now. Please let us know when you take steps you’ve been suggested for.

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will do. here’s the guide i followed: Create a Gaming HVM

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If after attaching GPU’s audio device to HVM it still doesn’t work, next step would be to do the strict reset (there’s a button for it, and select both devices in a window that button opens - sorry to be trivial, I don’t know anything about the level of your skills).

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np, i don’t really have much experience with qubes. I’ll try this when i wake up in the morning… it’s 6 am for me, having a restless night with cptsd.

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Alright. So where do I reset them? Also I think part of the issue may be I didn’t pci block the audio device (was I supposed to???) – that may be part of it, after sleeping on it.

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Your GPU can consist of several PCI devices and you need to passthrough all of them:

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I do know all of the PCI devices that my GPU has, I just didn’t pass all of them through – just the GPU itself. My bad. Let me go edit my grub and see if it makes it work. Ty.

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added the devices to the hvm, and now it’s giving the error: “qrexec-daemon startup failed: 2023-12-29 15:12:41.637 qrexec-daem,on[8642]: qrexec-daemon.c:144:sigchld_parent_handler: Connection to the VM failed” whenever I try to boot up the Windows HVM

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And it says this message -immediately- after booting up, then closes down. I did try the button you were talking about, the strict reset button – and I tried it on both pci devices, and still nothing.

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though I will say – when it does show for the 1 second it’s up, it says “guest not initialized” – looking into this now

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going to try to use the qvm-create-windows-qube again – this time manually installing the windows tools

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Nope. Still doesn’t work, even with the qvm-create-windows-qube setup.

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Set the qube memory to 2 GB and try to boot for a test.

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the qube boots fine without the pci devices. just, when I add them, it says that connection message

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Try to boot qube with PCI devices and memory set to 2 GB.

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I’ll try that tomorrow - ty

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If it runs with let’s say 1848MB RAM, after that you want to patch xen.xml and related: