GPU passthrough extremely bad performance, USB controller fails to load driver

neowutran · September 18, 2024, 7:05pm

Hi,
I had the same issue in the past and used some workaround that worked for me at the time.
However I do not have a AMD gpu anymore, so can’t test or be sure.
Some references that may help you:

github.com/QubesOS/qubes-issues

MSI problems with `amdgpu` driver on recent kernels

opened 05:57PM - 04 Jan 23 UTC

neowutran

T: bug C: kernel C: Xen P: default hardware support needs diagnosis C: power management affects-4.1 affects-4.2

### Qubes OS release 4.1 ### Brief summary On recent linux kernel (5.6+), t…he driver "amdgpu" start using MSI to do power management at runtime. In later kernel version (5.10+) also seems MSI seems to be used to do other things related link: https://gitlab.freedesktop.org/drm/amd/-/issues/2327 Can this pull request be related to this issue ? https://github.com/QubesOS/qubes-vmm-xen/pull/143 ### Steps to reproduce - Do a GPU passthrough to a VM (AMD GPU) - With kernel <5.6 it will work (if the GPU is supported by this kernel version) - With kernel >5.6 it won't work