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[GPU Passthrough]GPU (Polaris) not reinitialized with Linux VM (Reset bug)

Submitted by Maxime

Assigned to Default DRI bug account

Link to original bug (#106111)

Description

Created attachment 138887
xorg.conf

Hi,

My Setup :

  • AMD Ryzen 1600
  • 16 Gb Memory RAM
  • Host (Debian Stable, kernel 4.16.2) : AMD Rx560 4Gb
  • Guest (Windows 10 / Archlinux Kernel 4.15.x-4.16.x) : AMD Rx580 - 8Gb

Years ago there was an issue on Windows virtual machine with Qemu/VFIO and AMD GPU. It was impossible to reboot or use a 2nde time the Guest because the GPU was not reinitialized when the Host was shutdown. The only solution to re-use the VM was to reboot the Host OR use a Nvidia GPU.

Actually, the issue is fixed on Windows VM + AMD GPU passed through (i don't know how), i can use more times my VM without reboot the Host.

But if i use my Linux VM with my Rx580, the issue still exist. The first launch works, i can use the Rx580 to play without problem. But if i shutdown/reboot the guest, the Rx580 is "blocked". I need to hard reboot because the system hangs after ~2-3 minutes.

Thanks for your help,
Maxime

(Sorry for my English, i'm French)

**Attachment 138887**, "xorg.conf":
10-amdgpu.conf