No passthrough on GEM12 8845HS with Ubuntu 24.04 VM

[roger-]

Followed the guide (skipping the Windows stuff) and set up an Ubuntu VM. It sees the iGPU and boots up okay, but dmesg gives:

[    9.032079] amdgpu 0000:01:00.0: amdgpu: psp gfx command UNKNOWN CMD(0x0) failed and response status is (0x0)
[    9.032084] amdgpu 0000:01:00.0: amdgpu: Failed to load toc
[    9.032089] amdgpu 0000:01:00.0: amdgpu: PSP tmr init failed!
[    9.052130] amdgpu 0000:01:00.0: amdgpu: PSP firmware loading failed
[    9.052134] [drm:amdgpu_device_fw_loading [amdgpu]] *ERROR* hw_init of IP block <psp> failed -22
[    9.052342] amdgpu 0000:01:00.0: amdgpu: amdgpu_device_ip_init failed
[    9.052346] amdgpu 0000:01:00.0: amdgpu: Fatal error during GPU init
[    9.052350] amdgpu 0000:01:00.0: amdgpu: amdgpu: finishing device.
...
<register dump>

It does load the AMD drivers (in the VM) too, but /dev/dri/ is missing:

~$ lsmod
amdgpu              20004864  0
amdxcp                 12288  1 amdgpu
drm_exec               12288  1 amdgpu
gpu_sched              61440  1 amdgpu
drm_buddy              24576  1 amdgpu
drm_suballoc_helper    16384  1 amdgpu
kvm_amd               245760  0
drm_ttm_helper         16384  1 amdgpu
ttm                   110592  2 amdgpu,drm_ttm_helper
ccp                   159744  1 kvm_amd
drm_display_helper    278528  1 amdgpu
kvm                  1425408  1 kvm_amd
i2c_algo_bit           16384  1 amdgpu
video                  77824  1 amdgpu

Also tried extracting my own AMDGopDriver.rom from the latest BIOS (which differed from the one here) but that didn't change anything. Any ideas?

Here is my proxmox config:

And lspci on the host gives:

...
c6:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix3 [1002:1900] (rev c5)
c6:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller [1002:1640]
...

[roger-]

As per #49 i tried Debian 12 with my configuration and the errors went away. Here are the steps:

1. Configure a VM as above / this repo
2. Install Debian 12.7
3. Install the AMD GPU driver: apt install firmware-amd-graphics
4. Reboot and check dmesg for errors. I had a missing firmware file error and downloaded it from here and put in /lib/firmware (not sure if this was necessary)

Was able to get Ollama running with ROCm support, so seems to work (usual AMD iGPU Ollama issues not withstanding).