Re: [PVE-User] Proces BOOTFB

[Jack Raats <mlist@jarasoft.net>]

Op 05-05-2022 om 16:08 schreef Arjen:
> On Thursday, May 5th, 2022 at 15:56, Jack Raats <mlist@jarasoft.net> wrote:
>
>> Hi,
>>
>> At this moment I use proxmox 7.2-3. Before this version I could run a VM
>> passthrough.
>> On proxmox 7.2-3 I get an error that BAR1 doesn't have memory anymore.
>> The memory ism occupied by a proces called BOOTFB.
>>
>> What is this proces doing?
>> How to get the passthroug thing working again?
>>
>> Thanks
>> Jack Raats
> Before (with kernel 5.13) using video=efifb:off video=vesafb:off would fix this (at the expense of boot messages).
> With 7.2 (or kernel 5.15), I would expect video=simplefb:off to fix this, but I my experience this does not work for every GPU.
>
> I found that, for AMD GPUs, unblacklisting amdgpu AND not early binding to vfio_pci AND removing those video= parameters works best.
> amdgpu just takes over from the bootfb, and does release the GPU nicely to vfio_pci when starting the VM.
> (Of course, for AMD vendor-reset and reset_method=device_specific might be required.)
> I don't know if this also works for nouveau or i915.
>
> I hope this helps,
> Arjen

I've tried all the possible, but nothing works...
Until I started the old kernel and everything worked perfectly!

I think that amdgpu, which is included in the kernel, doesn't takes over 
from bootfb

Greetings,
Jack Raats