Op 05-05-2022 om 16:08 schreef Arjen:
On Thursday, May 5th, 2022 at 15:56, Jack Raats <[email protected]> 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
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