On Wed, Nov 04, 2020 at 09:21:35AM +0000, Merger, Edgar [AUTOSOL/MAS/AUGS]
wrote:
> AMD-Vi: Completion-Wait loop timed out is at [65499.964105] but amdgpu-error
> is at [ 52.772273], hence much earlier.
Yes, but it could be the same underlying reason.
> Have not tried to use an upstream kernel yet. Which one would you recommend?
For a first try, use 5.9.3. If it reproduces there, please try booting
with "pci=noats" on the kernel command line.
Please also send me the output of 'lspci -vvv' and 'lspci -t' of the
machine where this happens.
Regards,
Joerg
>
> As far as inconsistencies in the PCI-setup is concerned, the only thing that
> I know of right now is that we haven´t entered a PCI subsystem vendor and
> device ID yet. It is still "Advanced Micro Devices". We will change that soon
> to "General Electric" or "Emerson".
>
> Best regards,
> Edgar
>
> -----Original Message-----
> From: [email protected] <[email protected]>
> Sent: Mittwoch, 4. November 2020 09:53
> To: Merger, Edgar [AUTOSOL/MAS/AUGS] <[email protected]>
> Cc: [email protected]
> Subject: [EXTERNAL] Re: amdgpu error whenever IOMMU is enabled
>
> Hi Edgar,
>
> On Fri, Oct 30, 2020 at 02:26:23PM +0000, Merger, Edgar [AUTOSOL/MAS/AUGS]
> wrote:
> > With one board we have a boot-problem that is reproducible at every ~50
> > boot.
> > The system is accessible via ssh and works fine except for the
> > Graphics. The graphics is off. We don´t see a screen. Please see
> > attached “dmesg.log”. From [52.772273] onwards the kernel reports
> > drm/amdgpu errors. It even tries to reset the GPU but that fails too.
> > I tried to reset amdgpu also by command “sudo cat
> > /sys/kernel/debug/dri/N/amdgpu_gpu_recover”. That did not help either.
>
> Can you reproduce the problem with an upstream kernel too?
>
> These messages in dmesg indicate some problem in the platform setup:
>
> AMD-Vi: Completion-Wait loop timed out
>
> Might there be some inconsistencies in the PCI setup between the bridges and
> the endpoints or something?
>
> Regards,
>
> Joerg
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