[REGRESSION] AMD GPU regression in 5.16.18..5.17.4 #forregzbot

[Thorsten Leemhuis]

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#regzbot fixed-by: 78b12008f20

On 25.04.22 23:29, Deucher, Alexander wrote:
> [Public]
> 
>> -----Original Message-----
>> From: Demi Marie Obenour <demi at invisiblethingslab.com>
>> Sent: Sunday, April 24, 2022 7:39 PM
>> To: Thorsten Leemhuis <regressions at leemhuis.info>; Greg KH 
>> <gregkh at linuxfoundation.org>
>> Cc: amd-gfx at lists.freedesktop.org; regressions at lists.linux.dev; 
>> Deucher, Alexander <Alexander.Deucher at amd.com>; Koenig, Christian 
>> <Christian.Koenig at amd.com>; Pan, Xinhui <Xinhui.Pan at amd.com>
>> Subject: Re: [REGRESSION] AMD GPU regression in 5.16.18..5.17.4
>>
>> On Sun, Apr 24, 2022 at 11:02:43AM +0200, Thorsten Leemhuis wrote:
>>> CCing the amdgpu maintainers
>>>
>>> On 24.04.22 08:12, Greg KH wrote:
>>>> On Sat, Apr 23, 2022 at 12:06:33PM -0400, Demi Marie Obenour wrote:
>>>>> Two Qubes OS users reported that their AMD GPU systems did not 
>>>>> work on 5.17.4, while 5.16.18 worked fine.  Details can be found 
>>>>> on https://github.com/QubesOS/qubes-issues/issues/7462.  The 
>>>>> initial report listed the GPU as “Advanced Micro Devices, Inc. 
>>>>> [AMD/ATI] Renoir [1002:1636} (rev d3) (prog-if 00 [VGA 
>>>>> controller])” and the CPU as “AMD Ryzen 5 PRO 4650U with Radeon Graphics”.
>>>>>
>>>>> #regzbot introduced: v5.16.18..v5.17.4
>>>>
>>>> That's a big range, can you use 'git bisect' to track it down?
>>>
>>> FWIW, in another mail in this thread and
>>> https://github.com/QubesOS/qubes-issues/issues/7462#issuecomment-
>> 11076
>>> 81126 it was clarified that the problem was introduced between 
>>> 5.17.3 and 5.17.4, where a few amdgpu changes were applied. Maybe 
>>> they are the reason.
>>>
>>> Anyway: Yes, as Gregkh said, a bisection really would help. But 
>>> maybe the amdgfx developers might already have an idea what might be 
>>> wrong here? The QubesOS ticket linked above has some more details.
>>
>> The reporter was able to bisect the regression.  I am not surprised 
>> that this commit caused problems for Qubes OS, as dom0 in Qubes OS is 
>> technically a guest of Xen.
>>
>> #regzbot ^introduced: b818a5d374542ccec73dcfe578a081574029820e
> 
> Can you please follow up on the bug ticket:
> https://gitlab.freedesktop.org/drm/amd/-/issues/1985
> It will be easier to track everything there.
> 
> Alex