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From: Thorsten Leemhuis <linux@leemhuis.info>
To: Mark Boddington <lkml@badpenguin.co.uk>,
	Greg KH <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: kernel 5.15.1: AMD RX 6700 XT - Fails to resume after screen blank
Date: Fri, 12 Nov 2021 17:04:43 +0100	[thread overview]
Message-ID: <e0f6f173-95a6-3868-5cc1-44092acd9267@leemhuis.info> (raw)
In-Reply-To: <797107e1-6595-f3ef-e7b2-5784667f73e7@badpenguin.co.uk>

Hi Mark. Replying inline
(https://en.wikipedia.org/wiki/Posting_style#Interleaved_style ), as
that's the norm and kinda expected on Linux kernel mailing lists:

On 11.11.21 00:11, Mark Boddington wrote:
> And also
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=f02abeb0779700c308e661a412451b38962b8a0b
> 
> Maybe if the function is called during resume() without being called
> during init(), bad things happen???

Have you tried to revert any of the patches you suspect to cause this
and see if things improve? And BTW: did 5.15 (aka 5.15.0) work? Or was
some process to resolve this made already somewhere else and I just
missed it?

Ciao, Thorsten (with his Linux kernel regression tracker hat on)

#regzbot poke

> On 10/11/2021 23:02, Mark Boddington wrote:
>> I think I've found the problem.
>>
>> The amdgpu_amdkfd_resume_iommu(adev) call has been moved around a few
>> times recently, but in 5.15.1 it's been removed completely.
>>
>> I think reverting this patch fixes the issue:
>> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=f17dca0ab3f38b19c0f1b935f417f62d4a528723
>>
>>
>> See also:
>> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=714d9e4574d54596973ee3b0624ee4a16264d700
>>
>>
>> Cheers,
>>
>> Mark
>>
>> On 10/11/2021 17:38, Greg KH wrote:
>>> On Wed, Nov 10, 2021 at 04:27:39PM +0000, Mark Boddington wrote:
>>>> Hi all,
>>>>
>>>> I run the mainline Linux kernel on Ubuntu 20.04, built from
>>>> https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.15.1/
>>>>
>>>> There appears to be a regression in 5.15.1 which causes the GPU to
>>>> fail to
>>>> resume after power saving.
>>>>
>>>> Could it be this change??:
>>>>
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c?h=v5.15.1&id=8af3a335b5531ca3df0920b1cca43e456cd110ad
>>>>
>>> If you revert it, does it solve the problem for you?
>>>
>>> If not, what kernel version did work for you with this hardware?
>>>
>>> thanks,
>>>
>>> greg k-h
> 
> 

  reply	other threads:[~2021-11-12 16:04 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-10 16:27 Mark Boddington
2021-11-10 17:38 ` Greg KH
2021-11-10 18:53   ` Mark Boddington
2021-11-10 23:02   ` Mark Boddington
2021-11-10 23:11     ` Mark Boddington
2021-11-12 16:04       ` Thorsten Leemhuis [this message]
2021-11-12 17:24         ` Mark Boddington
2021-11-13  8:15           ` Thorsten Leemhuis

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