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Bug#1043564: linux: Please Re-enable DC states for drm/i915

Started bySalvatore Bonaccorso <carnil@debian.org>
First post2023-08-13 07:50 +0200
Last post2023-08-13 18:00 +0200
Articles 3 — 3 participants

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  Bug#1043564: linux: Please Re-enable DC states for drm/i915 Salvatore Bonaccorso <carnil@debian.org> - 2023-08-13 07:50 +0200
    Processed: Re: Bug#1043564: linux: Please Re-enable DC states for  drm/i915 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2023-08-13 07:50 +0200
    Bug#1043564: linux: Please Re-enable DC states for drm/i915 Jesse Rhodes <jesse@sney.ca> - 2023-08-13 18:00 +0200

#80031 — Bug#1043564: linux: Please Re-enable DC states for drm/i915

FromSalvatore Bonaccorso <carnil@debian.org>
Date2023-08-13 07:50 +0200
SubjectBug#1043564: linux: Please Re-enable DC states for drm/i915
Message-ID<H2c9c-1tbv-5@gated-at.bofh.it>
Control: tags -1 + confirmed upstream fixed-upstream pending

Hi,

On Sat, Aug 12, 2023 at 10:40:09PM -0400, Jesse Rhodes wrote:
> Source: linux
> Severity: important
> Tags: patch
> X-Debbugs-Cc: jesse@sney.ca
> 
> Dear debian kernel team,
> 
> The upstream commit "drm/i915: Disable DC states for all commits" [1] breaks my
> Asus C204M Chromebook's ability to wake the screen after power management shuts
> it off. This also produces a kernel stack trace, attached. It's likely that it
> has the same effect on other Intel Gemini Lake hardware or UHD 600 video
> devices.
> 
> I discovered this commit by bisecting between 6.1.0-7 (6.1.20-2) and
> 6.1.0-8 (6.1.25-1), and confirmed that the current 6.1.0-10 (6.1.38-2) does not
> have the issue if intel_display.c is rolled back to its previous state.
> 
> Attached is also the lspci output for the affected machine.
> 
> I hope that "Tags: patch" is allowed as a tag when the fix is to revert a
> specific commit, and I apologize if this was already reported and I couldn't
> find it in the list.
> 
> Please let me know if you need any more information, as I would be happy to
> keep debugging!

Thanks for the report. The commit was found indeed to cause issues and
was for now reverted upstream in the 6.1.y series and released in
6.1.45.

The fix will be contained in the next bookworm point release update,
have just added the bugcloser for this issue as well in the current
rebase work:

https://salsa.debian.org/kernel-team/linux/-/merge_requests/803/diffs?commit_id=050b84b3c21f5a5b5e15b562da2ffc9f0edfda3a

Regards,
Salvatore

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#80032 — Processed: Re: Bug#1043564: linux: Please Re-enable DC states for drm/i915

From"Debian Bug Tracking System" <owner@bugs.debian.org>
Date2023-08-13 07:50 +0200
SubjectProcessed: Re: Bug#1043564: linux: Please Re-enable DC states for drm/i915
Message-ID<H2c9c-1tbv-7@gated-at.bofh.it>
In reply to#80031
Processing control commands:

> tags -1 + confirmed upstream fixed-upstream pending
Bug #1043564 [src:linux] linux: Please Re-enable DC states for drm/i915
Added tag(s) confirmed, pending, and fixed-upstream.

-- 
1043564: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1043564
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#80046

FromJesse Rhodes <jesse@sney.ca>
Date2023-08-13 18:00 +0200
Message-ID<H2lFv-1zmZ-9@gated-at.bofh.it>
In reply to#80031
Ah, great! If only they were all this easy.

Thanks again,

sney

On Sun, Aug 13, 2023 at 1:44 AM Salvatore Bonaccorso <carnil@debian.org> wrote:
>
> Control: tags -1 + confirmed upstream fixed-upstream pending
>
> Hi,
>
> On Sat, Aug 12, 2023 at 10:40:09PM -0400, Jesse Rhodes wrote:
> > Source: linux
> > Severity: important
> > Tags: patch
> > X-Debbugs-Cc: jesse@sney.ca
> >
> > Dear debian kernel team,
> >
> > The upstream commit "drm/i915: Disable DC states for all commits" [1] breaks my
> > Asus C204M Chromebook's ability to wake the screen after power management shuts
> > it off. This also produces a kernel stack trace, attached. It's likely that it
> > has the same effect on other Intel Gemini Lake hardware or UHD 600 video
> > devices.
> >
> > I discovered this commit by bisecting between 6.1.0-7 (6.1.20-2) and
> > 6.1.0-8 (6.1.25-1), and confirmed that the current 6.1.0-10 (6.1.38-2) does not
> > have the issue if intel_display.c is rolled back to its previous state.
> >
> > Attached is also the lspci output for the affected machine.
> >
> > I hope that "Tags: patch" is allowed as a tag when the fix is to revert a
> > specific commit, and I apologize if this was already reported and I couldn't
> > find it in the list.
> >
> > Please let me know if you need any more information, as I would be happy to
> > keep debugging!
>
> Thanks for the report. The commit was found indeed to cause issues and
> was for now reverted upstream in the 6.1.y series and released in
> 6.1.45.
>
> The fix will be contained in the next bookworm point release update,
> have just added the bugcloser for this issue as well in the current
> rebase work:
>
> https://salsa.debian.org/kernel-team/linux/-/merge_requests/803/diffs?commit_id=050b84b3c21f5a5b5e15b562da2ffc9f0edfda3a
>
> Regards,
> Salvatore

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