From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>,
stable@vger.kernel.org, regressions@lists.linux.dev,
Slade Watkins <srw@sladewatkins.net>, Jerry Ling <jiling@cern.ch>,
intel-gfx@lists.freedesktop.org,
David Matthew Mattli <dmm@mattli.us>
Subject: Re: Regression on 5.19.12, display flickering on Framework laptop
Date: Tue, 4 Oct 2022 14:57:38 +0200 [thread overview]
Message-ID: <YzwtwjZVSJm/S9p0@kroah.com> (raw)
In-Reply-To: <YzwooNdMECzuI5+h@intel.com>
On Tue, Oct 04, 2022 at 03:35:44PM +0300, Ville Syrjälä wrote:
> On Mon, Oct 03, 2022 at 08:28:50PM +0200, Thorsten Leemhuis wrote:
> >
> >
> > On 03.10.22 19:48, Ville Syrjälä wrote:
> > > On Mon, Oct 03, 2022 at 08:45:18PM +0300, Ville Syrjälä wrote:
> > >> On Sat, Oct 01, 2022 at 12:07:39PM +0200, Thorsten Leemhuis wrote:
> > >>> On 30.09.22 14:26, Jerry Ling wrote:
> > >>>>
> > >>>> looks like someone has done it:
> > >>>> https://bbs.archlinux.org/viewtopic.php?pid=2059823#p2059823
> > >>>>
> > >>>> and the bisect points to:
> > >>>>
> > >>>> |# first bad commit: [fc6aff984b1c63d6b9e54f5eff9cc5ac5840bc8c]
> > >>>> drm/i915/bios: Split VBT data into per-panel vs. global parts Best, Jerry |
> > >>>
> > >>> FWIW, that's 3cf050762534 in mainline. Adding Ville, its author to the
> > >>> list of recipients.
> > >>
> > >> I definitely had no plans to backport any of that stuff,
> > >> but I guess the automagics did it anyway.
> > >>
> > >> Looks like stable is at least missing this pile of stuff:
> > >> 50759c13735d drm/i915/pps: Keep VDD enabled during eDP probe
> > >> 67090801489d drm/i915/pps: Reinit PPS delays after VBT has been fully parsed
> > >> 8e75e8f573e1 drm/i915/pps: Split PPS init+sanitize in two
> > >> 586294c3c186 drm/i915/pps: Stash away original BIOS programmed PPS delays
> > >> 89fcdf430599 drm/i915/pps: Don't apply quirks/etc. to the VBT PPS delays if they haven't been initialized
> > >> 60b02a09598f drm/i915/pps: Introduce pps_delays_valid()
> > >>
> > >> But dunno if even that is enough.
> >
> > If you need testers: David (now CCed) apparently has a affected machine
> > and offered to test patches in a different subthread of this thread.
> >
> > >> This bug report is probably the same thing:
> > >> https://gitlab.freedesktop.org/drm/intel/-/issues/7013
> >
> > Sounds like it.
> >
> > > Also cc intel-gfx...
> >
> > Ahh, sorry, should have done that when I CCed you.
>
> After looking at some logs we do end up with potentially bogus
> panel power sequencing delays, which may harm the LCD panel.
>
>
> Greg, I recommend immediate revert of this stuff, and new stable
> release ASAP. Plus a recommendation that no one using laptops
> with Intel GPUs run 5.19.12.
Ok, will do, I'll go do that right now, thanks and sorry for the
problems.
greg k-h
next prev parent reply other threads:[~2022-10-04 13:01 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-30 2:26 Regression on 5.19.12, display flickering on Framework laptop Jerry Ling
2022-09-30 4:37 ` Greg KH
2022-09-30 5:59 ` Greg KH
2022-09-30 11:11 ` Slade Watkins
2022-09-30 11:22 ` Greg Kroah-Hartman
2022-09-30 11:56 ` Slade Watkins
2022-09-30 12:26 ` Jerry Ling
2022-09-30 12:49 ` Slade Watkins
2022-10-01 10:07 ` Thorsten Leemhuis
2022-10-01 12:34 ` Hans de Goede
2022-10-03 17:45 ` Ville Syrjälä
2022-10-03 17:48 ` Ville Syrjälä
2022-10-03 18:28 ` Thorsten Leemhuis
2022-10-04 12:35 ` Ville Syrjälä
2022-10-04 12:57 ` Greg Kroah-Hartman [this message]
[not found] ` <9aae6b15-265a-4ef9-87c1-83dfe5094378@smtp-relay.sendinblue.com>
2022-10-04 13:40 ` Greg Kroah-Hartman
2022-10-04 13:44 ` Ville Syrjälä
2022-10-04 14:28 ` Greg Kroah-Hartman
2022-09-30 5:10 ` Thorsten Leemhuis
2022-09-30 13:05 ` Jerry Ling
2022-09-30 15:02 ` Greg KH
2022-10-03 16:42 ` David Matthew Mattli
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