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