Bug#944350: RE: [External] Bug#944350: systemd: screen remains off after waking up from suspend

From	Jiri Kanicky <j@ganomi.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#944350: RE: [External] Bug#944350: systemd: screen remains off after waking up from suspend
Date	2019-11-30 13:10 +0100
Message-ID	<z89Jw-5sL-3@gated-at.bofh.it> (permalink)
References	(6 earlier) <z6c8N-36I-1@gated-at.bofh.it> <z6pIK-336-13@gated-at.bofh.it> <z6pIK-336-13@gated-at.bofh.it> <z0cXT-6Os-5@gated-at.bofh.it> <z6pIK-336-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Hi.

It seems that Debian 5.3.0-2-amd64 includes the code in the patch 
already and I still have the issue.

Jiri

On Mon, 25 Nov 2019 16:45:55 +0000 Mark Pearson <mpearson@lenovo.com> wrote:

 > Hi,
 >
 > I don't know if this is helpful but I recently debugged a similar 
issue on the Lenovo P1Gen2. There the problem is only with the 
integrated graphics and an OLED screen - we tracked it down to an issue 
in the i915 driver where it wasn't giving enough time for eDP link 
training. It turned out this was due to the driver using the wrong 
clocks after a suspend and resume .
 >
 > Intel recently up-streamed a fix (commit 2f216a85 - it went into 
5.4-rc8)
 >
 > I'm working on doing a patch that I'm hoping to get into Debian to 
backport - just not done yet :) The patch is pretty small (I've attached 
it) so you might want to give it a go and see if it helps.
 >
 > Note - we did also test X1 extreme with OLED panel and didn't see a 
problem there....but it's a really subtle timing issue so some units 
might be more susceptible than others. Maybe worth a go?
 >
 > If it does make a difference let me know.
 > Mark
 >

Thread

Bug#944350: systemd: screen remains off after waking up from suspend Michael Biebl <biebl@debian.org> - 2019-11-08 16:30 +0100
  Processed: Re: Bug#944350: systemd: screen remains off after  waking up from suspend "Debian Bug Tracking System" <owner@bugs.debian.org> - 2019-11-08 16:50 +0100
  Bug#944350: systemd: screen remains off after waking up from suspend Jiri Kanicky <j@ganomi.com> - 2019-11-25 03:20 +0100
    Bug#944350: [External]  Bug#944350: systemd: screen remains off after waking up from suspend Mark Pearson <mpearson@lenovo.com> - 2019-11-25 17:50 +0100
      Bug#944350: RE: [External] Bug#944350: systemd: screen remains off after waking up from suspend Jiri Kanicky <j@ganomi.com> - 2019-11-30 13:10 +0100
        Bug#944350: RE: [External] Bug#944350: systemd: screen remains off after waking up from suspend Mark Pearson <mpearson@lenovo.com> - 2019-12-06 20:00 +0100
          Bug#944350: RE: Bug#944350: RE: [External] Bug#944350: systemd: screen remains off after waking up from suspend Jiri Kanicky <j@ganomi.com> - 2019-12-30 03:20 +0100
          Bug#944350: RE: Bug#944350: RE: [External] Bug#944350: systemd: screen remains off after waking up from suspend Jiri Kanicky <j@ganomi.com> - 2020-01-27 06:00 +0100

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