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

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FYI Lenovo also pushed a fix into a BIOS.

CHANGES IN THIS RELEASE
   Version 1.28

[Important updates]
   Nothing

[New functions or enhancements]
- Supported BIOS password authentication before entering into MEBx.
- Updated Regulatory Information.

[Problem fixes]
- Fixed an issue where OLED panel might not trun on after resuming from sleep on Linux.

https://download.lenovo.com/pccbbs/mobiles/n2oul07w.txt


Regards, Jiri


On Fri, 6 Dec 2019 18:47:05 +0000 Mark Pearson <mpearson@lenovo.com> wrote:

 > Hi Jiri,
 >
 > I'm pretty sure it's not in 5.3.0-2. Are you sure? I can look again 
but I recently did put in a merge request to get it pulled into sid: 
https://salsa.debian.org/kernel-team/linux/merge_requests/188
 >
 > Not sure if/when it will be accepted (it's only my 2nd attempt at 
doing this) but hopefully someone looks at it and thinks it's useful)
 >
 > Mark
 >
 > > -----Original Message-----
 > > From: Jiri Kanicky <j@ganomi.com>
 > > Sent: Saturday, November 30, 2019 6:56 AM
 > > To: 944350@bugs.debian.org
 > > Subject: Bug#944350: RE: [External] Bug#944350: systemd: screen 
remains
 > > off after waking up from suspend
 > >
 > > 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
 > > >
 >

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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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