On Fri, Dec 17, 2021 at 03:46:21PM +0100, Thorsten Leemhuis wrote:

added some CCs Geert added in his reply

On 07.12.21 08:20, Thorsten Leemhuis wrote:

quoted

[TLDR: adding this regression to regzbot; most of this mail is compiled
from a few templates paragraphs some of you might have seen already.]

Hi, this is your Linux kernel regression tracker speaking.

/me again

What's up here? We are getting close to rc6, but there afaics wasn't any
reply of substance since the report ten days ago. Hence:

Could anybody please comment on this? Imre Deak, the commit Brandon
found in the bisection contains a patch of yours, do you maybe have an
idea what's up here?

Yes,
https://bugzilla.kernel.org/show_bug.cgi?id=215203

based on which the problem is somehere in the AMD driver.

Ciao, Thorsten

#regzbot poke

quoted

Adding the regression mailing list to the list of recipients, as it
should be in the loop for all regressions, as explained here:
https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html

Also adding the authors and reviewers of the culprit and two appropriate
mailing lists.

On 07.12.21 01:21, Brandon Nielsen wrote:

quoted

Monitors no longer sleep properly on my system (dual monitor connected
via DP->DVI, amdgpu, x86_64). The monitors slept properly on 5.14, but
stopped during the 5.15 series. I have also filed this bug on the kernel
bugzilla[0] and downstream[1].

I have performed a bisect, first "bad" commit to master is
55285e21f04517939480966164a33898c34b2af2[1], the same change made it
into the 5.15 branch as e3b39825ed0813f787cb3ebdc5ecaa5131623647.

TWIMC: That was for 5.15.3

quoted

I have
verified the issue exists in latest master
(a51e3ac43ddbad891c2b1a4f3aa52371d6939570).

Steps to reproduce:

  1. Boot system (Fedora Workstation 35 in this case)
  2. Log in
  3. Lock screen (after a few seconds, monitors will enter power save
"sleep" state with backlight off)
  4. Wait (usually no more than 30 seconds, sometimes up to a few minutes)
  5. Observe monitor leaving "sleep" state (backlight comes back on),
but nothing is displayed

[0] - https://bugzilla.kernel.org/show_bug.cgi?id=215203
[1] - https://bugzilla.redhat.com/show_bug.cgi?id=2028613

To be sure this issue doesn't fall through the cracks unnoticed, I'm
adding it to regzbot, my Linux kernel regression tracking bot:

#regzbot ^introduced 55285e21f04517939480966164a33898c34b2af2
#regzbot title fbdev/efifb: Monitors no longer sleep (amdgpu dual
monitor setup)
#regzbot ignore-activity

Reminder: when fixing the issue, please add a 'Link:' tag with the URL
to the report (the parent of this mail), then regzbot will automatically
mark the regression as resolved once the fix lands in the appropriate
tree. For more details about regzbot see footer.

Sending this to everyone that got the initial report, to make all aware
of the tracking. I also hope that messages like this motivate people to
directly get at least the regression mailing list and ideally even
regzbot involved when dealing with regressions, as messages like this
wouldn't be needed then.

Don't worry, I'll send further messages wrt to this regression just to
the lists (with a tag in the subject so people can filter them away), as
long as they are intended just for regzbot. With a bit of luck no such
messages will be needed anyway.

Ciao, Thorsten, your Linux kernel regression tracker.

P.S.: As a Linux kernel regression tracker I'm getting a lot of reports
on my table. I can only look briefly into most of them. Unfortunately
therefore I sometimes will get things wrong or miss something important.
I hope that's not the case here; if you think it is, don't hesitate to
tell me about it in a public reply. That's in everyone's interest, as
what I wrote above might be misleading to everyone reading this; any
suggestion I gave they thus might sent someone reading this down the
wrong rabbit hole, which none of us wants.

BTW, I have no personal interest in this issue, which is tracked using
regzbot, my Linux kernel regression tracking bot
(https://linux-regtracking.leemhuis.info/regzbot/). I'm only posting
this mail to get things rolling again and hence don't need to be CC on
all further activities wrt to this regression.