[Bug Report] Desktop monitor sleep regression

[Thorsten Leemhuis]

On 17.12.21 15:52, Imre Deak wrote:
> 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:
>>>
>>> [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.

Ha, sorry for the noise then, I really feel stupid: I have no idea why I
didn't check the bug report for an update, as I do normally do. Much
have slipped through. Ohh well, hopefully we one day have have a central
place to handle these things.

Ciao, Thorsten

>> Ciao, Thorsten
>>
>> #regzbot poke
>>
>>> 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:
>>>> 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
>>>
>>>> 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.
>>>
>