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From: Brandon Nielsen <>
Subject: [Bug Report] Desktop monitor sleep regression
Date: Mon, 6 Dec 2021 18:21:05 -0600	[thread overview]
Message-ID: <> (raw)

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. I have 
verified the issue exists in latest master 

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] -
[1] -

             reply	other threads:[~2021-12-07  0:21 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-07  0:21 Brandon Nielsen [this message]
2021-12-07  7:20 ` Thorsten Leemhuis
2021-12-17 14:46   ` Thorsten Leemhuis
2021-12-17 14:52     ` Imre Deak
2021-12-17 17:19       ` Thorsten Leemhuis
2021-12-07  8:59 ` Geert Uytterhoeven

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