https://bugs.kde.org/show_bug.cgi?id=506375
Bug ID: 506375
Summary: External monitor wake up after sleep
Classification: Plasma
Product: kwin
Version First 6.4.1
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Created attachment 182792
--> https://bugs.kde.org/attachment.cgi?id=182792&action=edit
Debug Log for powerdevil and kwin (6.4.1)
SUMMARY
External monitor wakes up unexpectedly after powerdevil turns off both displays
during screen lock
STEPS TO REPRODUCE
1. Lock the screen (with two monitors connected - laptop built-in and HDMI
external)
2. Wait 1 minute for powerdevil to turn off both displays
3. Observe behavior after approximately 30 seconds
OBSERVED RESULT
1.Both displays turn off simultaneously after 1 minute of screen lock
(expected)
2. After ~30 seconds, computer emits two consecutive beep sounds
3. External HDMI monitor wakes up automatically while built-in display remains
off
4. External monitor stays on indefinitely
EXPECTED RESULT
1. Both displays should remain off during entire screen lock period
2. Neither display should wake up without user interaction
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 41
KDE Plasma Version: 6.4.1
KDE Frameworks Version: 6.15.0
Qt Version: 6.8.3
ADDITIONAL INFORMATION
See attached logs for details.
PS: Behavior stops when downgrading kwin from 6.4.1-1 to 6.3.5-2 (beeps persist
but display stays off)
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