https://bugs.kde.org/show_bug.cgi?id=513348
Bug ID: 513348
Summary: Some screen do not reactivate after sleep mode
Classification: Plasma
Product: KScreen
Version First 6.5.4
Reported In:
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: common
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
After monitors enter sleeping mode (as defined in energy management), they
sometimes do not wake up.
STEPS TO REPRODUCE
1. Set shutdown screen timer to 1min when screen is locked (to shut down the
screens faster)
2. Lock the screens
3. Wait until the screens shut down (turn black), external monitor reports "no
signal available"
4. Login (the screens blink, but the issue can happen when both are finished
blinking)
OBSERVED RESULT
This does not occur every time:
- One of the screens (not necessarily the one which was logged into) is not
updated
- Display configuration shows "No monitor detected" in a red banner
- 1 processor runs at 100%
EXPECTED RESULT
Both screens are updated
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20251211
Kernel Version: 6.18.0-2-default (64-bit)
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
Graphics Platform: Wayland
Processors: 16 × 11th Gen Intel® Core™ i7-11800H @ 2.30GHz
Memory: 16 Gio of RAM (15.4 Gio usable)
Graphics Processor: llvmpipe
ADDITIONAL INFORMATION
To restore the screens, the only way I found, is to use a custom tool I made so
that I can shutdown manually a monitor using libKScreen
(https://github.com/pasccom/ShutdownMonitor). The tool is no running when I
have the issue in the first place.
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