https://bugs.kde.org/show_bug.cgi?id=464395
Bug ID: 464395
Summary: Screen flashes between all white and what should be
displayed after return from Screen Energy Saving
Classification: Plasma
Product: kscreenlocker
Version: 5.26.5
Platform: OpenSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: cmrnt...@gmail.com
Target Milestone: ---
SUMMARY
***
Screen flashes between all white and the actual display contents after
returning from "Screen Energy Saving".
***
STEPS TO REPRODUCE
1. Turn on "Screen Energy Saving" within the Power Management tab of the plasma
Desktop Configure app. This is the default.
2. Let the computer sit idle until Screen Energy Saving is activated.
3. Start using the computer again.
OBSERVED RESULT
Screen flashes between all white and what it should display. Pointer movements
seem to correlate with the flashing. Leaving the mouse motionless can give
either an all white or normal result. Flashing begins again if the pointer is
moved. Repeating the process will eventually lead to a screen that is all white
all the time.
EXPECTED RESULT
Computer returns to normal display after return from Screen Energy Saving mode.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: OpenSuSE TW, Kernel 6.1.4
(available in About System)
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.101
Qt Version: 5.15
ADDITIONAL INFORMATION
This appears to be hardware specific.
The computer that displays the bug is an HP Elitebook 845 G9 with an AMD Ryzen
7 processor and integrated gpu.
The bug is not present on an older HP Elitebook 820 G2 with an Intel Broadwell
Core i7.
There are no errors in dmesg.
I do not see any errors in journalctl.
The bug is not activated by opening and closing the laptop lid which also turns
off the display.
The computer never crashes when the bug is provoked.
The bug does not seem to be provoked by kscreenlocker.
It is possible to switch to a VT console.
A normal screen is recovered by killing X and allowing it to restart.
It is not clear that this is a plasma/kde bug.
The computer has been "live" for days now and MS windows runs fine and
seemingly rule out a hardware malfunction.
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