https://bugs.kde.org/show_bug.cgi?id=504537
Bug ID: 504537
Summary: Screen stays black after display standby on lock
screen – only TTY switch revives it (Wayland, Plasma
6, NVIDIA)
Classification: Plasma
Product: plasmashell
Version First 6.3.5
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: "Manage Desktop and Panels" window
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Created attachment 181531
--> https://bugs.kde.org/attachment.cgi?id=181531&action=edit
Log while I do the reproduced steps and also try again with the connected
screen
SUMMARY
If I want to lock my screen and put the display in standby, the display stays
black when I wake it up. It only comes back on when I change the tty. If i
connect a second screen the bug disappears. if i disconnect the screen the bug
comes back.
The same problem also occurs with Arch Linux
Blind typing also works.
I don't know if it is a screen (driver) problem or if Nvidia is to blame. I
haven't tried it with Gnome yet, but I probably will.
I have no problems with suspend (power save), it works perfectly after waking
up.
STEPS TO REPRODUCE
1. In unlocked Plasma session press Meta + L (to lock the screen and switch off
the display)
2. Wait until the display switches to standby mode (or press ESC)
3. Press a random key to wake up the PC
- plug out sound appears
- plug in sound appears
- standby led disappears, but display remains exactly the same black as in
standby (no backlight comes on)
OBSERVED RESULT
Display remains black
EXPECTED RESULT
Display switches on and the lock screen should be displayed
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
Operating System: Fedora Linux 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel Version: 6.14.6-300.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × Intel® Core™ i9-9900 CPU @ 3.10GHz
Memory: 62.6 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3090
Display (LC49G95T): 5120x1440 @ 240 Hz in 49" [External, HDR] (Connected via
DP) (49" Odyssey G9)
ADDITIONAL INFORMATION
During testing, I plugged in a USB stick in the black display state after
changing the tty and unlocking, the plasmashell crashed.
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