https://bugs.kde.org/show_bug.cgi?id=507112
Bug ID: 507112
Summary: kscreenlocker_greet uses 100% CPU after laptop lid is
closed and reopened (Wayland)
Classification: Plasma
Product: plasmashell
Version First master
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Screen locking
Assignee: plasma-b...@kde.org
Reporter: tunahan...@gmail.com
Target Milestone: 1.0
Created attachment 183274
--> https://bugs.kde.org/attachment.cgi?id=183274&action=edit
htop
SUMMARY
After closing and reopening the laptop lid, the `kscreenlocker_greet` process
remains active and consumes 100% CPU usage indefinitely. This leads to high CPU
temperatures and increased fan activity, even though the screen unlocks
normally.
STEPS TO REPRODUCE
1. Close the laptop lid (Power settings are set to lock the session on lid
close).
2. Wait for a few seconds.
3. Reopen the lid and log back into the session.
OBSERVED RESULT
- The screen unlocks as expected, but `kscreenlocker_greet` continues running
in the background.
- It consumes over 100% CPU (confirmed via `htop`).
- System temperature rises (my Ryzen 7 7435HS CPU jumps to over 70°C).
- I had to manually terminate it with `pkill kscreenlocker_greet`.
EXPECTED RESULT
- `kscreenlocker_greet` should exit cleanly after unlocking the session.
- CPU usage should return to normal.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux (kernel 6.15.5-zen1-1-zen)
KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Graphics Platform: Wayland
ADDITIONAL INFORMATION
- GPU: NVIDIA RTX 4060 Laptop GPU (using dedicated GPU mode, no hybrid
graphics)
- Laptop: ASUS TUF Gaming A15 FA507NVR
- Screenshot of the issue attached (htop showing high CPU usage)
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