https://bugs.kde.org/show_bug.cgi?id=426879
Bug ID: 426879
Summary: Very Large Wallpaper Directories Hang plasmashell
Product: plasmashell
Version: 5.18.5
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: Image Wallpaper
Assignee: notm...@gmail.com
Reporter: rnbw...@gmail.com
CC: plasma-b...@kde.org
Target Milestone: 1.0
When adding very large directory (70k+ images) of wallpapers for slideshow
mode, plasmashell pegs one core to 100% and locks up.
STEPS TO REPRODUCE
1. Wallpaper
2. Folder OR Desktop view (doesn't matter)
3. Slideshow
4. any positioning, but my preference is Scaled, Keep Proportions
5. any order
6. add folder
7. boom
OBSERVED RESULT
1. plasmashell spikes one core to 100% usage, with no observable hard drive
activity. The other three cores remain at normal load.
2. plasmashell stops responding to input. Right-click on the desktop fails,
task bar stops responding, launcher stops responding, notifications stop, etc.
3. Already-running programs (e.g., brave browser, xchat, terminal windows)
continue functioning normally.
Shutting down and restarting plasmashell from a terminal window does not
resolve the issue, unless the target wallpaper directory is emptied or removed
prior to restart. When plasmashell is restarted, the crash is immediate as it
tries to parse the wallpaper directory on startup.
EXPECTED RESULT
The directory should be added and the system should begin randomly rotating
wallpapers.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
ADDITIONAL INFORMATION
32gb RAM
Intel i5-6600
/ on a 128gb SSD
~ on a 2tb HDD
nvidia 450 drivers on a GTX1060 6gb, 3 heads each at 1920x1080
Adding a wallpaper folder with 10k files works correctly, but adding a second
directory with an additional 10k files causes the observed behavior.
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