Bug 426879 - Very Large Wallpaper Directories Hang plasmashell
Summary: Very Large Wallpaper Directories Hang plasmashell
Status: RESOLVED DUPLICATE of bug 371455
Alias: None
Product: plasmashell
Classification: Plasma
Component: Image Wallpaper (show other bugs)
Version: 5.18.5
Platform: Ubuntu Linux
: NOR crash
Target Milestone: 1.0
Assignee: Marco Martin
Depends on:
Reported: 2020-09-22 16:37 UTC by Aaron Goldblatt
Modified: 2020-09-23 18:15 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:


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Description Aaron Goldblatt 2020-09-22 16:37:42 UTC
When adding very large directory (70k+ images) of wallpapers for slideshow mode, plasmashell pegs one core to 100% and locks up.

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

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.

The directory should be added and the system should begin randomly rotating wallpapers.

Linux/KDE Plasma: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

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.
Comment 1 Nate Graham 2020-09-23 18:15:17 UTC
Same root cause as Bug 371455.

*** This bug has been marked as a duplicate of bug 371455 ***