SUMMARY Dolphin generates a large number of duplicate thumbnails in /tmp STEPS TO REPRODUCE 1. Open /tmp in Dolphin 2. If there are some photos, Dolphin will generate thumbnails for it and then generate thumbnails for new thumbnails OBSERVED RESULT /tmp is filled with thumbnails EXPECTED RESULT Nothing happens SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux KDE Plasma Version: 6.1.5 KDE Frameworks Version: 6.6.0 Qt Version: 6.7.3 ADDITIONAL INFORMATION Video: https://pub-949ce129cfa3455d8b29dd4b0982f772.r2.dev/2024-10-04%2016-53-09.mkv
Caused by the new external thumbnailer tech. Since the path is /tmp the save conditional in ::saveThumbnailData doesn't bite and we keep generating new thumbnails. The fact that it keeps them around is bug #494061
A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kio/-/merge_requests/1728
Git commit 9f3d680248ab863faa97decff289babd6b34252b by Akseli Lahtinen. Committed on 04/10/2024 at 14:31. Pushed by akselmo into branch 'master'. previewjob: Use .cache as temp folder, delete temp file after use Current solution moves items into `/tmp/` which is not good, since any user can see thumbnail images from there. The files are also not deleted after the image is generated. This moves the tmp files into `~/.cache/thumbnails/size/tmp/` and then when the thumbnailer is done, the file is removed. We also do not use standard thumbnailers if caching is turned off, since we do not have thumbnail folder in the first place, and the thumbnailers rely on that. Related: bug 494061 M +11 -3 src/gui/previewjob.cpp https://invent.kde.org/frameworks/kio/-/commit/9f3d680248ab863faa97decff289babd6b34252b
*** This bug has been marked as a duplicate of bug 494061 ***