SUMMARY When browsing a folder with media on a ZFS filesystem, thumbnails are generated correctly but not saved to the cache. Reopening the same folder causes the thumbnails to be re-generated each time. STEPS TO REPRODUCE 1. Clear ~/.cache/thumbnails 2. Browse a folder on a ZFS mount with pictures, let thumbnails generate 3. Check ~/.cache/thumbnails, it's still empty OBSERVED RESULT Thumbnails are not saved to the cache EXPECTED RESULT Thumbnails should be saved to the cache SOFTWARE/OS VERSIONS KDE Plasma Version: 6.1.2 KDE Frameworks Version: 6.3.0 Qt Version: 6.7.2
I am also using ZFS (on external, not system drive) and the thumbnail generation works (is saved to the cache folder). Add new image to a ZFS filesystem, run "find ~/.cache/thumbnails/ -mtime -2" and open last thumbnail in a image viewer to see if it is the expected one. $ inxi -S Debian 12 (stable), 6.1.0-27-amd64, KDE 5.27.5 $ dolphin --version dolphin 22.12.3 $ zfs --version zfs-2.1.11-1+deb12u1 zfs-kmod-2.1.11-1+deb12u1
I am seeing the same issue on my desktop PC, but not on my Mini PC. Both are running Arch Linux with the same package versions. I notice the thumbnailing is working on the root partition which is ZFS, but not on any any other ZFS pools mounted on /run/media/username. The one difference between them is that my desktop's root partition is on an unencrypted ZFS drive, but the mini pc's root partition is on an encrypted BTRFS drive, and I am wondering if its related to this somehow. https://bugs.kde.org/show_bug.cgi?id=443806 because thumbnails are being generated, but not cached. KDE Plasma 6.2.4 KDE Frameworks 6.9.0 Qt Version: 6.8.1