SUMMARY If I put large USB medium into my computer and open in Dolphin, some background process starts and it prevents us from un-mounting device. STEPS TO REPRODUCE 1. Put large USB medium with a lot of files into computer and open it in Dolphin 2. After few time (seconds or minute) try umount/eject it OBSERVED RESULT Dolphin says: One or more files in this device are opened in program "dolphintvmYuY.9.slave-socket". (This is free translation from Lithuanian into English – not exact wording) I see active process: /usr/lib64/qt5/plugins/kf5/kio/thumbnail.so Device is still mounted. EXPECTED RESULT Any low priority background process (e.g. thumbnail.so) must be killed immediately. Device should be umounted. SOFTWARE/OS VERSIONS Operating System: openSUSE Leap 15.2 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.71.0 Qt Version: 5.12.7 Kernel Version: 5.3.18-lp152.29-default OS Type: 64-bit ADDITIONAL INFORMATION Tested USB medium has 64GB, is near full, contains ~5000 files and ~400 directories.
Workaround: After killing thumbnail.so process manually, I can un-mount USB-stick successfully via Dolphin or KDE Plasma system tray.
*** This bug has been marked as a duplicate of bug 404652 ***