SUMMRY This bug is a consequence of bug 387961 STEPS TO REPRODUCE 1. open System Settings > Removable Storage > Device Actions 2. double click on a device action available for your removable device (I double-clicked on "Open with File Manager" whose second column says "Storage Volume, Storage Drive, Storage Access") 3. edit its description (first text field) and click on "Ok" button 4. connect your removable device to usb port (I used a flash drive) 5. click on Disks & Devices applet in system tray 6. click on "Mount and open" button of your removable device available in Disks & Devices applet OBSERVED RESULT nothing happens EXPECTED RESULT "Mount and open" button should work SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.21.4 KDE Frameworks Version: 5.81.0 Qt Version: 5.15.2 Graphics Platform: X11
Bug is probably here: https://invent.kde.org/plasma/plasma-workspace/-/blob/master/applets/devicenotifier/package/contents/ui/DeviceItem.qml#L127 The "Mount and open" action in the UI is hardcoded to open an action with the filename "test-predicate-openinwindow.desktop". Probably renaming the action in the KCM creates a new .desktop file with a different name, so the action doesn't work anymore. I have no idea how to fix this though.