SUMMARY As a user I want to start a dolphin in the background from my command line without receive output from the dolphin process. STEPS TO REPRODUCE 1. Start a dolphin with "dolphin > /dev/null &" 2. The shell still receives the output from stderr OBSERVED RESULT $ dolphin > /dev/null & [1] 14361 $ kf.itemviews: User of KWidgetItemDelegate should not delete widgets created by createItemWidgets! kf.itemviews: User of KWidgetItemDelegate should not delete widgets created by createItemWidgets! kf.itemviews: User of KWidgetItemDelegate should not delete widgets created by createItemWidgets! EXPECTED RESULT Use "dolphin --silent" or "dolphin --quiet" to stop receiving stdout or stderr from the dolphin process. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux (available in About System) KDE Plasma Version: 5.19.4 KDE Frameworks Version: 5.73.0 Qt Version: 5.15.0
Your shell has a built-in method to do this which works with any program: dolphin >/dev/null 2>&1 No need to add a special thing to Dolphin. :)
Or use kdebugsettings to disable all dolphin output