First of all, many thanks for your help. https://pastebin.ubuntu.com/p/nrtyQZMPdB/plain/
Firs I disabled the keystrokes at the two items in question, then I removed the items as well. Then I re-entered the two items ('gnome-session-quit --power-off' and 'gnome-terminal --geometry=80x99-0+0') and then configured keystrokes for them ('<Primary><Alt>BackSpace' and '<Primary><Alt>g'). The result is, that whenever I do this, the two keystrokes does NOT come back until I logout and login again. Later I discovered, that as soon as I commit the command "unity- settings-daemon -r --debug", the keystrokes in question disappear. Even later I discovered, that not only the custom bingins go away with committing the debug command, but the redefined normal bindings: I like the web browser (launchers / launc web browser) at '<Primary><Alt>f', but it is not there anymore if I start the debug command. An interesting side-effect is, that when the problem during debug command arise, then the decoration of the Unity control center changes from my usual Radiance back to the default Ambiance. After logging out and back, the decoration and all the redefined or custom bindings come back. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1755106 Title: /org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/ fails to load Status in unity-settings-daemon package in Ubuntu: Confirmed Bug description: $ dconf dump /org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/ [custom1] binding='<Primary><Alt>BackSpace' command='gnome-session-quit --power-off' name='gnome-session-quit --power-off' [custom0] binding='<Primary><Alt>g' command='gnome-terminal --geometry=80x99-0+0' name='gnome-terminal --geometry=80x99-0+0' $ In spite of the above, time to time, not always, but since 18.04 much much more frequently this settings fails to become active just after booting, ... my account is logged in automatically just after boot. If I log out and log in again, then these key bindings work. If I go to the system settings, and define again, then these work again. Earlier, before 18.04 this phenomenon was rare, namely once a week at most. But since 18.04 it is almost guaranteed, not deterministic, but highly probable, that after an initial boot or a warm reboot these key bindings will not work. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-settings-daemon/+bug/1755106/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp