In Ubuntu 16.04 I had to reboot and after logging in there was no GUI, just the background color of my desktop and mouse. I could not open any applications except System Monitor. I tried to end a couple of processes related to unity in the hope that menu etc. would shop up again. No luck, so I did a shutdown with the power button.
After reboot, everything seemed to be OK, except that I couldn't switch workspace with shortcuts (Ctrl+Alt+Arrow keys) - so, that's my problem now.
- Changing the shortcuts in keyboard settings
- unity --reset
- gsettings reset-recursively (different stuff) link
Other shortcuts related aren't working either, like Super+Home to switch to Workspace 1. I can switch using Super+S. When I pull up the shortcut list holding Super down 2 sec. I can see that the shortcut for switching (Ctrl+Alt+Cursor Keys) are not mentioned... Other shortcuts seem to work. Using the mouse to snap a window to the maximum are not working either (double-click works).
Maybe I stopped something that didn't start again?