Whenever I switch to another activity, I’ll get black screen and need to login again. And after login I entered the activity I was trying to switch to.
I have removed my custom activities and reset the default one. Doesn’t help.
Could it be my misconfiguration on the start up script? Where should I look into?
Logically you can’t log in from a black screen… something’s missing here. Did you first try pressing Alt+Space to see if Krunner comes down and restarting your plasma?
Try typing a command in there: killall plasmashell && kstart plasmashell
You can also start up yakauke and try to pull that down on your black screen, or do CTRL+T to get a terminal up.
Next time you switch to a black screen try it (it’ll come up as soon as you start typing ‘killall pl’).