Black screen after starting KDE plasma session

Project:Linux software
Component:Documentation
Category:bug report
Priority:normal
Assigned:Unassigned
Status:active
Related pages:#5416: X.org Server
Tags:Black screen, ksmserver, X.org server
Description

In KDE Plasma 5, I started a new session and while the session was not completely loaded, I start to tab into another activity, but got a completely black screen, with only the white mouse pointer that I still could move on it.

I went into a TTY console and did:
ps aux | grep X
and kill the pid of the X process.
I was immediately brought back to the session login screen (sddm).
I logged in again and I saw an X window with the mention:
"Could not start ksmserver. Check your installation".

Comments

#1

Right after posting the above comment, I clicked OK on the dialog with "Could not start ksmserver. Check your installation" and the session crashed straight away, bringing me back again to a sddm session login screen.