Comment 0 for bug 1902336

     Problems: Choosing SWITCH USER option causing system freeze on post-login desktop session.
Not sure these are distro specific or KDE specific. I'm not pro.

 Description:
There are 3 events.
Event-1
 Choose 'SWITCH USER' from an active desktop session(https://ibb.co/V2M6gdf). Get login screen & provide password. After 5 min (in my case) you will enter & get the desktop session is frozen.

Event-2
 Step-1: Within a desktop session click Sleep.

 Step-2: Wake up the system from suspension but dont login there. Click 'SWITCH USER' option on that sceen(https://ibb.co/KVsTgSD). On next screen, input password in Login box. After 5 min you will enter & get the desktop session is frozen.

Event-3

 Step-1: Within a desktop session click Sleep (additionally, one can suspend the session keeping any desktop applications e.g. Firefox running https://ibb.co/Cw92FdD).

 Step-2: Wake up the system from suspension but dont login there. Click 'SWITCH USER' option on that screen. On next screen click Sleep.

 Step-3: Wake up the system from suspension & try to login, input your password in the box. Next, login screen freezes/halts for approx 5 min (in my case) & thereafter gets into the Desktop session. The whole Desktop is frozen. Clicking on the wheel / pressing Windows key or clicking any other icons dont work. you can only hover mouse pointer.

     Access tty1 with Ctrl+Alt+F1 (if suspended with Firefox as in step-1, on tty1 at first you will get Firefox window without a title bar https://ibb.co/GvhxwCz. Login appears after quitting the Firefox). Once you input password there it freezes too.

Got 2 crash reports. @desktop https://pastebin.com/RTpGGSDX https://ibb.co/X3WV9zC
@tty1 https://pastebin.com/A4W3SvQg https://ibb.co/0m3Z0gh