User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:50.0) Gecko/20100101
Firefox/50.0
Build Identifier: 

The computer/display locks up at random intervals running openSUSE Leap 42.2
KDE Plasma (plasmashell 5.8.x).  When this happens, the mouse pointer still
works, but the user is unable to do anything with it.  The keyboard is locked
completely and the only remedy is to do a hard shutdown (forced power down) and
fresh boot.

This problem does not seem to occur at all running GNOME, Cinnamon or Xfce. 
I've eliminated the display manager as the issue because the display also
freezes randomly running KDE Plasma 5.8.3 from LIGHTDM rather than SDDM.

The following additional information is relevant:

  plasmashell 5.5.x on openSUSE Leap 42.1 -- works fine

  plasmashell 5.5.x on Kubuntu 16.04 -- works fine

  plasmashell 5.5.x on Fedora 23 -- works fine

  plasmashell 5.6.x on LinuxMint 18 -- works fine

  plasmashell 5.8.x on openSUSE Leap 42.2 -- screen freezes 

~> plasmashell -v
plasmashell 5.8.3

This is, potentially, a KDE Plasma 5.8.x bug rather than openSUSE per se, but
opening it here under openSUSE Leap 42.2.  Please let me know if this should be
filed directly with the KDE team.

Reproducible: Always

Steps to Reproduce:
1. Run KDE Plasma 5.8.3 under openSUSE Leap 42.2
2. Use computer normally
3. After a seemingly random period of time, the screen freezes and the user
must do a a hard boot
Actual Results:  
See above

Expected Results:  
See above

See above