Graphical hangs, no keyboard, rest of system still active

Submitted by Koz Ross

Assigned to Default DRI bug account

Link to original bug (#106434)

Description

Created attachment 139418
Relevant fragment of dmesg when this occurs

I sometimes (for seemingly no reason at all) have the graphics completely hang on my machine. I lose my keyboard as well, although my machine is still running (I can SSH into it and everything else still works). I can still move the mouse, but nothing visual responds (I can't click on anything, can't change active windows, etc).

Some additional points of interest:

• My DisplayPort monitor blacks out in such a case, while my DVI monitor keeps working (displaying the same still image)
  
• Killing X or my WM has no effect on this once it occurs (only a restart fixes it)
  
• I can't determine if any particular thing triggers it (seems totally arbitrary)
  

I've attached a dmesg fragment from one such incident, as well as other pertinent information. Its mention of AMDGPU is why I reported this bug here.

**Attachment 139418**, "Relevant fragment of dmesg when this occurs":
dmesg-fragment