Did your screen freeze or did it kick you back to the login prompt? I have had a random issue of waking from suspend and then after a minute or 2 getting kicked out to the login prompt. I have a similar backtrace in my /var/logXorg.0.log.old file.
Fom me this happening with a Thinkpad T520 with Intel graphics. I see you have AMD tagged, so I don't match with you there.
Did your screen freeze or did it kick you back to the login prompt? I have had a random issue of waking from suspend and then after a minute or 2 getting kicked out to the login prompt. I have a similar backtrace in my /var/logXorg. 0.log.old file.
Fom me this happening with a Thinkpad T520 with Intel graphics. I see you have AMD tagged, so I don't match with you there.
I asked a "question" on launchpad here:
https:/ /answers. launchpad. net/ubuntu/ +source/ xorg/+question/ 203802
iveand