Comment 44 for bug 1553328

In your kernel log I see

[30903.432610] nouveau E[steam[21937]] fail set_domain
[30903.432614] nouveau E[steam[21937]] validating bo list
[30903.432618] nouveau E[steam[21937]] validate: -22

I believe that error should be fixed by the kernel patch at the end of bug #92504. However I don't think that's your main issue. Still, worth giving it a shot.

Separately, some very subtle fence-related issues should be fixed in the soon-to-be-released Mesa 11.0.4 (or mesa's master branch). Again, don't think they're the root cause of your problems, but... wouldn't hurt to try.