Comment # 13 on bug 74062 from Mario Barrera

(In reply to comment #12)
> Wild guess - perhaps it's LTCG related ?
> 
> You can easily check if that's the case my setting compressed = false in
> nvc0_miptree.c:nvc0_miptree_create.

Seems like, I just did what you suggested and all artifacts are gone now (just
had to restart any OpenGL program after installing). So I confirm this
workaround works for me.
Thanks Emil.