Created attachment 46260 Xorg.0.log
Thanks – option "RenderAccel" "off" seems to solve the problem, I tested this for some hours now and didn't see any corruptions, swap-partition usage looks normal… I'll let you know if I come across any corruptions again.
Regarding the problem shown in my first screenshot it seems like it has nothing to do with my graphics card – see https://bugs.launchpad.net/ubuntu/+source/light-themes/+bug/751226.
Created attachment 46260
Xorg.0.log
Thanks – option "RenderAccel" "off" seems to solve the problem, I tested this for some hours now and didn't see any corruptions, swap-partition usage looks normal… I'll let you know if I come across any corruptions again.
Regarding the problem shown in my first screenshot it seems like it has nothing to do with my graphics card – see https:/ /bugs.launchpad .net/ubuntu/ +source/ light-themes/ +bug/751226.