Created attachment 73815 [details]
messages

During normal usage, xorg crashes in various ways. In dmesg and Xorg.0.log i
didn't find anything. In /var/log/messages, i did found various messages from
nouveau. I'll attach the file. This happens often: xorg restarts, or just
temprarily loses the "display" function, or artefacts are shown whenever i lock
gnome. 

Roy Spliet says that nv_wo32() has a problem, on 32-bit version.

From #nouveau: 

<RSpliet> nouveau_gpuobj_create:134 says nv_wo32(gpuobj, i, 0x00000000);
<RSpliet> the second parameter is supposed to be 64-bit, but i is 32-bits

Hopefully this will be fixed soon. Most of my family computers have NVIDIA
video cards and all that were migrated to Fedora 18 have these kinds of
problems :)