Created attachment 107936 [details]
Kernel Log

This is the version of software that I am running:

extra/mesa-dri 10.3.1-1
extra/xf86-video-nouveau 1.0.11-2
core/linux 3.16.4-1
extra/libdrm 2.4.58-1

The system has an integrated ATI GPU onboard which is not used and a PCIe
Geforce GT730 which is used in a dual head setup.

Occasionally, X will freeze during normal activity (no 3d, no video playback,
just some terminals)

Sometimes the mouse cursor is still movable for a few seconds, afterwards,
graphics is completely frozen up, the system is usually still pingable though.