Comment 7 for bug 1158689

This may be fixed in v3.9-rc4 with the following commit:

cf9a625 - Merge branch 'drm-nouveau-fixes-3.9' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-next

Can you the rc4 kernel to see if it resolves this bug:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc4-raring/