Created attachment 522194 [details]
Description of problem: Rotating display usuallys work for the first time (not always). After second rotation I get black screen.
Steps to Reproduce:
1. Open gnome-control-center display
2. Select rotation; hit apply; cancel changes
3. Select another rotation, hit apply
Screen goes black.
Everything should work fine.
Created attachment 522195 [details]
What version of xorg-x11-drv-nouveau do you have installed?
A bug similar to what you reported should have been fixed by this build: http://koji.fedoraproject.org/koji/buildinfo?buildID=260001
It was testday ISO (running on USB stick) - 0.0.16-26.
After update and restarting X everything works fine (even shell started working - no more fallback mode).
Great job! :)