I have the same problem.
Running Ubuntu 11.04 (Natty) with the "ubuntu-classic" desktop (gnome) and the nouveau driver.
I also installed the xserver-xorg-video-nouveau (1:0.0.16+git20110323.8378443b-0ubuntu0sarvatt) from the x-edgers ppa but the Screen still crashes (Image is frozen but cursor still follows mouse movements).
I have to reboot the machine.
I have the same problem.
Running Ubuntu 11.04 (Natty) with the "ubuntu-classic" desktop (gnome) and the nouveau driver.
I also installed the xserver- xorg-video- nouveau (1:0.0. 16+git20110323. 8378443b- 0ubuntu0sarvatt ) from the x-edgers ppa but the Screen still crashes (Image is frozen but cursor still follows mouse movements).
I have to reboot the machine.
Any thoughts?