I've got a Toshiba C650-19T with an i3 and the same problem.
I've tried installing kernel 2.3.36 with no joy. I've also tried installing xserver-xorg-video-intel 2:2.13.0 by adding "http://ppa.launchpad.net/glasen/intel-driver/ubuntu maverick main" to my sources, but still no change.
I've got a Toshiba C650-19T with an i3 and the same problem.
I've tried installing kernel 2.3.36 with no joy. I've also tried installing xserver- xorg-video- intel 2:2.13.0 by adding "http:// ppa.launchpad. net/glasen/ intel-driver/ ubuntu maverick main" to my sources, but still no change.