During test of kernel 3.5.0-7.7 (http://packages.qa.ubuntu.com/qatracker/milestones/223/builds/20088/testcases/1306/results/) I had the same problem.
This time the screen went black also when, after rebooting because the screen went black changing to resolution 1440x900, I tried to change from resolution 1280x740 (the one I found after the reboot) to resolution 1366.x768.
During test of kernel 3.5.0-7.7 (http:// packages. qa.ubuntu. com/qatracker/ milestones/ 223/builds/ 20088/testcases /1306/results/) I had the same problem.
This time the screen went black also when, after rebooting because the screen went black changing to resolution 1440x900, I tried to change from resolution 1280x740 (the one I found after the reboot) to resolution 1366.x768.