Comment 9 for bug 1005545

Our School District is experiencing the same problem with two. We have a few different types of Nvidia graphics and it happens on two that I tested:
00:0d.0 VGA compatible controller: NVIDIA Corporation C61 [GeForce 6150SE nForce 430] (rev a2)
02:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)

Escape key does remove the black screen - but it is annoying. Many students/teachers just press the power button on the computer thinking that it is locked up.