Comment 4 for bug 1451798

I'm working on a Panasonic Toughbook CF-C1 that also has this issue, though I can only rotate the display manually on this model (not sure by other thinkpad comments if it is implying an automatic screen rotation, perhaps by gyroscope, so I wanted to be sure to make the distinction just in case). Rotating it to normal, clockwise, counterclockwise gives no issue, 180 flip causes same black screen problem. Ctrl+Alt+F1 followed by Ctrl+Alt+F7 does fix this for me, though I'll note that switching back to Normal rotation after being on 180 rotation will cause the same black screen problem again, warranting another Ctrl+Alt+... etc. to return it to normal.

Using Ubuntu 14.04 on a 64-bit system.