(up-to-date Sid, intel GM965/GL960 card) Any action that causes the video mode to switch back to tty (ctrl-alt-F1, closing X) gives me a screen that's either blank or contains some garbage pixels, and no more response to input. Switching from 'intel' to 'vesa' drivers removes the problem. Compiling the latest intel driver from git repository does not help. Curiously enough, the hang can sometimes be gotten around by suspending and un-suspending the laptop. This shows that X crashed with a bunch of 'fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0"' errors.
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