Public bug reported:
After being logged in as a user, if another user decides to attempt to change
user as guest instead of entering a password, the display will sometimes go
black and fail to respond resulting in no signal to the monitor. The only
known way of fixing the problem is by restarting the computer.
If another display driver such as the ATI driver is used, this error results in
the inability to start X and crashes upon entering the startx command. I
believe that this error is the result of attempting to reset display parameters
prior to bringing the display adapter back online on user change. The result
would be issuing commands to an interface which was not yet available to
receive commands.
Ubuntu Version: 12.04 with proposed updates enabled
The error can be recreated, but I can not seem to generate a program
crash report to submit here.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1032900
Title:
Display crash on user change
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