Ubuntu
xserver-xorg-video-intel package

  1. Bug #355508
  2. Comment #5

Comment 5 for bug 355508

Revision history for this message
Peter T Hayward (energonic) wrote : Re: corrupt login screen and lockup during login when using desktop effects

Further evidence -
If the machine suspends itself after 20 mins I resume by pressing power button.
This presents a login that looks perfectly normal, no screen corruption, no lock up.

However, if I force a logout the graphics screen goes and the screen hangs with text showing

/dev/sda
setting advanced Power Management level to 0xfe (254)

All I can do is to switch to tty1 and restart kdm; then I get a normal login screen.

In summary:
The corrupt login screen and graphics hang only occurs on initial login when that tty is on screen.
Other logins seem to behave normally.
A forced logout fails to get back to the login screen.