Bug#444433: Upgrading to lenny kills working X system

[matthew@vernshome.net]

I use xinerama for multi-head displays (multiple video cards, one of which is
i810). Upgrading to Lenny grabs the new video-intel and the upgrade appears
smooth.

Then I reboot the computer, and after X attempts to start (screen flickering and
such) the system gets locked up. No 'X keeps crashing', no switching to
terminal. At that point, I have to hard reset the computer and boot to single
user mode.

This is very, very bad. The upgrade should reconfigure X or at least give a
warning. If the new video-intel is not compatible with xinerama, then it should
detect the setting and exit X cleanly rather than locking up the computer.

--Matthew Vernon
sunergos@vernshome.net