Description of problem:
On default installation of Fedora Core 7 (from LiveCD) in a computer with
ProSavage chipset, the X server always crashes on exit and leaves the monitor
unusable, with no text or anything, and LEDs blinking. I know it is a crash
because if I reboot the computer and carefully configure it to remove rhgb and
select text-mode boot (3) (both as kernel parameters), I can recover the X log
before being overwritten by graphical login.

If I manually switch the X server to a text console with Ctrl-Alt-F[1-6] and
then killall Xorg, the crash does not occur.

Computer itself is not hung, because Ctrl-Alt-Delete is handled normally and
allows to reboot cleanly, even after the crash. Also, in GNOME, the menu option
to shut down the computer also runs normally (even with the screen blank).

Version-Release number of selected component (if applicable):


How reproducible: Always

Steps to Reproduce:
1. On hardware config. with ProSavage4 videocard/chipset, start X server
2. Attempt to shut down X session from within X itself.
  
Actual results:
X server crashes, backtrace reported in Xorg.0.log, monitor left in undefined
state with no output at all (black screen).

Expected results:
X server cleans up correctly and returns to normal text mode.

Additional info:

The bug report at https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=221503
seems very similar to my case. However, there is no mention of a crash, only of
the blank screen. Maybe this is a duplicate and the other bug reveals a crash in
the X log if examined properly.