abrt version: 1.1.17
architecture: i686
Attached file: backtrace, 6345 bytes
cmdline: /usr/bin/Xorg :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-2EDYOE/database -nolisten tcp
component: xorg-x11-server
Attached file: coredump, 7241728 bytes
executable: /usr/bin/Xorg
kernel: 2.6.38-0.rc5.git5.1.fc15.i686
package: xorg-x11-server-Xorg-1.9.99.1-4.20101201.fc15
rating: 3
reason: Process /usr/bin/Xorg was killed by signal 11 (SIGSEGV)
release: Fedora release 15 (Lovelock)
time: 1298822761
uid: 0

comment
-----
http://www.smolts.org/client/show/pub_1bd9b7cb-0031-4bdc-9885-ab1540ba820a
Only updates listed above were installed on gfx_test_week_20110221_i386.iso. Without mesa update mutter crashes on startup. Without nouveau update rotated display is not shown properly, but Xorg still crashes. Xorg updated to 1.9.99.1-6 is also crashed with that script.

How to reproduce
-----
0. Download gfx_test_week_20110221_i386.iso and boot
1. Install mesa update from RHBZ 677371
2. Install nouveau update from RHBZ 679505
3. Restart X (C-A-BS), login, open terminal and start rotating display in Displays preferences, or just run script:
for j in `seq 30`; do for i in right inverted left normal; do
xrandr --output DVI-I-1 --rotate $i; sleep 7; done; done

You may need to change "DVI-I-1" to a different value, check `xrandr` output for correct output name.
Script crashes Xorg faster without `sleep 7`.