Created attachment 357310 [details]
Strace of Xorg from command line.

Description of problem:

[root@lhs X11]# /usr/bin/Xorg

X.Org X Server 1.6.1.901 (1.6.2 RC 1)
Release Date: 2009-5-8
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.18-128.1.6.el5 i686
Current Operating System: Linux lhs.localhostservers 2.6.29.6-217.2.3.fc11.i586 #1 SMP Wed Jul 29 15:46:46 EDT 2009 i686
Kernel command line: ro root=LABEL=/
Build Date: 18 May 2009  02:47:59PM
Build ID: xorg-x11-server 1.6.1.901-1.fc11
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Aug 12 22:55:46 2009
(==) Using config file: "/etc/X11/xorg.conf"
/usr/bin/Xorg: symbol lookup error: /usr/lib/xorg/modules/drivers//radeon_drv.so: undefined symbol: DRIOpenDRMMaster



[root@lhs X11]# cat /etc/X11/xorg.conf
# Xorg configuration created by system-config-display

Section "ServerLayout"
        Identifier     "Default Layout"
        Screen      0  "Screen0" 0 0
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"

# keyboard added by rhpxl
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbModel" "pc105+inet"
        Option      "XkbLayout" "us"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "radeon"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

[root@lhs X11]# rpm -qf /usr/lib/xorg/modules/drivers/radeon_drv.so
xorg-x11-drv-ati-6.12.2-14.fc11.i586
[root@lhs X11]#


[root@lhs f11]# strings /usr/lib/xorg/modules/drivers/radeon_drv.so |grep DRIOpenDRMMaster
DRIOpenDRMMaster
[root@lhs f11]#


[root@lhs f11]# rpm -qf /usr/bin/Xorg
xorg-x11-server-Xorg-1.6.1.901-1.fc11.i586
[root@lhs f11]#

This error shows up regardless of the DISPLAYMANAGER used within /etc/X11/prefdm and /etc/sysconfig/desktop.

Version-Release number of selected component (if applicable):
xorg-x11-server-Xorg-1.6.1.901-1.fc11.i586
xorg-x11-drv-ati-6.12.2-14.fc11.i586


How reproducible:
Always.  Regardless of whether KDM, GDM, XDM or WDM display managers are used.  This follows a recent yum upgrade I did between August 8th and August 9th.

Steps to Reproduce:
1. Boot up the computer.
2. Screen goes blank and have to ssh into machine remotely.
3. Keyboard & mouse becomes unusable.
4. No EE or WW errors in Xorg.0.log.
  
Actual results:
System doesn't finish booting.

Expected results:
System booting to Display Manager

Additional info:
Attached are strace and ltrace files.  Perhaps they can shed more information.