gnome-settings-daemon crashed with SIGSEGV in rw_screen_list_outputs()

[ExChem]

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"

expected behavior: gdm comming up without error reporting

using /etc/X11/xorg.conf:

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by failsafeDexconf, using
# values from the debconf database and some overrides to use vesa mode.
#
# You should use dexconf or another such tool for creating a "real" xorg.conf
# For example:
# sudo dpkg-reconfigure -phigh xserver-xorg
Section "Module"
 Load "glx"
 Load "GLcore"
# Load "dri"
 Load "v4l"
EndSection

################################################################
################################################################
### ###
### Server-Section ###
### ###
################################################################
################################################################
Section "ServerLayout"
 Identifier "Default Layout"
 screen 0 "screen1" 0 0
   screen 1 "screen2" RightOf "screen1"
   screen 2 "screen3" RightOf "screen2"
# screen 3 "screen4" RightOf "screen3"
   Option "Xinerama" "On"
 Inputdevice "Generic Keyboard"
 Inputdevice "Configured Mouse"
EndSection

################################################################
################################################################
### ###
### Screen-Section ###
### ###
################################################################
################################################################
#-------------------------------------------------
Section "screen"
 Identifier "screen1"
 Device "device1"
 Monitor "monitor1"
 Defaultdepth 16
 SubSection "Display"
         Modes "1280x1024"
 EndSubSection
EndSection
#-------------------------------------------------
Section "screen"
 Identifier "screen2"
 Device "device2"
 Monitor "monitor2"
 Defaultdepth 16
 SubSection "Display"
         Modes "1280x1024"
 EndSubSection
EndSection
#-------------------------------------------------
Section "screen"
 Identifier "screen3"
 Device "device3"
 Monitor "monitor3"
 Defaultdepth 16
 SubSection "Display"
         Modes "1280x1024"
 EndSubSection
EndSection
#-------------------------------------------------
#Section "screen"
# Identifier "screen4"
# Device "device4"
# Monitor "monitor4"
# Defaultdepth 24
# SubSection "Display"
# Modes "1280x1024"
# EndSubSection
#EndSection

################################################################
################################################################
### ###
### Device-Section ###
### ###
################################################################
################################################################
#-------------------------------------------------
Section "device" #
 Identifier "device1"
 Vendorname "Matrox"
 Boardname "Matrox Millennium G200 QuadHead"
 Busid "PCI:2:0:0"
 Driver "mga"
# Screen 0
        VideoRam 8192
# Option "HWCursor" "0"
# Option "MGASDRAM"
EndSection
#-------------------------------------------------
Section "device" #
 Identifier "device2"
 Vendorname "Matrox"
 Boardname "Matrox Millennium G200 QuadHead"
 Busid "PCI:2:12:0"
 Driver "mga"
# Screen 0
        VideoRam 8192
# Option "HWCursor" "0"
# Option "MGASDRAM"
EndSection
#-------------------------------------------------
Section "device" #
 Identifier "device3"
 Vendorname "Matrox"
 Boardname "Matrox Millennium G200 QuadHead"
 Busid "PCI:2:4:0"
 Driver "mga"
# Screen 0
        VideoRam 8192
# Option "HWCursor" "0"
# Option "MGASDRAM"
EndSection
#-------------------------------------------------
#Section "device" #
# Identifier "device4"
# Vendorname "Matrox"
# Boardname "Matrox Millennium G200 QuadHead"
# Busid "PCI:2:8:0"
# Driver "mga"
## Screen 0
# VideoRam 8192
## Option "HWCursor" "0"
## Option "MGASDRAM"
#EndSection

################################################################
################################################################
### ###
### Monitor-Section ###
### ###
################################################################
################################################################

#-------------------------------------------------
Section "monitor"
 Identifier "monitor1"
 Vendorname "LG Electronics Inc."
 Modelname "LG 2010"
 Option "DPMS"
EndSection
#-------------------------------------------------
Section "monitor"
 Identifier "monitor2"
 Vendorname "LG Electronics Inc."
 Modelname "LG 2010"
 Option "DPMS"
EndSection
#-------------------------------------------------
Section "monitor"
 Identifier "monitor3"
 Vendorname "LG Electronics Inc."
 Modelname "LG 2010"
 Option "DPMS"
EndSection
#-------------------------------------------------
#Section "monitor"
# Identifier "monitor4"
# Vendorname "XEROX"
# Modelname "X19"
# Option "DPMS"
#EndSection

################################################################
################################################################
### ###
### InputDevice-Section ###
### ###
################################################################
################################################################
#---------------------------------------------------------
Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver "kbd"
 Option "CoreKeyboard"
 Option "XkbRules" "xorg"
 Option "XkbModel" "pc105"
 Option "XkbLayout" "de"
 Option "XkbVariant" "ädeDEs1q+wertz"
EndSection
#---------------------------------------------------------
Section "InputDevice"
 Identifier "Configured Mouse"
 Driver "mouse"
 Option "Emulate3Buttons" "true"
EndSection

Section "ServerFlags"
# Option "IgnoreABI" "True"
EndSection

#Section "DRI"
# Mode 0666
#EndSection

ProblemType: Crash
Architecture: i386
Date: Tue Mar 4 00:26:19 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
NonfreeKernelModules: cdrom
Package: gnome-settings-daemon 2.21.91-0ubuntu5
PackageArchitecture: i386
ProcCmdline: gnome-settings-daemon
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: gnome-settings-daemon
StacktraceTop:
 rw_screen_list_outputs ()
 configuration_apply_stored ()
 gsd_xrandr_manager_start ()
 ?? () from /usr/lib/gnome-settings-daemon-2.0/libxrandr.so
 ?? ()
Title: gnome-settings-daemon crashed with SIGSEGV in rw_screen_list_outputs()
Uname: Linux 2.6.24-11-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin netdev plugdev powerdev sambashare scanner video