Xinerama and kubuntu

[Bas Spitters]

Dear list,

I have the following problem using Xinerama with kubuntu (dapper. kde 3.5.1).

I use my laptop with an external monitor. Xinerama seems to work fine when kdm 
is started. However, when I start kde, it crashes after some time and I come 
back into the login screen of kdm.

When trying to correct this problem I tried the following:
* When I create a fresh user and try the above, I still get the problem 
described above. So it does not seem to be caused by my init-files.
* When I log into a failsafe session and start ksmserver everything seems to 
work fine.

Where should I look? The logs don't seem to provide any information?

I have attached the xorg.conf file.

Thanks for your help.

Bas
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# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands:
#
#   cp /etc/X11/xorg.conf /etc/X11/xorg.conf.custom
#   sudo sh -c 'md5sum /etc/X11/xorg.conf >/var/lib/xfree86/xorg.conf.md5sum'
#   sudo dpkg-reconfigure xserver-xorg

Section "Files"
	FontPath	"/usr/lib/X11/fonts/misc"
	FontPath	"/usr/lib/X11/fonts/cyrillic"
	FontPath	"/usr/lib/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/Type1"
	FontPath	"/usr/lib/X11/fonts/CID"
	FontPath	"/usr/lib/X11/fonts/100dpi"
	FontPath	"/usr/lib/X11/fonts/75dpi"
        # paths to defoma fonts
	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
	FontPath	"/var/lib/defoma/x-ttcidfont-conf.d/dirs/CID"
EndSection

Section "Module"
        Load    "bitmap"
        Load    "dbe"
        Load    "ddc"
        Load    "extmod"
        Load    "freetype"
        Load    "glx"
        Load    "int10"
        Load    "record"
        Load    "type1"
        Load    "vbe"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"ZAxisMapping"		"4 5"
       Option      "XAxisMapping"         "6 7"
EndSection

Section "Device"
	Identifier	"Intel0"
	Driver		"i810"
	Option		"VBERestore" "yes"
	Option		"MonitorLayout" "CRT,LFP"
	BusID		"PCI:0:2:0"
	Option		"AGPMode" "4"
	Screen		0
EndSection

Section "Device"
	Identifier	"Intel1"
	Driver		"i810"
	Option		"VBERestore" "no"
	Option		"MonitorLayout" "CRT,LFP"
	Option		"DevicePresence"	"yes"
	BusID		"PCI:0:2:0"
	Option		"AGPMode" "4"
	Screen		1
EndSection

Section "Monitor"
	Identifier	"LCD"
        HorizSync       28-49
        VertRefresh     43-72
	Option		"DPMS"
EndSection

Section "Monitor"
        Identifier      "Acer AL2021"
        HorizSync       32-80
        VertRefresh     56-75
        Option          "DPMS"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "Intel1"
        Monitor         "Acer AL2021"
        DefaultDepth    24
        SubSection "Display"
                Depth           1
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           4
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           8
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           15
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Depth           24
                Modes           "1600x1200" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
EndSection

Section "Screen"
	Identifier	"LCD"
	Device		"Intel0"
	Monitor		"LCD"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1024x768"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1024x768"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1024x768"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1024x768"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1024x768"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1024x768"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		0 "LCD"
	Screen		1 "Default Screen" RightOf "LCD"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
EndSection

Section "ServerFlags"
  Option "Xinerama" "true"
EndSection