Catalyst 8.5: Resolution messed up, but only at login

[Game_boy]

I have just installed Catalyst 8.5 on Ubuntu 8.04 using these instructions:

http://wiki.cchtml.com/index.php/Ubuntu_Hardy_Installation_Guide#Method_2:_Manual_Method_.28installing_Catalyst_8.5.29

My resolution is messed up (stretched in one direction with black borders and graphical corruption) at the login screen only, but before and after that it is fine.

This didn't occur with Catalyst 8.3.

Ubuntu 8.04 x86 (32-bit) with ATI Radeon X1950PRO

Here is my xorg.conf:

--

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "aticonfig-Screen[0]" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Emulate3Buttons" "true"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[0]"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]"
Driver "fglrx"
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]"
Device "aticonfig-Device[0]"
Monitor "aticonfig-Monitor[0]"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

[nasser]

^^^^^
Me too

My display say: "Mode not supported"