I finally figured it out. I had to add some extra lines to the xorg.conf. For people reading this topic and who have similar problems (and zero experience with X), here are some links:
That should definitely get you started
Here is my final xorg.conf:
Code:Section "ServerLayout" Identifier "aticonfig Layout" Screen 0 "aticonfig-Screen[0]-0" 0 0 Option "AutoAddDevices" "false" EndSection Section "Module" EndSection Section "InputDevice" Identifier "Mouse0" Driver "logitech" Option "Protocol" "auto" Option "Device" "/dev/input/mice" Option "ZAxisMapping" "4 5 6 7" EndSection Section "Monitor" Identifier "Configured Monitor" EndSection Section "Monitor" Identifier "aticonfig-Monitor[0]-0" Option "VendorName" "ATI Proprietary Driver" Option "ModelName" "Generic Autodetecting Monitor" Option "DPMS" "true" EndSection Section "Device" Identifier "Configured Video Device" EndSection Section "Device" Identifier "aticonfig-Device[0]-0" Driver "fglrx" BusID "PCI:1:0:0" EndSection Section "Screen" Identifier "Default Screen" Device "Configured Video Device" Monitor "Configured Monitor" EndSection Section "Screen" Identifier "aticonfig-Screen[0]-0" Device "aticonfig-Device[0]-0" Monitor "aticonfig-Monitor[0]-0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x1024" EndSubSection SubSection "Display" Viewport 0 0 Depth 16 Modes "1280x1024" EndSubSection SubSection "Display" Viewport 0 0 Depth 8 Modes "1280x1024" EndSubSection EndSection




