View Full Version : [xubuntu] Display detection and resolution problems

July 4th, 2010, 06:19 PM
Hi guys. I'm fairly new to linux. I've just installed the latest Xubuntu on an older laptop with ATI RADEON XPRESS 200M graphics. The laptop has a damaged display hinge and so I've attached a BENQ 24" LCD monitor to it via d-sub connection.

I'm currently restricted to using 1024x768 max resolution on both displays as I'm unable to choose separate resolutions for each display. Xfce Settings Manager only shows laptop display and does not show the attached monitor for some reason.

Max resolution for laptop display should be 1280x800 and for attached display should be 1920x1200. Using xrandr command at terminal I get the following:

Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096
VGA-0 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1360x768 59.8
1024x768 60.0*
800x600 60.3 56.2
848x480 60.0
640x480 59.9 59.9
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 289mm x 21mm
1280x800 60.1 +
1280x720 59.9
1152x768 59.8
1024x768 59.9*
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
S-video disconnected (normal left inverted right x axis y axis)

This is as far as I got. I don't know what to do next. Please help. Many thanks.

Meneer Jansen
July 4th, 2010, 07:55 PM
xrandr -d 0 -s 1280x800Will (probably ;)) set one of your displays to 1280x800 then you're left with the task of setting up /etc/X11/xorg.conf so that the other one can be set to 1920x1200.

I don't have two displays so I do not know ecactly how to to that. And I think it depends on your video card. What vid.crd. do you have?

This is my /etc/X11/xorg.conf for inspiration:

Section "ServerFlags"
Option "AllowMouseOpenFail"

Section "Module"
Load "glx"
Load "dbe"
Load "v4l"
Load "freetype"
Load "type1"
Load "extmod"

Section "InputDevice"
Driver "kbd"
Identifier "Keyboard[0]"
Option "Protocol" "Standard"
Option "XkbLayout" "us"
Option "XkbModel" "pc104"
Option "XkbRules" "xfree86"

Section "InputDevice"
Driver "mouse"
Identifier "Mouse[1]"
Option "Buttons" "7"
Option "Device" "/dev/input/mice"
Option "Name" "ImExPS/2 Logitech Explorer Mouse"
Option "Protocol" "explorerps/2"
Option "Vendor" "Sysp"
Option "ZAxisMapping" "4 5"

Section "Monitor"
Identifier "Monitor[0]"
ModelName "Generic Monitor"
Option "DPMS"
HorizSync 30-70
VertRefresh 50-160

Section "Screen"
Identifier "Screen[0]"
Device "Device[0]"
Monitor "Monitor[0]"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "800x600" "1280x960" "1280x1024" "1280x800" "1152x864" "1280x768" "1024x768" "768x576" "640x480"
Virtual 1280 960
SubSection "Display"
Depth 16
Modes "800x600" "1280x960" "1280x1024" "1280x800" "1152x864" "1280x768" "1024x768" "768x576" "640x480"
#Virtual screensize. Beware: physical screen size cannot be larger!
Virtual 1280 960

Section "Device"
Identifier "Device[0]"
Option "NoLogo" "True"
BoardName "GeForce2 MX/MX 400"
BusID "1:0:0"
Driver "nvidia"
Option "CIOverlay"
Option "usevnc" "no"
Option "TVStandard" "PAL"
Option "TVOutFormat" "PAL"
#Option "NvAGP" "2"
#Option "NvAGP" "0"
#Option "NvAGP" "3"
#Option "NvAGP" "1"
Screen 0
VendorName "NVidia"
#For Compiz-Fusion!
Option "AddARGBGLXVisuals" "True"
Option "DisableGLXRootClipping" "True"

Section "ServerLayout"
Identifier "Layout[all]"
InputDevice "Keyboard[0]" "CoreKeyboard"
InputDevice "Mouse[1]" "CorePointer"
Option "Clone" "off"
Option "Xinerama" "off"
Screen "Screen[0]"

Section "DRI"
Group "video"
Mode 0660

Section "Extensions"
#For Compiz!
Option "Composite" "Enable"
P.S. Why do you use Xubuntu and not the full blown Ubuntu? Considering the fact that you've got quite a hefty monitor, my guess is that you've got a computer of no more than 3 years old (i.e. "hefty"). No need for the lightweight Xubuntu....