my laptops screen wont go off when i tell it that i only want to use my external

Asked by Nishan

I currently have a dell xps with a ATI Technologies Inc RV350 [Mobility Radeon 9600 M10. I also have an acer external monitor. I am trying to only use the external monitor. I would like for my laptops screen to be off when i have it tucked away in my keyboard slide out. But thats not the case right now, right now the 2 screens are clones of eachother. please help me turn the laptop screen off... I have been in the forum trying to get this done but cant figure it out. I have provided a link to the thread...

http://ubuntuforums.org/showthread.php?t=797936

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Nishan (nishanm) said :
#1

even when i put in the code

xrandr --output VGA-0 --auto --output LVDS --off

nothing happens at all even though the laptop screen should turn off.

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Kamalakar Agashe (kagashe) said :
#2

Try
xrandr -q
to see how VGA-0 and LVDS are being configured.

Is it necessary to give "--output VGA-0 --auto" to make external monitor work? If it is plugged in before you start the Laptop it should work without this command.

Then try only this command
xrandr --outout LVDS --off

and see if it works.

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Nishan (nishanm) said :
#3

xrandr -q results
nishan@Nishan:~$ xrandr -q
Screen 0: minimum 320 x 200, current 1280 x 768, maximum 1920 x 1200
default connected 1280x768+0+0 0mm x 0mm
   1920x1200 60.0
   1680x1050 60.0
   1600x1200 60.0
   1280x1024 60.0
   1280x800 60.0
   1280x768 60.0*
   1024x768 60.0
   1024x480 60.0
   848x480 60.0
   800x600 60.0
   720x576 60.0
   720x480 60.0
   640x480 60.0
   640x400 60.0
   640x350 60.0
   512x384 60.0
   400x300 60.0
   320x240 60.0
   320x200 60.0
nishan@Nishan:~$

xrandr --outout LVDS --off
nishan@Nishan:~$ xrandr --outout LVDS --off
usage: xrandr [options]
  where options are:
  -display <display> or -d <display>
  -help
  -o <normal,inverted,left,right,0,1,2,3>
            or --orientation <normal,inverted,left,right,0,1,2,3>
  -q or --query
  -s <size>/<width>x<height> or --size <size>/<width>x<height>
  -r <rate> or --rate <rate> or --refresh <rate>
  -v or --version
  -x (reflect in x)
  -y (reflect in y)
  --screen <screen>
  --verbose
  --dryrun
  --prop or --properties
  --fb <width>x<height>
  --fbmm <width>x<height>
  --dpi <dpi>/<output>
  --output <output>
      --auto
      --mode <mode>
      --preferred
      --pos <x>x<y>
      --rate <rate> or --refresh <rate>
      --reflect normal,x,y,xy
      --rotate normal,inverted,left,right
      --left-of <output>
      --right-of <output>
      --above <output>
      --below <output>
      --same-as <output>
      --set <property> <value>
      --off
      --crtc <crtc>
  --newmode <name> <clock MHz>
            <hdisp> <hsync-start> <hsync-end> <htotal>
            <vdisp> <vsync-start> <vsync-end> <vtotal>
            [+HSync] [-HSync] [+VSync] [-VSync]
  --rmmode <name>
  --addmode <output> <name>
  --delmode <output> <name>
nishan@Nishan:~$

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Nishan (nishanm) said :
#4

still doesnt work..

Revision history for this message
Kamalakar Agashe (kagashe) said :
#5

The output of
xrandr -q
is different from what you have posted on Ubuntuforums. Please see on Ubuntuforums and compare them. The output on Ubuntuforums shows VGA-0 connected and LVDS connected as separate entities. If you just give this command the LVDS should get switched off.
xrandr --output LVDS --off

You can afterwards try to get higher resolution on the external monitor through:
xrandr --output VGA-0 --auto

This may or may not bring the LVDS back. If it comes back it can't be switched off because the output of
xrandr -q
does not show VGA-0 and LVDS as separate entities.

Hope you understand.

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