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How can I add more screen resolutions to Thinkpad (W510) LCD? I want to clone the external display which has a bit different sets of resolutions. The best resolution that is common to both displays is quite low.

In the past I used to have an ATI card so I used xrandr to add a new resolution, but somehow it does not work for my new machine which uses nVidia.

hints anyone ?

I'm using a very simple (default) xorg.conf file:

Section "Screen"
    Identifier  "Default Screen"
    DefaultDepth    24

Section "Module"
    Load    "glx"

Section "Device"
    Identifier  "Default Device"
    Driver  "nvidia"
    Option  "NoLogo"    "True"
share|improve this question

Have tried System -> Administration -> Addition Drivers this will also install custom software for Nvidia graphics cards.

Under the screen section in xorg.conf try adding:

Section "Screen"
    SubSection     "Display"
        Depth       24
        Virtual     xdim ydim #your resolution x, y
share|improve this answer
did that already. I do have nvidia-settings app. but I can't add new resolution (1600x1200). – Yonatan Maman Mar 27 '11 at 12:15
@Yonatan you can define it manualy, can you send an output of your xorg.conf – topless Mar 27 '11 at 12:28
I'm using a very simple (default) xorg.conf (see my questions for its content) – Yonatan Maman Mar 27 '11 at 13:18
@Yonatan let me know if the additional entry had any result. – topless Mar 27 '11 at 13:36
my LCD (thikpad) has 1600x900 while my external CRT display has 1600x1200. I wish both of them to clone same screen of 1600x1200. is that possible ? I don't want to have panning or something like that – Yonatan Maman Mar 27 '11 at 13:47

I think you want something like this:

 Example 11.1. Screen Section of the File /etc/X11/xorg.conf

Section "Screen" 
  DefaultDepth 16 
  SubSection "Display" 
    Depth 16
    Modes "1152x864" "1024x768" "800x600" 
    Virtual 1152x864 
  SubSection "Display" 
    Depth 24 Modes "1280x1024" 
  SubSection "Display" 
    Depth 32 Modes "640x480" 
  SubSection "Display" 
    Depth 8 Modes "1280x1024" 
  Device "Device[0]" 
  Identifier "Screen[0]" 
  Monitor "Monitor[0]" 

Found here:
I once was told to be careful not to set a higher resolution than monitor capability since that could cause hardware damage.

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