Increasing linux display resolution via xrandr command line
From thelinuxwiki
displaying available / detected video modes
performed on lenovo laptop running LMDE
$ xrandr Screen 0: minimum 320 x 200, current 1152 x 864, maximum 8192 x 8192 LVDS1 connected 1152x864+0+0 (normal left inverted right x axis y axis) 303mm x 189mm 1440x900 60.0 + 59.9 50.0 1360x768 59.8 60.0 1152x864 60.0* 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 connected 1152x864+0+0 (normal left inverted right x axis y axis) 367mm x 275mm 1600x1200 60.0 + 1280x1024 75.0 60.0 1152x864 75.0* 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 DVI1 connected 1152x864+0+0 (normal left inverted right x axis y axis) 367mm x 275mm 1600x1200 60.0 + 1280x1024 75.0 60.0 1152x864 75.0* 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 TV1 unknown connection (normal left inverted right x axis y axis) 848x480 30.0 + 640x480 30.0 + 1024x768 30.0 800x600 30.0
$ xrandr --output DVI1 --mode 1600x1200
setting up dual monitors example (on aptosid with xranr 1.3)
xrandr --output HDMI2 --mode 1600x1200 xrandr --output HDMI2 --mode 1600x1200 --right-of VGA
ERROR: xrandr: cannot find crtc for output DVI1
to solve the above error, I performed the following
xrandr --output TV1 --off xrandr --output LVDS1 --off xrandr --output VGA1 --off xrandr --output DVI1 --mode 1600x1200
then...worked and ran 1600x1200 successfully :)
taken from useful link http://fluxcoil.net/doku.php/hardwarerelated/thinkpad_x200
excerp: With 2.6.31/2.6.32 this works using just 'xrandr –output VGA1 –mode 1024×768'. With 2.6.30 i just get 'xrandr: cannot find crtc for output VGA1' from the command thou. xrandr without option here detects all outputs as connected. The VGA-output can then only be used after manually deactivating the other outputs:
