$ xrandr --output DIN --off
$ xrandr --output DVI-0 --auto
$ xrandr --output DVI-1 --auto
$ xrandr --output DVI-1 --right-of DVI-0
$ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 8192 x 8192
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
   1280x1024      60.0*+   75.0  
   1280x960       60.0  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1  
DIN connected (normal left inverted right x axis y axis)
   1024x768       59.9  
   800x600        59.9  
   848x480        59.7  
   720x480        59.7  
   640x480        59.4  
DVI-1 connected 1280x1024+1280+0 (normal left inverted right x axis y axis) 380mm x 300mm
   1280x1024      75.0*    60.0  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        72.8     75.0     66.7     60.0  
   720x400        70.1