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I have GeForce 210 on Ubuntu 13.10 connected with HDMI to a 29 AOC display. The display can do 2560x1080 resolution, the maximum resolution the video card can provide is 2560x1600.

However, the best I can get is 1920x1080. How can I get 2560x1080?

I have tried to switch the display drivers using Software & Update's Additional Drivers feature, but changing the drivers makes no difference.

The output of xrandr is:

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 8192 x 8192
DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 673mm x 284mm
   1920x1080      60.0*+   59.9     50.0     30.0     60.0     50.0  
   1680x1050      60.0  
   1440x900       59.9  
   1280x1024      75.0     60.0  
   1280x960       60.0  
   1280x720       60.0     59.9     50.0  
   1024x768       75.0     70.1     60.0  
   800x600        75.0     72.2     60.3     56.2  
   720x576        50.0  
   720x480        59.9  
   640x480        75.0     72.8     59.9     59.9  
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