Xrandr

08:54 AM][keegan@localhost:~]#>cvt -v 1280 1024

1. 1280x1024 59.89 Hz (CVT 1.31M4) hsync: 63.67 kHz; pclk: 109.00 MHz

Modeline "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync

xrandr --newmode "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync

xrandr --addmode VGA1 1280x1024_60.00

xrandr --output VGA1 --mode 1280x1024_60.00 --auto --left-of LVDS1

http://www.ubuntugeek.com/how-change-display-resolution-settings-using-xrandr.html