First you need to download and install the Intel drivers:
$ sudo add-apt-repository ppa:glasen/intel-driver
$ sudo apt-get update && sudo apt-get upgrade
Before adding the Device section to the file: /etc/X11/xorg.conf
After restarting X (say: reboot), you should be able to change preset resolutions via Systems > Preferences > Monitors.
You can verify the available resolutions with:
$ xrandr -q
Screen 0: minimum 320 x 200, current 1360 x 768, maximum 2048 x 2048
VGA1 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1360x768 59.8*
1024x768 60.0
800x600 60.3 56.2
848x480 60.0
640x480 59.9 59.9
If you require a seemingly exotic resolution, e.g. 1920x1080 (60Hz), you need to add a extra modeline to X. The modeline parameters can be calculated with the cvt tool:
$ cvt 1920 1080 60
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
Add this new modeline to your X configuration using xrandr:
$ xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
You can check this using xrandr -q again:
$ xrandr -q
Screen 0: minimum 320 x 200, current 1360 x 768, maximum 2048 x 2048
VGA1 connected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1360x768 59.8*
1024x768 60.0
800x600 60.3 56.2
848x480 60.0
640x480 59.9 59.9
1920x1080_60.00 60.0
Finally, add the exotic modeline (VGA1 is the actual output device, as reported by xrandr -q):
$ xrandr --addmode VGA1 1920x1080_60.00