Fix wrong resolution on Samsung SyncMaster B1930.

update_resolution.sh

#!/usr/bin/env bash

# A workaround to fix wrong resolution on Samsung SyncMaster B1930.
# Samsung SyncMaster B1930 has a default resolution of 1360x768 but
# it appears in Ubuntu that the monitor is Unknown and using 1024x768
# output mode.
# http://bit.ly/1lyxcvH

# Generate the modeline using cvt
if hash cvt 2>/dev/null; then
  cvt 1366 768 60
else
  echo "- CVT is not in your system."
  exit
fi

if hash xrandr 2>/dev/null; then
  # Create the new modeline (with the values from the output of cvt)
  xrandr --newmode "1360x768_59.8"  84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync

  # Add the above created modeline:
  xrandr --addmode VGA1 1360x768_59.8

  # Set the added mode to VGA1
  xrandr --output VGA1 --mode 1360x768_59.8
else
  echo "- Xrandr is not in your system."
  exit
fi