UBUNTU - How to add a missing configuration to Ubuntu 14.04 with xrandr

Hello,
the problem was that, I made a fresh install of Ubuntu 14.04 on a Dell Optiplex 860 , with a AOC e943fws monitor that have a 1360x768 resolution at 60Hz.
The default configuration offers me only 1024x768 or 800x600 resolutions.
I spotted was possible to add the missing resolution with xrandr in this way.

give cvt with resolution and frequency

me@box:~$ cvt 1360 768 60
# 1360x768 59.80 Hz (CVT) hsync: 47.72 kHz; pclk: 84.75 MHz
Modeline "1360x768_60.00"   84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync

Then give xrandr --newmode omitting "Modeline" word on the command
 It gives You no output.


me@box:~$ sudo xrandr --newmode "1360x768_60.00"   84.75  1360 1432 1568 1776  768 771 781 798 -hsync +vsync

 
then add new mode to our current output , for me was VGA1


me@box:~$ sudo xrandr --addmode VGA1 1360x768_60.00



Now giving xrandr I obtain this output with the new resolution listed

me@box:~$ sudo xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 32767 x 32767
VGA1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0*
   800x600        60.3     56.2 
   848x480        60.0 
   640x480        59.9 
   1360x768_60.00   59.8 
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)


Now we can change the resolution


 webstation1@webstation1:~$ sudo xrandr --output VGA1 --mode 1360x768_60.00


And for me that works fine.
At this point You will find the new resolution also in Monitor settings.

Bye