Created attachment 120523 [details]
config-xrandr script

For some reasons I wrote a script that configures my dual screen with Xrandr
and Nouveau, that I manually launch with the command line (see attached
"config-xrandr" file).

All this worked perfectly until an update of Xorg and Nouveau, when it totally
fails to configure my dual screen and the display is completely broken, as you
can see on this photo: http://i.imgur.com/yyAqHZI.jpg

I took a screenshot: http://i.imgur.com/WkbXCPC.png and saw that the size of
the left screen (the external) and the position of the right screen (the
internal) were not correct.