I am using Centos 6.3 with two screens :
screen A : 1280x1024 screen B : 1680x1050
Screen A is the main screen, and screen B an extension. The problem is, screen A should accept a virtual resolution of 1280x1050 instead of 1280x1024.
With only one screen connected to the PC, I run on a terminal :
$ xrandr --fb 1280x1050 --output VGA1 --mode 1280x1024 --panning 1280x1050
And it works, I have my new virtual resolution and I can access the masked parts touching the edge of the screen.
The problem came with two screens. I want like before, to enlarge screen A without touching the resolution of screen B, but the command does not work and I don't know how to do. I tested with
$ xrandr --fb <NEW_RES_WITH_TWO_SCREENS>
but It makes one big same screen on the two monitors. I read that I should modify the xorg.conf file but it seems that this file does not exist on /etc/X11... when I want to create one :
$ Xorg -configure
I have an error..
Fatal server error : Server is already active for display 0, if this server is no longer running, remove /tmp/.X0-lock and start again
context : I have to run on screen A an appli, which man/machine interface resolution is larger than the screen resolution. And I can't modify the code.
Any help would be welcome