I have a desktop machine, a bit old Intel Core 2 4400 (64bit), with nVidia GeForce 7900, two Iiyamas, one 2403, one 2202.
The problem is that everything works fine under Live version -- the display applet sees both monitors and is able to recognise them and sets the resolution properly. Then after installation the display applet cannot recognise the configuration anymore -- it says it is a single 'Laptop' display with screen resolution up to 1280x768 or something.
Deleting the xorg.conf helps only a little -- one can set the proper 1920x1200 resolution, but that's all -- 'display' applet still see only the single 'Laptop' display.
I'd like to copy the Live version configuration but I am not aware how to find out the differences between both configurations --
My question is how to check which package is installed and how to check where to find its config files to copy?