I have recently purchased a new discrete GPU and have to configure the XServer. In a forum I found the advise first to back-up the config-file like that:
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.bak
but it just puts out the error: file or directory not found
So if I cannot back-up the file how should I open and configure it? Please help!
I am using Ubuntu 14.04 64-Bit, with an AMD Kaveri-APU with 16GB RAM. The GPU I want to get to work in my system is the AMD R9-280.