Comment 22 for bug 1310489

Ok, I commented the "Start on" lines at the top of the /etc/init/gpu-manager.conf file.
This is what I did:

My Laptop has two video cards a Intel Haswell and a Nvidia Quadro K3100M
The laptop was working with the nouveau drivers on the Intel card and that worked OK.
I upgraded the Intel drivers with the latest from the Intel web site and everything still worked OK.
        Intel download site: https://01.org/linuxgraphics/downloads/2014/intelr-graphics-installer-1.0.6-linux
The gpu-manager log file reported that the was a Nvidia card but no xorg.conf file and stopped with "nothing to do"

As soon as I installed the nvidia proprietary drivers the systems dd not work in graphical mode anymore.
It booted on the command line and a popup box appeared reading "The system is running in low graphics mode - You must
configure it yourself". Examining the xserver log file reveals several complaints about the xorg.conf file.
That file is not in correct format and by that the systems doesn't boot graphically.

Modified/commented the first lines of the gpu-manager.conf file
Modified the xorg.conf file and rebooted.

Machine still starts in command line mode (with low graphics popup box).
Examining the xorg.conf file shows that something modified it again and it has a wrong format.

I'm back to zero.