Comment 13 for bug 259156

If the NVIDIA driver is not explicitly enabled in your xorg.conf, then Xorg will not load it. That error you see is because there is no compatible NVIDIA driver found (because it isn't loaded). Your Xorg log file from the attempt when you ran with the NVIDIA driver shows that the driver loading ok but can't read the EDID for your display.

Your logs also show that the ACPI daemon on your machine isn't running, although I don't know what effect that would have or whether it is contributing to your problem:

(WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)

Could you please try to run with the default xorg.conf. To recreate this, run the following in a terminal:

sudo dpkg-reconfigure xserver-xorg

This will create the default stripped down xorg.conf without all the modelines. Could you also attach your /var/log/syslog as well please?

Thanks