I edited my .dmrc to switch to Gnome 3, and Gnome displays the same "instantly go into power-saving mode" behavior. And if I switch to a different virtual terminal and back, I see a flash of the Gnome 3 desktop before the monitor shuts itself off.
So that's three things that instantly power off the screen: lightdm, gdm, and gnome. The only thing so far that doesn't is Unity.
In case it's relevant, the NUC is hooked up to a Dell U3014 monitor, via a Monoprice mini-HDMI-to-DMI cable.
I edited my .dmrc to switch to Gnome 3, and Gnome displays the same "instantly go into power-saving mode" behavior. And if I switch to a different virtual terminal and back, I see a flash of the Gnome 3 desktop before the monitor shuts itself off.
So that's three things that instantly power off the screen: lightdm, gdm, and gnome. The only thing so far that doesn't is Unity.
In case it's relevant, the NUC is hooked up to a Dell U3014 monitor, via a Monoprice mini-HDMI-to-DMI cable.