Hi, Dell Latitude D830; Debian 7 "Wheezy" 64-bit running as a CLI; PowerTOP 2.0 (latest version available for Debian's Stable branch) I use this laptop for some basic home server duties, and the screen is off most of the time through the use of the "vbetool dpms off" command. However, my GPU still displays as 100% usage at all times in PowerTOP's Device Stats tab, even with all Tunables set to "Good". I occasionally need to directly access the laptop using its built-in keyboard, say if I screw up my SSH connection somehow, and during boot when I need to enter some LUKS passwords, so the display needs to be accessible at those times. Other than that, the display is largely superfluous, and is switched off 47 out of 48 hours. Is there anything I can do to minimise the GPU's power draw during its 47 idle hours?