I want my laptop display to not dim when the device is inactive. However, when I go into GNOME's settings and uncheck the option under Power Saving my choice is disregarded; the screen still dims. Is it being overridden somewhere?
You probably have a conflict between your power profiles and gnome settings.
Do you already have the power profile selector in your gnome panel in the top-right menu? Try switching to balanced or performance and see if it stops.
It looks like you're right - just checked and it only seems to happen when Power Saver is selected in GNOME. Do you know if anything can be done to prevent dimming in this mode?