Not sure where to go with this |Dell Lattitude E6420 ATG with a fresh Waldorf install, on battery power the screen is WAAAAY dim compared to when on AC power. And I don't like it.What I've done so far:1. Started laptop on 100% battery power - noticed dim screen2.
Please help. I'm using Ubuntu Gnome 14.04LTS, I need to tweak my Brightness Display to consume long battery life. I want to have 50% Brightness Display when I'm Unplug and 100% Brightness Display when I'm on Plug , However when I go to system settings-Brightness/lock, I do only have limited options to choose. The same with tweak tool I got limited setting to do for power management.