New answers tagged battery
Problem solved by myself, its UPower daemon, which is automatically started by dbus-daemon, as soon as I start any X session it starts automatically, but closing X session does not stop upower daemon. So logout X session and run sudo service upower stop and problem solved.
What is your laptop model ? and does it have any discrete GPU (i.e. nVIDIA or RADEON) ? About 21.6 W power consumption while only 3 apps are open on Lubuntu is scary, my 15.6" Acer 5830TG laptop never consumes more then 12 W in most condition when running on battery power. Laptop power consumption depends on various thing like display size and brightness , ...
You can install the tool 'powertop'. This will show you how much power various components and processes are using. One of the tabs of powertop will let you toggle various settings from 'bad' to 'good' (in terms of power-usage). This allows you to (for example) disable usb-ports, wifi adapters, webcams and control settings such as disk-spindown timings. The ...
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