[nomel]

> And my laptop battery runs for 8 hours

I imagine your display is almost entirely black for the majority of the time, with your (most probably) LCD backlight blasting away, trying its hardest to get a few thousandths of its light output through the few pixels on the screen that it can escape! XD

[Joe_Cool]

Brightness down, LAN card disabled (the media sense on RTL cards sucks about 1.5W with no cable plugged in, wtf? Thats more than the Wifi needs)

And powertop (great piece of software, thanks Intel) tuned to the max + powersave scheduler. All that on Windows or KDE results in about 4-5h of battery though. So fbdev must be somehow really frugal.