[ltp] x61s battery life time

[John Jason Jordan]

On Thu, 7 Feb 2008 16:27:37 +0100
Damien Challet <dchallet@onetel.com> dijo:

> > I'm a bit confused... I have a X61s, with the preinstalled Windows Vista I
> > get max. nearly 10 hours, normal use maybe 6 or 7 hours. With Linux (Arch)
> > I get 4.5 hours, even with maximum screen brightness (haven't manages to
> > get it down) and most of power savings don't work so far. Are there several
> > versions of the battery? I can't understand you get so short times...
> 
> xbacklight is your friend.

I have xbacklight installed on my T61 with Gutsy x86_64 (nVidia video),
but something is wrong:

jjj@Devil7:~$ xbacklight -get
No outputs have backlight property

What does that mean?