On Sat, 02 May 2009 15:45:17 +0200, Kaixi Luo wrote:

> the battery of my laptop used to last much longer with Windows Vista (4
> hours)  than with Debian (2.5 hours). How's that possible?

I bet that your Debian's power saving is not enabled by default. You've 
got to do some preliminary readings on that. E.g., 
http://xpt.sourceforge.net/techdocs/nix/sysmng/sm03-EnergySaving/
would be a good starting point. 

-- 
Tong (remove underscore(s) to reply)
  http://xpt.sourceforge.net/techdocs/
  http://xpt.sourceforge.net/tools/


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