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Laptop Batteries

 
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tommohawk
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Joined: Thu Mar 30, 2006 2:10 pm
Posts: 145
Location: Bury,UK

PostPosted: Tue May 16, 2006 9:28 pm    Post subject: Laptop Batteries Reply with quote

Why is it that my laptop battery lasts about twice as long under Linux than under Windows?

It's not that I am looking for answers, its just I am a bit curious? Is Linux really that that much more efficient (in terms of processor usage etc) that it just uses fewer system resources and hence less power?

Well, maybe not twice as long but certainly significantly longer!
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shifty_ben
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Joined: Tue Oct 04, 2005 10:56 am
Posts: 1292
Location: Ipswich

PostPosted: Tue May 23, 2006 1:24 am    Post subject: RE: Laptop Batteries Reply with quote

Alternatively it could just be that Linux warns you of a low battery later than Windows. I noticed the same thing when i first got my laptop, though I couldn't say how big the gap is as I havent had Windows on here in a long time, something that I am incredibly pleased about Very Happy
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M-Saunders
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Joined: Mon Apr 11, 2005 1:14 pm
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PostPosted: Tue May 23, 2006 10:14 am    Post subject: RE: Laptop Batteries Reply with quote

It could be using different power-saving schemes to Windows. When I installed Ubuntu on my new laptop, it defaulted to spinning down the hard drive after 5 seconds of inactivity! A bit aggressive methinks -- and also very annoying. Every time I did something that touched the disc, it'd take a few seconds to spin up. Sorted that out with hdparm -S Smile

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roeleboel



Joined: Fri Mar 17, 2006 4:29 pm
Posts: 46

PostPosted: Tue May 23, 2006 4:57 pm    Post subject: RE: Laptop Batteries Reply with quote

Mike,

that hdparm -S thing, do you set that like this:
sudo hdparm -S=241 hda (for 1/2 hour waiting)? The man page is not very clear about this.

regards
Roel
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roeleboel



Joined: Fri Mar 17, 2006 4:29 pm
Posts: 46

PostPosted: Tue May 23, 2006 5:00 pm    Post subject: RE: Laptop Batteries Reply with quote

Already found it:
sudo hdparm -S 241 /dev/hda Wink
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