linux-kernel - Re: usb still sucks battery in -rc7-mm1

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Message-ID: <20060924162158.GB5156@ucw.cz>
Date:	Sun, 24 Sep 2006 16:21:58 +0000
From:	Pavel Machek <pavel@....cz>
To:	Alexander Gran <alex@...ns.eu>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>,
	Linux usb mailing list 
	<linux-usb-devel@...ts.sourceforge.net>
Subject: Re: usb still sucks battery in -rc7-mm1

On Sun 24-09-06 16:49:59, Alexander Gran wrote:
> Perhaps your cpu cannot go into deep c states? At least my IBm T40p has that 
> problem, when USB is enabled.

Yes, and latest -mm's were expected to fix that...

							Pavel

> 
> regards
> Alex
> 
> Am Sonntag, 24. September 2006 11:08 schrieb Pavel Machek:
> > Hi!
> >
> > I made some quick experiments, and usb still eats 4W of battery
> > power. (With whole machine eating 9W, that's kind of a big deal)...
> >
> > This particular machine has usb bluetooth, but it can be disabled by
> > firmware, and appears unplugged. (I did that). It also has fingerprint
> > scanner, that can't be disabled, but that does not have driver (only
> > driven by useland, and was unused in this experiment).
> >
> > Any ideas?
> > 								Pavel
> 
> -- 
> Encrypted Mails welcome.
> PGP-Key at http://www.grans.eu/misc/pgpkey.asc | Key-ID: 0x6D7DD291
> More info at http://www.grans.eu/Alexander_Gran.html



-- 
Thanks for all the (sleeping) penguins.
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