From: Alexander Gran <alex@grans.eu>
To: Pavel Machek <pavel@ucw.cz>
Cc: kernel list <linux-kernel@vger.kernel.org>,
Greg KH <greg@kroah.com>,
Linux usb mailing list <linux-usb-devel@lists.sourceforge.net>
Subject: Re: usb still sucks battery in -rc7-mm1
Date: Sun, 24 Sep 2006 16:49:59 +0200 [thread overview]
Message-ID: <200609241650.02922@zodiac.zodiac.dnsalias.org> (raw)
In-Reply-To: <20060924090858.GA1852@elf.ucw.cz>
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Perhaps your cpu cannot go into deep c states? At least my IBm T40p has that
problem, when USB is enabled.
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
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next prev parent reply other threads:[~2006-09-24 14:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-24 9:08 Pavel Machek
2006-09-24 12:18 ` [linux-usb-devel] " Theodoros V. Kalamatianos
2006-09-24 20:20 ` Pavel Machek
2006-09-27 22:46 ` David Brownell
2006-09-24 14:49 ` Alexander Gran [this message]
2006-09-24 16:21 ` Pavel Machek
2006-09-24 20:54 ` [linux-usb-devel] " Alan Stern
2006-09-24 21:05 ` Pavel Machek
2006-09-24 21:13 ` Alan Stern
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