linux-kernel - Re: [Bug 10797] Battery is drained after poweroff

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Message-ID: <20081007190007.GB6604@elf.ucw.cz>
Date:	Tue, 7 Oct 2008 21:00:07 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	"Renato S. Yamane" <yamane@...mondcut.com.br>
Cc:	linux-kernel@...r.kernel.org, rjwysocki@...k.pl,
	power-management_other@...nel-bugs.osdl.org
Subject: Re: [Bug 10797] Battery is drained after poweroff

On Tue 2008-10-07 13:06:10, Renato S. Yamane wrote:
> Pavel Machek wrote:
> Renato S. Yamane wrote:
> >> Can someone help us with this bug?
> >> <http://bugzilla.kernel.org/show_bug.cgi?id=10797>
> >>
> >> Same problem is reported in Ubuntu:
> >> <https://bugs.launchpad.net/ubuntu/+source/linux/+bug/110784>
> >>
> >> This is not a hardware problem, because if the same laptop is poweroff
> >> by Windows, battery charge don't change.
> > 
> > ...and it is not linux problem because it works okay on my thinkpad. See? 
> 
> Yes, this is a Linux problem (at least in release >= 2.6.22)
> This happening *only* in Linux (Kernel >=2.6.22).

Wow, now that's useful info.

I guess you _could_ do git bisect? ;-).

> >> And, if I suspend to ram/disk BEFORE poweroff, battery charge don't
> >> change (suspend to ram/disk --> WakeUp --> Poweroff).
> > 
> > Which machine is that? Can you find out which device eats power? (It
> > should be warm).
> 
> This problem is happening in Toshiba Satellite M45-S355, Toshiba Equium
> A100-306, HP DV8000, HP DV9500, Dell Latitude D630, Toshiba M110, Sony
> Vaio VGN-S2XP, Toshiba Satellite A105-S4384, Toshiba Satellite M55-S3314
> and Toshiba Satellite A105-S2201 as you can see in bug report listed above.
> 
> And is impossible find wich device eats power (eaten current is too low,
> and is not enought to make hot).

So how fast is it eating power... can you estimate Watts eaten?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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