From owner-freebsd-mobile@FreeBSD.ORG  Thu Oct 13 01:02:22 2005
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Date: Thu, 13 Oct 2005 01:02:20 +0000
From: Eric Kjeldergaard <kjelderg@gmail.com>
To: Barkley Vowk <bvowk@math.ualberta.ca>
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References: <20051012155949.G54439@3jane.math.ualberta.ca>
Cc: freebsd-mobile@freebsd.org
Subject: Re: Suspend drains battery on IBM T42
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On 12/10/05, Barkley Vowk <bvowk@math.ualberta.ca> wrote:
> I just got a new T42 notebook, and everything works ok, except when I dro=
p
> the notebook into acpi sleep, it burns through the battery in 8 hours or
> so. It would be nice if the notebook could suspend at least overnight.
>
> I've also noticed that the suspended notebook is warm to the touch. And,
> that when the notebook is suspended, the LCD backlight goes off, but the
> text is still faintly visible.
>
> This site leads me to believe that my radeon chipset isn't being put to
> bed:
> http://www.thinkwiki.org/wiki/Problem_with_high_power_drain_in_ACPI_sleep
>
> I'm running 6.0-B5, and I've got acpi_ibm, acpi_video loaded (I kind of
> wish suspend/resume would work with drm enabled).
>
> I had tried using apm instead of acpi, but usb fails to work after
> resuming, so I didn't test to see if the power drain was better.

you may want to check out radeontool
http://www.init-main.com/radeontoolport.tar.gz .  Another common user
of power in suspended laptops seems to be USB not shutting down.  Good
luck with your troubles,

Eric

--
If I write a signature, my emails will appear more personalised.