Date: Thu, 09 Feb 2006 08:34:37 -0800 From: "Kevin Oberman" <oberman@es.net> To: Gregers Petersen <gp.ioa@cbs.dk> Cc: freebsd-mobile@freebsd.org Subject: Re: Power-drain during suspend? Message-ID: <20060209163437.6AF8C45041@ptavv.es.net> In-Reply-To: Your message of "Thu, 09 Feb 2006 11:07:44 %2B0100." <43EB1470.9020806@cbs.dk>
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> Date: Thu, 09 Feb 2006 11:07:44 +0100
> From: Gregers Petersen <gp.ioa@cbs.dk>
> Sender: owner-freebsd-mobile@freebsd.org
>
> Dear all
>
> I'm running FreeBSD 6.0 Release on an IBM Thinkpad R51, with a Ati 9000
> GPU and have problems with a very high power comsumption during suspend?
> All other issues have been solved and everything is working and stable
> (speedstep, lid-suspend, buttons, wifi, network/mouse after suspend
> etc.) - I have aprox. 2.5 hours when I run on battery - but if I send
> the R51 into suspend (S3) the battery is completely drained after 6-7 hours?
> I have been trying to add 'Radeontool' to my suspend/resume scripts -
> but this does not solve the problem.
>
>
> Would anybody be able to advice me on this subject ?
Sure. It's free and probably worth about that, but:
Since you are using RadeonTool, are you just turning off the LCD screen?
Yo also should turn off the DAC which is used to drive the VGA
connector.
# If radeontool is available, turn off the light
if [ -x /usr/local/bin/radeontool ]; then
/usr/local/bin/radeontool light off
/usr/local/bin/radeontool dac off
fi
I don't bother to turn the DAC back on whenI resume, since I really
don't ever use it.
Another big issue is setting the power states of PCI devices. While
support for this has been in FreeBSD for a while (6.0?), the application
of them on some platforms, usually desktops, results in lock-ups. As a
result, parts are disabled by default. Most laptops have no problems
implementing this capability and turning it on should improve things, as
well.
hw.pci.do_power_nodriver=[1|2|3]
The larger the number, the more aggressive the power limitations. I use
'3' on my T30 and it works fine.
--
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net Phone: +1 510 486-8634
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