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From: Richard Mittendorfer <delist@gmx.net>
To: linux-kernel <linux-kernel@vger.kernel.org>
Subject: PCI devices power management, w/o sysfs? [Was: Re: Liunx power consumption on laptops ...]
Date: Wed, 11 Jul 2007 14:42:33 +0200	[thread overview]
Message-ID: <20070711144233.92a584fd.delist@gmx.net> (raw)
In-Reply-To: <468D4D82.8030009@linux.intel.com>

Greetings *!

I'm looking for a way to disable (PM low power mode) some devices I
rarely/never use on my laptop to save some more power. With 2.6.17,
IIRC, I was able to echo -n 2 > /sys/bus/pci/../power to put things
into low power mode. (I don't know if it ever worked, but at least it
looked like it did.)

..-2.6.22(-ck1) w/ CONFIG_PM_SYSFS_DEPRECATED doesn't let me change this
state. evident :) -----------------^^^^^^^^^^

Is there a proper way to do this (setpci, if I'd know the registers)?
Is it gone/going inside drivers (like USB_SUSPEND) and I don't have to
worry?

I currently don't load the modules in question - but I'm not sure if it
helps, as they might already be powered on by PCI initialization/BIOS
(/sys/bus/pci/../state cats "0").

THX, ritch

  parent reply	other threads:[~2007-07-11 12:42 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-05 19:58 Liunx power consumption on laptops -- Enormous progress in the last few months Arjan van de Ven
2007-07-06 16:34 ` Chuck Ebbert
2007-07-06 16:35   ` Arjan van de Ven
2007-07-06 17:02     ` Dave Jones
2007-07-09 21:42       ` Valdis.Kletnieks
2007-07-09 21:46         ` Dave Jones
2007-07-06 18:02     ` Chuck Ebbert
2007-07-09 17:55       ` Bill Davidsen
2007-07-10 18:59         ` Pavel Machek
2007-07-11 12:42 ` Richard Mittendorfer [this message]
2007-07-12  1:15   ` PCI devices power management, w/o sysfs? [Was: Re: Liunx power consumption on laptops ...] Arjan van de Ven

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