Date: Mon, 13 Dec 2004 10:21:07 -0800 From: Nate Lawson <nate@root.org> To: Igor Partola <ipartola@clarku.edu> Cc: freebsd-acpi@freebsd.org Subject: Re: Soundcard powerdown Message-ID: <41BDDD93.4020308@root.org> In-Reply-To: <41BDD431.1010702@clarku.edu> References: <41BDD431.1010702@clarku.edu>
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Igor Partola wrote: > Good time of day, > > I found an interesting feature under the Windows installation on my > laptop. It seems that when there is no sound playing the soundcard is > shut off. I'm not sure how much power this would save but it is > interesting that this is possible. Maybe this could appear on a distant > wishlist. That would need to be built into the sound card driver (or snd mid-layer). All it would have to do is call pci_set_powerstate(dev, ...D3) on attach and then set it to D0 before beginning playback. -- Nate
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