linux-kernel - Re: [PATCH] eeepc-laptop: enable camera by default

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Message-Id: <1244213412.23533.41.camel@penberg-laptop>
Date:	Fri, 05 Jun 2009 17:50:12 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	alan-jenkins@...fmail.co.uk
Cc:	Corentin Chary <corentin.chary@...il.com>,
	acpi4asus-user@...ts.sourceforge.net, len.brown@...el.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] eeepc-laptop: enable camera by default

Hi Alan,

On Fri, 2009-06-05 at 15:38 +0100, Alan Jenkins wrote:
> Ok.  I didn't bother shutting down my system, but I get a similar
> difference; 16 wakeups/s disabled v.s. 25 enabled.  Anecdotally,
> disabling the camera does help battery life, and presumably Asus had
> good reason to implement it!  (The shipped OS "fixes" the usability
> problem by patching the camera apps).
> 
> BUT I found that autosuspend didn't seem to break anything, and
> enabling it also got me down to 16 wakeups/s.  I think this is ideal
> because autosuspend is automatic so I can save power without manual
> toggling.
> 
> Here's some magic to enable autosuspend:
> 
> # echo -n auto > /sys/bus/usb/drivers/uvcvideo/*:*/../power/level
> 
> Ideally this wants to be enabled automatically using a udev rule.

Can the kernel do this by default for this specific driver on eeepc?

			Pekka

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