linux-kernel - Re: [linux-usb-devel] converting appletouch to usb autosuspend...

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Message-ID: <Pine.LNX.4.64.0705122337470.16923@twin.jikos.cz>
Date:	Sat, 12 May 2007 23:40:42 +0200 (CEST)
From:	Jiri Kosina <jikos@...os.cz>
To:	Oliver Neukum <oneukum@...e.de>
cc:	Soeren Sonnenburg <kernel@....de>,
	linux-usb-devel@...ts.sourceforge.net,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [linux-usb-devel] converting appletouch to usb autosuspend...

On Sat, 12 May 2007, Alan Stern wrote:

> > While we are at it usb related powerhogs on this macbook pro are 
> > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) 
> > too...
> They would use less power if the UHCI host controller were suspended.  
> But obviously it cannot be suspended while devices attached to it (such 
> as the USB keyboard and the appletouch device) remain active.

A sidenote for completness, when this has been mentioned: Oliver has been 
working on autosuspend support for HID devices, he sent me some (yet 
incomplete) patches some time ago. So autosuspending of USB 
keyboards/mice/etc. is being worked on.

Oliver, do you have any update please?

Thanks,

-- 
Jiri Kosina
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