linux-kernel - Re: [linux-usb-devel] [PATCH] USB: Only enable autosuspend by default on certain device classes

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Message-Id: <200708030949.28252.david-b@pacbell.net>
Date:	Fri, 3 Aug 2007 09:49:27 -0700
From:	David Brownell <david-b@...bell.net>
To:	Dave Jones <davej@...hat.com>
Cc:	Jiri Kosina <jikos@...os.cz>,
	Adam Kropelin <akropel1@...hester.rr.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Oliver Neukum <oliver@...kum.org>,
	Rogan Dawes <lists@...es.za.net>, Greg KH <gregkh@...e.de>,
	linux-kernel@...r.kernel.org,
	Alan Stern <stern@...land.harvard.edu>,
	linux-usb-devel@...ts.sourceforge.net
Subject: Re: [linux-usb-devel] [PATCH] USB: Only enable autosuspend by default on certain device classes

On Friday 03 August 2007, Dave Jones wrote:
>  > > Plus if you're connected to such a device for monitoring purposes you're 
>  > > probably powered by it as well, so you have little to gain from suspend 
>  > > even if it works.
>  > 
>  > I currently don't have any HID UPS by hand to verify, but I'd be surprised 
>  > if they would advertise remote wakeup capability ... ?
> 
> Looks like mine does..

Makes sense.  You don't want to force the host to ignore all
power events.  As with a laptop, you might want servers to
cleanly hibernate before the (UPS) battery runs out...

- Dave

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