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

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Message-Id: <20070803130459.cdd964b7.zaitcev@redhat.com>
Date:	Fri, 3 Aug 2007 13:04:59 -0700
From:	Pete Zaitcev <zaitcev@...hat.com>
To:	Dave Jones <davej@...hat.com>
Cc:	Oliver Neukum <oliver@...kum.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Greg KH <gregkh@...e.de>,
	linux-usb-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: Only enable autosuspend by default on certain
 device classes

On Fri, 3 Aug 2007 15:45:32 -0400, Dave Jones <davej@...hat.com> wrote:

>  > > My experience suggests the opposite.  Of the several I've tried so far,
>  > > none have worked with usb suspend.
>  > 
>  > All of mine work. I'm wondering if this has something to do with
>  > a hub or motherboard... How should we test it? Tried plugging elsewhere?
> 
> no hubs involved, directly plugged them into the mainboard.
> Fairly recent Intel chipsets on all the systems I tested.

Sounds bad.

BTW, when I took over from Vojtech, I looked at the suspend methods
for the printer and it seemed possible that they can only work
if the device is not open when suspend occurs. I was going to look
at that at the first opportunity.

So, I'd rather keep at least some kind of capability to suspend
printers, even if disabled by default. I thought Matthew's patch
was too harsh.

-- Pete
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