linux-kernel - Re: [34-stable regression] USB delay init quirk causes device events loss

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Date:	Mon, 13 Sep 2010 16:59:12 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	phil@...m.com, stable@...nel.org, Greg KH <gregkh@...e.de>,
	USB list <linux-usb@...r.kernel.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [34-stable regression] USB delay init quirk causes device events
 loss

On 09/13/2010 04:48 PM, Alan Stern wrote:
> On Mon, 13 Sep 2010, Jiri Slaby wrote:
>> In other words, what I could do is to add some printks into
>> hub_port_connect_change if that's called at all. If you need some
>> thorough debugging printks, please send me a patch to test instead.
> 
> Hmm.  I'd prefer to explain how it's all supposed to work and let you
> figure out where best to look.  Or try to debug it myself.  Does this
> happen with other sorts of USB devices as well, or just wacom?

With some sort of devices (I cannot reproduce myself). It's unrelated to
wacom -- people with wacom were unable to even start X with this kernel.
If you look at the bugreport, there are several examples:
ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser defunct
Microsoft USB keyboard defunct x Logitech mice OK
046a:0021 Cherry GmbH keyboard defunct
logitech wireless laptop mouse defunct
A$Tech wireless laptop mouse defunct
TypeMatrix USB 2030 (ID : 1e54:2030) defunct

thanks,
-- 
js
suse labs
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