linux-kernel - Re: usb hid: reset NumLock

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Message-Id: <20070331154318.05724805.zaitcev@redhat.com>
Date:	Sat, 31 Mar 2007 15:43:18 -0700
From:	Pete Zaitcev <zaitcev@...hat.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	dtor@...ightbb.com, linux-usb-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, stuard_hayes@...l.com,
	zaitcev@...hat.com
Subject: Re: usb hid: reset NumLock

On Sat, 31 Mar 2007 21:35:19 +0200 (CEST), Jiri Kosina <jkosina@...e.cz> wrote:
> On Fri, 30 Mar 2007, Pete Zaitcev wrote:

> I think I see an issue here. Imagine that you boot a system initially with 
> one keyboard connected (usb, ps/2, doesn't matter), and after some time 
> you connect second USB keyboard (the NumLock is 'on' on the first keyboard 
> when you connect the second one).
> 
> Without your patch, the NumLock led will be OK on the second keyboard 
> immediately. With your patch, the NumLock will be forced to 'off' and it 
> will be out of sync with the first keyboard. The leds will get in sync 
> later when any change occurs. 

Oh, right, I missed it. The difficulty is how I rely on usages and fields
being already mapped by hidinput_configure_usage(). Thanks for letting me
know, I'll think about it.

-- Pete
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