linux-kernel - Re: hid device not claimed but /dev/input/event exists

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Date:	Tue, 19 Feb 2008 18:48:41 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Tomas Carnecky <tom@...ervice.com>
cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: hid device not claimed but /dev/input/event exists

On Tue, 19 Feb 2008, Tomas Carnecky wrote:

> The device apparently has four 'interfaces' - whatever that is, see [1]. 
> It seems like usbhid probes interface 2 (which is the LCD plus a few 
> buttons, probably the four just under the LCD, as described [1]). 
> Because usbhid doesn't know how to handle the buttons, it fails. But 
> then it probes interface 3 which is a 'proper' HID device with 
> well-defined buttons.

Yes, the dump clearly shows that.

Does anything appear in dmesg when you press those buttons? There should 
be messages resembling the one you already have there:

drivers/hid/hid-core.c: report (size 8) (unnumbered)
drivers/hid/hid-core.c: report 0 (size 8) =  00 00 28 00 00 00 00 00

and they should react to keys such as FastForward, Play, Mute, Volume Up, 
etc.

-- 
Jiri Kosina
SUSE Labs
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