linux-kernel - Re: USB keyboard recognized as HID keyboard but doesn't work

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Date:	Fri, 6 May 2011 14:58:12 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Alan Stern <stern@...land.harvard.edu>,
	"Adi J. Sieker" <adi@...ker.io>
Cc:	Oliver Neukum <oliver@...kum.org>,
	USB list <linux-usb@...r.kernel.org>,
	linux-input@...r.kernel.org,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: USB keyboard recognized as HID keyboard but doesn't work

On Tue, 3 May 2011, Alan Stern wrote:

> > Do you know of a way for me to tell the kernel/usbhid to use interface 1 
> > and ignore interface 0?
> 
> Well, you can always unbind interface 0 from usbhid -- it corresponds
> to the 2-1.1:1.0 file in /sys/bus/usb/drivers/usbhid/.  If you do that,
> you'll probably find the few keys which _do_ currently work suddenly
> stop working.
> 
> But there's nothing to be done immediately about interface 1; usbhid is
> _already_ using it.  It just isn't using it correctly.

Adi,

could you please provide output of

	cat /syse/kernel/debug/hid/<keyboard>/rdesc

anytime after the keyboard has been plugged, and

	cat /syse/kernel/debug/hid/<keyboard>/events

from the time you press any of the working and non-working keys? (both 
cases will be interesting).

Oh, and the above assumes that you have debugfs mounted under 
/sys/kernel/debug.

Thanks,

-- 
Jiri Kosina
SUSE Labs
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