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

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Date:	Mon, 02 May 2011 21:35:23 +0200
From:	"Adi J. Sieker" <adi@...ker.io>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	Oliver Neukum <oliver@...kum.org>,
	USB list <linux-usb@...r.kernel.org>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: USB keyboard recognized as HID keyboard but doesn't work

On 02/05/11 16:04, Alan Stern wrote:
> On Sun, 1 May 2011, Adi J. Sieker wrote:
>
>> On 01/05/11 09:53, Oliver Neukum wrote:
>>> Am Samstag, 30. April 2011, 22:23:05 schrieb Adi J. Sieker:
>>>> Hello,
>>>>
>>>> the lovely folks from #kernelnewbies suggested I write this mail since
>>>> they are at a loss.
>>>> I recently got a new USB keyboard which works fine in the BIOS and also
>>>> in VBox Windows guests, but not on the host.
>>>>
>>>> The keyboard is a Keysonic KSK-8003 UX product details here:
>>>> http://maxpoint.de/de/products/keyboards.php?pid=1_3_7&we_objectID=1220
>>>>
>>>> The menu key and the backspace keys do work. The num lock led is on,
>>>> though I can't switch num lock off.
>>>> If I attch the keyboard to a VirtualBox VM running WindowsXP as a guest,
>>>> it works as expected in the VM.
>>> This indicates that it is working on the USB level.
>>>
>>>> I'm running 2.6.32-27-generic #49-Ubuntu. I tried the Ubuntu 10.10
>>>> LiveCD and that also didn't work. I haven't tried 11.04 yet though.
>>> Do you get anything on the event device? What does udev say when you
>>> plug in the device?
>
> ...
>
>> one thing I found out is that this keyboard has some special anti
>> ghosting function for some keys. Where you can press multiple keys
>> simultaneously
>> and they are all recognized. This is apparently great for gaming. Which
>> I'm not interested in...
>
> Something else that might help is a usbmon trace showing what happens
> when you plug in the keyboard.  Instructions are in the kernel source
> file Documentation/usb/usbmon.txt.  In particular, while running the
> test try pressing some of the normal keys that don't work.
>

The attached file usbmon-working.out is the output when I pressed the 
backspace key. When I press any of the non working keys which is 
everything but the backspace and menu key. I don't get any output even 
when using 0u.

> Also, it would help to see the output from "lsusb -v" for this device
> -- but you'll have to unbind it from the usbhid driver first.
>

When attaching the keyboard I get 2 devices in
/sys/bus/usb/drivers/usbhid/2-1.1:1.0  and
/sys/bus/usb/drivers/usbhid/2-1.1:1.1

The output is in the attached lsusb.txt.

Cheers
   Adi


View attachment "lsusb.txt" of type "text/plain" (12597 bytes)

View attachment "usbmon-working.out" of type "text/plain" (203 bytes)