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

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Date:	Mon, 02 May 2011 22:49:54 +0200
From:	"Adi J. Sieker" <adi@...ker.io>
To:	USB list <linux-usb@...r.kernel.org>
CC:	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 22:27, Alan Stern wrote:
> On Mon, 2 May 2011, Adi J. Sieker wrote:
>
>>> 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.
>
> Sorry, I wasn't clear enough.  I meant for you to start the usbmon
> trace _before_ plugging in the keyboard, so we can see what happens as
> the keyboard is initialized and probed.
>

You were clear enough, I just couldn't read. :)

Attached is the usbmon trace when I plug the keyboard in.

lsusb shows the keyboard as:
Bus 002 Device 008: ID 060b:0230 Solid Year

Relevant section from /sys/kernel/debug/usb/devices
T:  Bus=02 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  8 Spd=1.5 MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=060b ProdID=0230 Rev= 2.20
S:  Manufacturer=KB
S:  Product=USB Keyboard
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=10ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=   8 Ivl=10ms


Cheers
    Adi

View attachment "usbmon.out" of type "text/plain" (3676 bytes)