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Date:      Sat, 24 Nov 2012 14:19:29 +0100
From:      Hans Petter Selasky <hselasky@c2i.net>
To:        freebsd-hackers@freebsd.org
Cc:        Niclas Zeising <zeising+freebsd@daemonic.se>
Subject:   Re: Questions about USB, uhid, ukbd and quirks
Message-ID:  <201211241419.29050.hselasky@c2i.net>
In-Reply-To: <50B0C395.8060809@daemonic.se>
References:  <50B0001C.6050202@daemonic.se> <50B0BC44.2090609@daemonic.se> <50B0C395.8060809@daemonic.se>

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On Saturday 24 November 2012 13:54:45 Niclas Zeising wrote:
> On 11/24/12 13:23, Niclas Zeising wrote:
> > On 11/24/12 13:17, Hans Petter Selasky wrote:
> >> On Saturday 24 November 2012 12:13:49 Hans Petter Selasky wrote:
> >>> On Saturday 24 November 2012 00:00:44 Niclas Zeising wrote:
> >>>> Hi!
> >>>> I have a couple of questions about USB.
> >>>> I recently bought a new USB keyboard, a Logitech K120. When attaching
> >>>> this to a FreeBSD system, however, it is detected as a hid device
> >>>> (attaching to uhid) rather than a keyboard (attaching to ukbd). The
> >>>> keyboard works fine, but I'm just curious as to why it doesn't use
> >>>> ukbd.
> >>> 
> >>>> The output from usbconfig for this keyboard is:
> >>> Hi,
> >>> 
> >>> It seems the UHID driver needs to be synced with UMS and UKBD
> >>> regarding the
> >>> detection logic. Can you try the attached patch and report back.
> >>> 
> >>> --HPS
> >> 
> >> One more thing to check:
> >> 
> >> /etc/devd/usb.conf
> >> 
> >> Is perhaps auto-loading uhid before ukbd, and that might also be part
> >> of the
> >> issue.
> > 
> > Hi!
> > Having ukbd in the kernel, and not uhid, makes uhid load as a module
> > during boot and attach to the keyboard, even with your patch. I'm
> > recompiling the kernel now with uhid as part of the kernel to see if it
> > makes a difference. I'm not too confortable hacking /etc/devd/usb.conf,
> > but if you can point me in the right direction I'll have a go at it.
> > Regards!
> 
> Having uhid in the kernel did not make a difference, it attached to the
> keyboard (or rather, the keyboard attached to the uhid driver, I guess).
> Regards!

Could you dump the configuration descriptor of your device using usbconfig?

usbconfig -d X.Y dump_curr_config_desc

--HPS



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