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To: gentoo-kernel@g.o
From: Sebastian Kromp <teufelpersoenlich@...>
Subject: Re: wacom bug question (bug #205261)
Date: Thu, 07 Feb 2008 20:59:09 +0100
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Daniel Drake schrieb:
> Sebastian Kromp wrote:
>> I´ve choosed this bug for beginning
>> http://bugs.gentoo.org/show_bug.cgi?id=205261 , and after
>> searching the web I´ve found this
>> http://linuxwacom.sourceforge.net/index.php/howto/inputdev , and
>> I think, that could solve the problem. But because I don´t want
>> to do something wrong, I want to ask first, what I exactly should
>> do now, cause it´s a little bit unclear for me.
>
> You've found a document detailing how to match up the kernel side
> driver part (wacom) with the userspace configuration for the
> tablet.
>
> The problem in this case is that the kernel driver is not
> recognizing the device, and hence is not creating the
> /dev/input/eventX interface that the document is talking about. So,
>  the document is not entirely relevant because the problem occurs
> at a lower layer.
>
> The next thing to do on that bug is to research the issue. Try and
> find other Linux users who have the same hardware, and see whether
> they are reporting it as working or broken. If it appears broken
> for everyone, has it been reported to the wacom developers, perhaps
> on a mailing list? Are there any patches available? Google around a
> bit, and let us know what you find (if you're confident you can
> just put your findings directly on the bug).
>
> Also, you'll see that I asked for "lsusb -v" output. I asked for
> this because all USB devices have unique ID numbers (vendor and
> product ID) which can be useful when searching. In this case the
> vendor ID is 056a and the product ID is 0090 (see if you can find
> where I read those numbers from in his attachment). Just putting
> the phrase "056a 0090" into google seems to bring up some relevant
> results.
>
> Thanks, Daniel
I thought the linuxwacom-project offers a kernelmodule too, but they
seem not to, sorry.

Well, I´ve found this bug at the kernel bugzilla
http://bugzilla.kernel.org/show_bug.cgi?id=9658 and looked for the
vendor_id-struct at the /drivers/input/tablet/wacom_wac.c of the
kernels,  2.6.23-gentoo-r3 (the bugreporter uses), 2.6.23-gentoo-r6
and 2.6.24-git16 and the Vendor ID 0x56a isn´t there. I´m not sure if
it´s true, but I guess this means, that this tablet isn´t supported
yet, isn´t it?

I´ve searched for other reports too. I have found a "fix", which
doesn´t work
(http://permalink.gmane.org/gmane.linux.drivers.wacom/1251), but it
seems, that the guys are working for a fix at it, I will try to
contact one of the guys to ask, if they maybe found something useful.

I´ve found lots of reports , that says that this tablet isn´t
working/supported yet, but the linux-wacom-project seems to work at it
/( I've contacted Ping Cheng form Linux Wacom Tablet Project and asked
when they will add support for us. Answer:

"It is in my to-do list
http://sourceforge.net/tracker/index.php?func=detail&aid=1593330&group_id=69596&atid=525127
). But, I don't have time to work on it soon. If you have development
experience, you may work on it. Otherwise, we'll have to see if there
is anyone else available in the development group before I get a
chance to work on it. " -
/http://forum.tabletpcreview.com/archive/index.php/t-3798.html/)
/
The tablet seems to work with the usbhid-module with older kernels
under Ubuntu, but without sensitivity and the other tablet-special stuff.

I have nothing found, that points to that this problem was reported to
the wacom or kernel developers.

I hope this all is useful,
Sincerely,
Sebastian
/
/



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-- Daniel Drake
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