Re: [Linuxwacom-discuss] [Cintiq 12WX] Only 8 buttons out of 10

[Ping C. <pin...@gm...>]

Hi Matthieu,

Thank you for the detailed report. As you guessed, it is indeed a
kernel driver issue. I'm working on the upstream patch. Once the patch
is accepted upstream, we'll backport it into input-wacom for those who
can not wait for the next distribution update.

Stay tuned...

Ping

On Fri, Aug 18, 2017 at 9:42 AM, Matthieu Robin <mat...@ma...> wrote:
> Hi everybody
>
> I'm trying to configure my Wacom tablet on a Ubuntu 17.4 installation.
> Everything works like a charm... Except that 2 buttons (out of 10) don't
> work at all.
>
> Tablet is DTZ-1200W, aka. Ltd Cintiq 12WX
>
> It's the model referenced here:
> https://sourceforge.net/p/linuxwacom/libwacom/ci/master/tree/data/cintiq-12wx.tablet
>
> All buttons work except the upper ones, named I and J in the file above.
>
> When using xsetwacom, I can see all 10 buttons in the list of parameters:
>
> $ xsetwacom -s get 21 all
> Property 'Wacom Tablet Area' does not exist on device.
> xsetwacom set "21" "Button" "1" "key +a -a "
> xsetwacom set "21" "Button" "2" "key +b -b "
> xsetwacom set "21" "Button" "3" "key +c -c "
> xsetwacom set "21" "Button" "8" "key +d -d "
> xsetwacom set "21" "Button" "9" "key +e -e "
> xsetwacom set "21" "Button" "10" "key +f -f "
> xsetwacom set "21" "Button" "11" "key +g -g "
> xsetwacom set "21" "Button" "12" "key +h -h "
> xsetwacom set "21" "Button" "13" "key +i -i "
> xsetwacom set "21" "Button" "14" "key +j -j "
> ...
>
>
> Buttons 1 to 12 work like a charm. However, nothing happens if I press
> button 13 or 14. So I'll never see "i" nor "j".
>
> Let's try to see what xinput tells us:
>
> $ xinput test-xi2
>
> => events are dumped for the 8 buttons that work. However, nothing happens
> for the 2 faulty ones.
>
> Let's dig a little deeper:
>
> # cat /dev/input/by-id/usb-Tablet_DTZ-1200W-mouse
>
> Same here: I see data only for 8 buttons out of 10.
>
>
> Time for some USB debugging. Let's see what usbmon tells us:
>
> root@hostname:/sys/kernel/debug/usb/usbmon# cat 2u
>
> --- When I press one "faulty" button
> ffff9aec50e8dcc0 2743584310 C Ii:2:004:1 0:1 10 = 0c000000 00100000 0000
> ffff9aec50e8dcc0 2743584344 S Ii:2:004:1 -115:1 10 <
> ffff9aec50e8dcc0 2743793276 C Ii:2:004:1 0:1 10 = 0c000000 00000000 0000
> ffff9aec50e8dcc0 2743793303 S Ii:2:004:1 -115:1 10 <
>
> -- When I press one working button
> ffff9aec50e8dcc0 2763111318 C Ii:2:004:1 0:1 10 = 0c000000 00010000 0000
> ffff9aec50e8dcc0 2763111346 S Ii:2:004:1 -115:1 10 <
> ffff9aec50e8dcc0 2763290315 C Ii:2:004:1 0:1 10 = 0c000000 00000000 0000
> ffff9aec50e8dcc0 2763290343 S Ii:2:004:1 -115:1 10 <
>
> -- When I press another working button
> ffff9aec50e8dcc0 2787169353 C Ii:2:004:1 0:1 10 = 0c000000 00040000 0000
> ffff9aec50e8dcc0 2787169393 S Ii:2:004:1 -115:1 10 <
> ffff9aec50e8dcc0 2787377332 C Ii:2:004:1 0:1 10 = 0c000000 00000000 0000
> ffff9aec50e8dcc0 2787377352 S Ii:2:004:1 -115:1 10 <
>
> So, hardware sends a signal when pressing faulty button. Signal seems
> similar to other buttons, as far I can tell...
>
> I ran these tests with Linux kernel 4.10 and 4.12.
>
> Is it an issue in wacom kernel driver?
> How can I go further in troubleshooting it?
> I can provide usbmon dump for all 10 buttons. Would it help?
>
> Thanks a lot
>
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