Problems with Wacom Intuos PT M (CTH680) on FreeBSD

Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Denis Akiyakov]

Hello,

I'm using FreeBSD 10.1 and FreeBSD use webcamd witch contain linux wacom 
driver to provide wacom tablets support. More info here: 
http://www.selasky.org/hans_petter/video4bsd/ or 
http://www.freshports.org/multimedia/webcamd/

I've got latest version of webcamd and Wacom device CTH680, but device 
isn't working correct.

dmesg:

ugen2.3: <Wacom Co.,Ltd.> at usbus2
ums0: <Wacom Co.,Ltd. Intuos PTM, class 0/0, rev 2.00/1.00, addr 3> on 
usbus2
uhid2: <Wacom Co.,Ltd. Intuos PTM, class 0/0, rev 2.00/1.00, addr 3> on 
usbus2
uhid3: <Wacom Co.,Ltd. Intuos PTM, class 0/0, rev 2.00/1.00, addr 3> on 
usbus2


here are two outputs from webcamd:

first (/usr/local/sbin/webcamd -i 0 -d ugen2.3 -U webcamd -G webcamd -H):

: USB HID core driver
Linux video capture interface: v2.00
lirc_dev: IR Remote Control driver registered, major 14
IR NEC protocol handler initialized
IR RC5(x/sz) protocol handler initialized
IR RC6 protocol handler initialized
IR JVC protocol handler initialized
IR Sony protocol handler initialized
IR SANYO protocol handler initialized
IR LIRC bridge handler initialized
IR XMP protocol handler initialized
uvcvideo: Unable to create debugfs directory
USB Video Class driver (1.1.1)
cpia2: V4L-Driver for Vision CPiA2 based cameras v3.0.1
au0828 driver loaded
pvrusb2: V4L in-tree version:Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner
pvrusb2: Debug mask is 31 (0x1f)
USBVision USB Video Device Driver for Linux : 0.9.11
em28xx: Registered (Em28xx v4l2 Extension) extension
em28xx: Registered (Em28xx dvb Extension) extension
Attached to ugen2.3[0]
DBG: 0003:056A:0303.0001: Kicking head 1 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 2 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 3 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 4 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 5 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 6 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 7 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 8 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 9 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 10 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 11 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 12 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 13 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 14 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 15 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 16 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 17 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 18 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 19 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 20 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 21 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

INFO: 0003:056A:0303.0001: П│F: USB HID v1.10 Device [Wacom Co.,Ltd. 
Intuos PTM] on usb-/dev/usb-/dev/usb/input0

Waiting for HAL USB device.
Creating /dev/input/event0

#------------------------------------------
second (/usr/local/sbin/webcamd -i 1 -d ugen2.3 -U webcamd -G webcamd -H):
#------------------------------------------

: USB HID core driver
Linux video capture interface: v2.00
lirc_dev: IR Remote Control driver registered, major 14
IR NEC protocol handler initialized
IR RC5(x/sz) protocol handler initialized
IR RC6 protocol handler initialized
IR JVC protocol handler initialized
IR Sony protocol handler initialized
IR SANYO protocol handler initialized
IR LIRC bridge handler initialized
IR XMP protocol handler initialized
uvcvideo: Unable to create debugfs directory
USB Video Class driver (1.1.1)
cpia2: V4L-Driver for Vision CPiA2 based cameras v3.0.1
au0828 driver loaded
pvrusb2: V4L in-tree version:Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner
pvrusb2: Debug mask is 31 (0x1f)
USBVision USB Video Device Driver for Linux : 0.9.11
em28xx: Registered (Em28xx v4l2 Extension) extension
em28xx: Registered (Em28xx dvb Extension) extension
Attached to ugen2.3[1]
DBG: 0003:056A:0303.0001: Kicking head 1 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

DBG: 0003:056A:0303.0001: Kicking head 2 tail 0
ERR: 0003:056A:0303.0001: usb_submit_urb(ctrl) failed: -32

INFO: 0003:056A:0303.0001: П│F: USB HID v1.10 Device [Wacom Co.,Ltd. 
Intuos PTM] on usb-/dev/usb-/dev/usb/input1

Waiting for HAL USB device.
Creating /dev/input/event1
Creating /dev/input/event2
Creating /dev/input/js0


At the end, sometimes after few manipulations the touch by fingers 
starts working. Pen never works.

Can anyone help to resolve this problem? If you need other logs, please ask.
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Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Dmitry Torokhov]

Hi Denis,

On Sat, Oct 18, 2014 at 05:56:48PM +0700, Denis Akiyakov wrote:
> Hello,
> 
> I'm using FreeBSD 10.1 and FreeBSD use webcamd witch contain linux
> wacom driver to provide wacom tablets support. More info here:
> http://www.selasky.org/hans_petter/video4bsd/ or
> http://www.freshports.org/multimedia/webcamd/
> 
> I've got latest version of webcamd and Wacom device CTH680, but
> device isn't working correct.

Have you tried the device with Linux instead of FreeBSD? If it works in
Linux that means that the port of linux drivers to BSD is to blame and
you need to contact its authors, otherwise we need to adjust wacom
driver in kernel for this device.

Thanks.

-- 
Dmitry

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Denis Akiyakov]

On 22.10.2014 05:33, Dmitry Torokhov wrote:
> Hi Denis,
>
> On Sat, Oct 18, 2014 at 05:56:48PM +0700, Denis Akiyakov wrote:
>> Hello,
>>
>> I'm using FreeBSD 10.1 and FreeBSD use webcamd witch contain linux
>> wacom driver to provide wacom tablets support. More info here:
>> http://www.selasky.org/hans_petter/video4bsd/ or
>> http://www.freshports.org/multimedia/webcamd/
>>
>> I've got latest version of webcamd and Wacom device CTH680, but
>> device isn't working correct.
> Have you tried the device with Linux instead of FreeBSD? If it works in
> Linux that means that the port of linux drivers to BSD is to blame and
> you need to contact its authors, otherwise we need to adjust wacom
> driver in kernel for this device.
>
> Thanks.
>
Hello, Dmitry.

I've tried tablet in Ubuntu 14.04.1. All functions that work in Windows 
7 (in Krita) work under Ubuntu's Krita.

Thank you for your attention.

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Hans Petter Selasky]

On 10/23/14 06:54, Denis Akiyakov wrote:
> On 22.10.2014 05:33, Dmitry Torokhov wrote:
>> Hi Denis,
>>
>> On Sat, Oct 18, 2014 at 05:56:48PM +0700, Denis Akiyakov wrote:
>>> Hello,
>>>
>>> I'm using FreeBSD 10.1 and FreeBSD use webcamd witch contain linux
>>> wacom driver to provide wacom tablets support. More info here:
>>> http://www.selasky.org/hans_petter/video4bsd/ or
>>> http://www.freshports.org/multimedia/webcamd/
>>>
>>> I've got latest version of webcamd and Wacom device CTH680, but
>>> device isn't working correct.
>> Have you tried the device with Linux instead of FreeBSD? If it works in
>> Linux that means that the port of linux drivers to BSD is to blame and
>> you need to contact its authors, otherwise we need to adjust wacom
>> driver in kernel for this device.
>>
>> Thanks.
>>
> Hello, Dmitry.
>
> I've tried tablet in Ubuntu 14.04.1. All functions that work in Windows
> 7 (in Krita) work under Ubuntu's Krita.
>
> Thank you for your attention.
>

Hi,

The problem appears to be that webcamd launches two instances for each 
interface, so the shared data is not the same like with Linux. Actually 
the shared data is NULL.

I think however it would be clever that the Linux Wacom code would check 
"wacom->shared->touch_input" for NULL before using it, because it is not 
always set. This can be an easy way to crash the kernel when plugging a 
USB devices.

drivers/hid/wacom_wac.c:1395

and some more places.

--HPS

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Ping Cheng]

Hi Hans,

On Wed, Oct 22, 2014 at 10:54 PM, Hans Petter Selasky <hps@selasky.org> wrote:
>
> On 10/23/14 06:54, Denis Akiyakov wrote:
>>
>> On 22.10.2014 05:33, Dmitry Torokhov wrote:
>>>
>>> Hi Denis,
>>>
>>> On Sat, Oct 18, 2014 at 05:56:48PM +0700, Denis Akiyakov wrote:
>>>>
>>>> Hello,
>>>>
>>>> I'm using FreeBSD 10.1 and FreeBSD use webcamd witch contain linux
>>>> wacom driver to provide wacom tablets support. More info here:
>>>> http://www.selasky.org/hans_petter/video4bsd/ or
>>>> http://www.freshports.org/multimedia/webcamd/
>>>>
>>>> I've got latest version of webcamd and Wacom device CTH680, but
>>>> device isn't working correct.
>>>
>>> Have you tried the device with Linux instead of FreeBSD? If it works in
>>> Linux that means that the port of linux drivers to BSD is to blame and
>>> you need to contact its authors, otherwise we need to adjust wacom
>>> driver in kernel for this device.
>>>
>>> Thanks.
>>>
>> Hello, Dmitry.
>>
>> I've tried tablet in Ubuntu 14.04.1. All functions that work in Windows
>> 7 (in Krita) work under Ubuntu's Krita.
>>
>> Thank you for your attention.
>>
>
> Hi,
>
> The problem appears to be that webcamd launches two instances for each interface, so the shared data is not the same like with Linux. Actually the shared data is NULL.

If shared is NULL on FreeBSD, you need to make sure that part of code
is portable on FreeBSD. On Linux, the driver would fail to load if
shared is NULL since at least the current data can be assigned to
wacom_shared (please refer to wacom_add_shared_data() in wacom_sys.c
for detail).

> I think however it would be clever that the Linux Wacom code would check "wacom->shared->touch_input" for NULL before using it, because it is not always set. This can be an easy way to crash the kernel when plugging a USB devices.
>
> drivers/hid/wacom_wac.c:1395

touch_input is used in 6 places (4 times in wacom_wac.c and 2 times in
wacom_sys.c). They are called only when touch_max is not zero, that
is, only when touch input is defined.

If touch_input is NULL on FreeBSD, you need to figure out the root
cause. Checking on touch_input itself would not fix the root cause...

We are here to help if there is anything unclear to you in the code.

Cheers,

Ping

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Hans Petter Selasky]

On 11/01/14 00:27, Ping Cheng wrote:
> If touch_input is NULL on FreeBSD, you need to figure out the root
> cause. Checking on touch_input itself would not fix the root cause...

Right.

The root cause is that FreeBSD launches two instances of the driver, 
running in two different userland processes, for the two different Wacom 
interfaces on a common USB device. In Linux the wacom interface drivers 
are running from the same kernel, and can share the data in question, 
but in FreeBSD's webcamd emulation, this doesn't work. Then the first 
wacom probe call would have to grab the second interface.

Technically speaking this is a FreeBSD only problem and I plan to 
deliver a patch with the webcamd software to fix this, like already 
suggested to you guys. This situation can also happen on Linux in case 
of a "BadUSB" device. That's why I think that the NULL check should be 
upstreamed.

--HPS

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Dmitry Torokhov]

On Sat, Nov 01, 2014 at 08:40:19AM +0100, Hans Petter Selasky wrote:
> On 11/01/14 00:27, Ping Cheng wrote:
> >If touch_input is NULL on FreeBSD, you need to figure out the root
> >cause. Checking on touch_input itself would not fix the root cause...
> 
> Right.
> 
> The root cause is that FreeBSD launches two instances of the driver,
> running in two different userland processes, for the two different
> Wacom interfaces on a common USB device. In Linux the wacom
> interface drivers are running from the same kernel, and can share
> the data in question, but in FreeBSD's webcamd emulation, this
> doesn't work. Then the first wacom probe call would have to grab the
> second interface.
> 
> Technically speaking this is a FreeBSD only problem and I plan to
> deliver a patch with the webcamd software to fix this, like already
> suggested to you guys. This situation can also happen on Linux in
> case of a "BadUSB" device. That's why I think that the NULL check
> should be upstreamed.

Hmm, looking at this again it seems that we just cross our fingers and
hope that both interfaces are enumerated by the time we get event data
from the device. I do not think this is quite safe. We probably should
be checking the overall state of probing (i.e. whether we are done
probing both interfaces) before processing data for the device.

Or maybe we should just forcibly try claiming secondary interface
while probing primary instead of messing with shared data item.

That won't help Hans though: the devices do use 2 interfaces in tandem,
treating them separately will result in incorrect behavior.

Thanks.

-- 
Dmitry

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Ping Cheng]

Hi Dmitry,

On Tue, Nov 4, 2014 at 12:08 AM, Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
> On Sat, Nov 01, 2014 at 08:40:19AM +0100, Hans Petter Selasky wrote:
>> On 11/01/14 00:27, Ping Cheng wrote:
>> >If touch_input is NULL on FreeBSD, you need to figure out the root
>> >cause. Checking on touch_input itself would not fix the root cause...
>>
>> Right.
>>
>> The root cause is that FreeBSD launches two instances of the driver,
>> running in two different userland processes, for the two different
>> Wacom interfaces on a common USB device. In Linux the wacom
>> interface drivers are running from the same kernel, and can share
>> the data in question, but in FreeBSD's webcamd emulation, this
>> doesn't work. Then the first wacom probe call would have to grab the
>> second interface.
>>
>> Technically speaking this is a FreeBSD only problem and I plan to
>> deliver a patch with the webcamd software to fix this, like already
>> suggested to you guys. This situation can also happen on Linux in
>> case of a "BadUSB" device. That's why I think that the NULL check
>> should be upstreamed.
>
> Hmm, looking at this again it seems that we just cross our fingers and
> hope that both interfaces are enumerated by the time we get event data
> from the device. I do not think this is quite safe. We probably should
> be checking the overall state of probing (i.e. whether we are done
> probing both interfaces) before processing data for the device.

Are you going to make a patch to address the issue?

> Or maybe we should just forcibly try claiming secondary interface
> while probing primary instead of messing with shared data item.

If we incorporate the above idea into a patch, we need to keep in mind
that not all tablets support touch data. So, not all tablets have two
interfaces.

Cheers,

Ping

> That won't help Hans though: the devices do use 2 interfaces in tandem,
> treating them separately will result in incorrect behavior.
>
> Thanks.
>
> --
> Dmitry

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Dmitry Torokhov]

On Tue, Nov 04, 2014 at 09:38:38AM -0800, Ping Cheng wrote:
> Hi Dmitry,
> 
> On Tue, Nov 4, 2014 at 12:08 AM, Dmitry Torokhov
> <dmitry.torokhov@gmail.com> wrote:
> > On Sat, Nov 01, 2014 at 08:40:19AM +0100, Hans Petter Selasky wrote:
> >> On 11/01/14 00:27, Ping Cheng wrote:
> >> >If touch_input is NULL on FreeBSD, you need to figure out the root
> >> >cause. Checking on touch_input itself would not fix the root cause...
> >>
> >> Right.
> >>
> >> The root cause is that FreeBSD launches two instances of the driver,
> >> running in two different userland processes, for the two different
> >> Wacom interfaces on a common USB device. In Linux the wacom
> >> interface drivers are running from the same kernel, and can share
> >> the data in question, but in FreeBSD's webcamd emulation, this
> >> doesn't work. Then the first wacom probe call would have to grab the
> >> second interface.
> >>
> >> Technically speaking this is a FreeBSD only problem and I plan to
> >> deliver a patch with the webcamd software to fix this, like already
> >> suggested to you guys. This situation can also happen on Linux in
> >> case of a "BadUSB" device. That's why I think that the NULL check
> >> should be upstreamed.
> >
> > Hmm, looking at this again it seems that we just cross our fingers and
> > hope that both interfaces are enumerated by the time we get event data
> > from the device. I do not think this is quite safe. We probably should
> > be checking the overall state of probing (i.e. whether we are done
> > probing both interfaces) before processing data for the device.
> 
> Are you going to make a patch to address the issue?

Not in the nearest future, sorry.

> 
> > Or maybe we should just forcibly try claiming secondary interface
> > while probing primary instead of messing with shared data item.
> 
> If we incorporate the above idea into a patch, we need to keep in mind
> that not all tablets support touch data. So, not all tablets have two
> interfaces.

Right, but we do know the models that use multiple interfaces, right?

-- 
Dmitry

Re: Problems with Wacom Intuos PT M (CTH680) on FreeBSD

[Ping Cheng]

On Tue, Nov 4, 2014 at 10:06 AM, Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
> On Tue, Nov 04, 2014 at 09:38:38AM -0800, Ping Cheng wrote:
>> Hi Dmitry,
>>
>> On Tue, Nov 4, 2014 at 12:08 AM, Dmitry Torokhov
>> <dmitry.torokhov@gmail.com> wrote:
>> > On Sat, Nov 01, 2014 at 08:40:19AM +0100, Hans Petter Selasky wrote:
>> >> On 11/01/14 00:27, Ping Cheng wrote:
>> >> >If touch_input is NULL on FreeBSD, you need to figure out the root
>> >> >cause. Checking on touch_input itself would not fix the root cause...
>> >>
>> >> Right.
>> >>
>> >> The root cause is that FreeBSD launches two instances of the driver,
>> >> running in two different userland processes, for the two different
>> >> Wacom interfaces on a common USB device. In Linux the wacom
>> >> interface drivers are running from the same kernel, and can share
>> >> the data in question, but in FreeBSD's webcamd emulation, this
>> >> doesn't work. Then the first wacom probe call would have to grab the
>> >> second interface.
>> >>
>> >> Technically speaking this is a FreeBSD only problem and I plan to
>> >> deliver a patch with the webcamd software to fix this, like already
>> >> suggested to you guys. This situation can also happen on Linux in
>> >> case of a "BadUSB" device. That's why I think that the NULL check
>> >> should be upstreamed.
>> >
>> > Hmm, looking at this again it seems that we just cross our fingers and
>> > hope that both interfaces are enumerated by the time we get event data
>> > from the device. I do not think this is quite safe. We probably should
>> > be checking the overall state of probing (i.e. whether we are done
>> > probing both interfaces) before processing data for the device.
>>
>> Are you going to make a patch to address the issue?
>
> Not in the nearest future, sorry.

No problem. I just want to make sure we don't duplicate the work...

>> > Or maybe we should just forcibly try claiming secondary interface
>> > while probing primary instead of messing with shared data item.

I looked into the code. It is not a simple task to claim secondary
interface while probing the primary one. For some devices, there is no
easy way to tell if they have multi-interfaces or not before accessing
the data,

>> If we incorporate the above idea into a patch, we need to keep in mind
>> that not all tablets support touch data. So, not all tablets have two
>> interfaces.
>
> Right, but we do know the models that use multiple interfaces, right?

Some models may have same product ID but can have pen or pen and touch
interfaces. We'll have to request the device to be sure...

Since touch_input is the only shared data/pointer that should not be
called before all interlaces are probed, checking on touch_input when
it is called, as suggested by Hans, is a feasible solution. As a
by-product, it also fixes the FreeBSD issue.

I'll post my patch here soon.

Ping