Problem with ABS_PRESSURE:

[blenderli]

Hello everyone, I'm not sure if I'm in the right place with my problem with my Wacom Cintiq Pro 24. The ABS_PRESSURE: reacts very weakly. I have to apply a lot of pressure for anything to happen when drawing. In the libinput debug-tablet test, the ABS_PRESSURE only comes on the fourth or fifth stroke. Gnome settings don't respond at all. I tried changing the sensitivity to 8192 (66-wacom file) as specified by the manufacturer, but I don't think that worked. Do you have any idea how I can fix this? Many thanks in advance.

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[Pinglinux]

Let's take a look of your kernel driver first. Please share the output from the following commands on your system:
$ uname -a
$ modinfo wacom
$ sudo dmesg

[blenderli]

Hello thanks for your message. So here is all what you like to know? I hope.

Linux_wacom_spec.txt

best regards

[Pinglinux]

The output looks fine. Do you have another stylus to test with? Or. do you have another system to test with, like on a Windows PC? I want to make sure the pen is in good condition.

[blenderli]

Hello Pinglinux thanks for the help so far. I'm sorry that i took so long. I was really busy. So i tested my pen on a Ubuntu on a smaller wacom tablet. There was no issue Pen work well. So i took my second pen from work to test on the Wacom Cintiq Pro 24 Pad an this one work perfect. Here a screenshot. I'm so confuse now.

But there are still some Issus like:
event8 - Wacom Cintiq Pro 24 Pad: libinput bug: missing tablet capabilities: pen resolution. Ignoring this device.
and some evdev are slow but i have a be-fee maschine.

[Pinglinux]

It could be that the stylus you were having problem with wasn't meant for Cintiq Pro device. What is your smaller tablet's model?

The "libinput bug: missing" is most likely just a warning since pad is for the buttons on the tablet. It is not a pen and doesn't have pen resolution. I'll let @whot take a look.

[whot]

the libinput warnign indicates that ID_INPUT_TABLET is set by udev but ID_INPUT_TABLET_PAD is not set (otherwise libinput would take it as a pad). Maybe a missing or broken installation of libwacom? Or some hand-made udev rules?

Do you have opentabletdriver installed and possibly taking over that device? (shouldn't be, I don't see that PID in the source but still). Or some other input remapping utility?

[blenderli]

Thanks for you help pinglinux. So the small tablet is Wacom Intuos Pro PTH-460. I didn't try the opendriver because the Wacom Cintiq Pro 24 is not supported. I try to reinstall libwacom many time. So do you think i should install the opendriver?

[whot]

honestly, this looks like either the kernel driver is buggy or the pen isn't correct.

ABS_PRESSURE is the data we get straight from the kernel so if that one doesn't show the right range then there's nothing in userspace we can do to fix it. maybe try a newer (or older kernel) to see if that changes things.

Also, what is the tool ID (not serial) for the pen when brought into proximity, iirc libinput debug-tablet shows that, otherwise there's libwacom-show-stylus. This will help us identify if the pen is compatible.