There was a bug in Qt 4.6 that caused a problem with tablet pressure. Some other distributions have patched it, but I'm not sure it's in Lucid Lynx already. You can try to report it to Kubuntu.

As tablet support in Krita is handled by QT, you also need to have a tablet that is supported by QT. My experience thus far is that this basically means an actual Wacom brand tablet. No Trust / Medion / Aiptek / N-Trig tablets, even with the latest QT, it seems unfortunately.

What band / model of tablet do you have?

Kubuntiac wrote:As tablet support in Krita is handled by QT, you also need to have a tablet that is supported by QT. My experience thus far is that this basically means an actual Wacom brand tablet. No Trust / Medion / Aiptek / N-Trig tablets, even with the latest QT, it seems unfortunately.

What band / model of tablet do you have?

Oh whoops. I can't believe I forgot to give that information. I have a Wacom Intuos3 6x8 graphics tablet.

... so it must have something to do with Qt, right? Bugger. :/

Actually that's good news. I used an Intuos3 with Krita last week, so it should be doable... with the right version of QT

Other brands are almost guaranteed (presumably with some exceptions) not to work, from what I understand. Dev's, please correct me where I'm horribly wrong

slangkamp wrote:There was a bug in Qt 4.6 that caused a problem with tablet pressure. Some other distributions have patched it, but I'm not sure it's in Lucid Lynx already. You can try to report it to Kubuntu.

I'll report it... but I doubt that they'd fix it anytime soon. Is there a way to install a patched/latest Qt without completely ruining my installation?

Kubuntiac wrote:Actually that's good news. I used an Intuos3 with Krita last week, so it should be doable... with the right version of QT

Other brands are almost guaranteed (presumably with some exceptions) not to work, from what I understand. Dev's, please correct me where I'm horribly wrong

What version is the right version?

Kubuntiac wrote:Other brands are almost guaranteed (presumably with some exceptions) not to work

Is this still true ? It is a pity to have to use gimp instead of krita.

Yes, that's still true. You might be lucky and have some tablet that is supported by Qt, but it's unlikely. If you have, please let us know so we can collect the information.

No, I tried to make it work with krita, but failed, while it works with gimp.

@partymetroid
Try removing the driver, atleast for me pressure sensitivity only worked whithout any additonal drivers installed.

Edit: Ow, sorry didn't see how old that post was.

Sorry for bringing to the front this old thread.

I know that in Ubuntu Natty there is a problem with Wacom tablets, the pressure sensitivity does not work with Qt apps:
https://bugs.launchpad.net/ubuntu/natty ... bug/762938

Well, I have a Genius i405 graphics tablet, which uses the drivers Wizardpen:
https://launchpad.net/~doctormo/+archive/xorg-wizardpen

I have exactly the same problem. The pressure sensor in MyPaint and GIMP works, but does not work in Krita and Pencil.

Is it the same problem? Or Wizardpen drivers are not supported by QT?

On Kubuntu 11.04 Natty 64bits.

I think wizardpen isn't supported by Qt at all -- makes me quite sad. Maybe we should take over maintenance of the Qt tablet api now Qt is open governance...

If the Wizardpen driver is compatible with Wacom it might work with Qt. It's likely that in that case the Natty bug also affects other tablets.

What do you mean they are compatible? I completely uninstalled the Wacom drivers and my Genius tablet is still working in GIMP and MyPaint. I guess the wizardpen driver does not depend of Wacom drivers. So that is what I should do? Should I report this somewhere? Where?
Thanks.

boudewijn wrote:I think wizardpen isn't supported by Qt at all -- makes me quite sad. Maybe we should take over maintenance of the Qt tablet api now Qt is open governance...

This sounds amazing... if it didn't become overwhelming. It seems like a nice balance though between wanting to be able to fix bugs in the tablet code and wanting fixes upstream.

Easy for me to say though. I won't be doing the work!

Hi guys.

I have G-Pen 450 and Kubuntu 12.04 64bit. And G-Pen PRESSURE does not work in Krita. Also, i'm going to buy G-Pen M712X which is more advanced.
G-Pen 450 PRESSURE works with Gimp, Blender, MyPaint, Inkscape. I did not install wizardpen driver. So my tablet was detected by Kubuntu automatically.

Also, recently I bought 3d-coat software (linux version) made by Ukraine devs and asked the devs to support g-pen PRESSURE. They did it during one week.

I would like to ask Krita devs for supporting G-Pen preassure. As there are many people who use non wacom tablets. I'm a professional 3d artist and i want to use Krita for development.

Also, i can donate 100$ for the developer who can add G-Pen pressure support.

Thanks.