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[Bug 762938] Re: Wacom Pressure broken with Qt applications

 

** Description changed:

- Binary package hint: pencil
+ SRU Justification:
+ 
+ Impact: Wacom tablet users rely on pressure information for drawing in
+ applications like Krita and Pencil. When the multitouch Qt patches were
+ added to Natty, they disabled the pressure support. This is a fairly
+ major regression of functionality.
+ 
+ How Addressed: The multitouch patch disabled XInput 1.x support in favor
+ of XInput 2.1 support. According to the original patch developer, Denis
+ Dzuybenko, this was likely an oversight due to how the patch was
+ developed. After re-enabling XInput 1.x support, pressure data from
+ Wacom tablets began working, and touch input functioned normally.
+ 
+ Patch: http://bazaar.launchpad.net/~kubuntu-
+ packagers/qt/ubuntu/revision/173
+ 
+ Test Case:  Install krita or pencil and try to draw with a wacom tablet.
+ See it not work.  Install the updated package.  Try again.  See it work.
+ Note: This test case requires specialized hardware to execute.
+ 
+ Regression Potential: Minimal. This patch merely re-enables lost
+ functionality. The only concern is whether this will disrupt the XInput
+ 2.1 multitouch functionality, but in theory it should not and testing
+ shows this to be the case.
+ 
+ -----
  
  I've noticed Wacom pressure is broken with QT applications only: it works with gimp and Mypaint,
  but not in Krita or Pencil (I'm using Krita git-master development version, so I couldn't make a report on Krita package but it is concerned too.. I installed Pencil just to confirm it happens also with a package from the repository, and it's almost the only other pressure-sensitive drawing QT application I know ).
  Some idea: I reported this bug to Krita developers, one of them thinks it may be caused by some "Ubuntu specific" modifications for tablet-pc, as it doesn't happen on a Debian with the same version of KDE+QT+linuxwacom…
  
  TEST CASE:  Install krita or pencil and try to draw with a wacom tablet.
  See it not work.  Install the updated package.  Try again.  See it work.
  Note: This test case requires specialized hardware to execute.

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https://bugs.launchpad.net/bugs/762938

Title:
  Wacom Pressure broken with Qt applications

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