desktop-packages team mailing list archive

[Alexia Death <863154@xxxxxxxxxxxxxxxxxx>]

m-marti, is your mouse for some reason enabled as an extended device? If
yes, disable it.  You wont lose anything as mouse does not provide any
extra info for extended devices.

As far as I am aware from my testing with mmiicc, it only affects
extended devices and a specific event deliver mechanism known as event
history buffer that is provided by X. It's a known source of trouble.
According to my tests with mmiicc 2.7 does not exhibit this problem
because of this commit:
http://git.gnome.org/browse/gimp/commit/?id=dbf844c012894166e312470f0d98560d5e426613
With this I disabled the history buffer use because there are plenty of
cheap tablet drivers that get it permanently wrong and 2.7 has event
fill that prevents even mice from drawing polygons when moved fast, so
milking every single event out of the device is no longer essential.

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https://bugs.launchpad.net/bugs/863154

Title:
  Wacom Bamboo One tablet random coordinate malfunctions

Status in “gimp” package in Ubuntu:
  Confirmed

Bug description:
  The tablet in overall seems to work correctly, with all pressure-
  features working. But quite frequently, while drawing, GIMP seems to
  wrongly read the coordinates of the stylus (as zeros, or negative
  values?), resulting in frequent, random 'line-peaks' in the direction
  of the left and upper image edges. With this bug it is hard to even
  use the tablet, since these problems are very frequent (see the
  exemplary image attached).

  The tablet works with no problems in MyPaint. The bug is reproducible
  in both Unity-2d and Unity-3d.

  I also notice the CPU usage increasing dramatically during drawing
  with any brush.

  Steps to reproduce:
  1. Connect the Wacom Bamboo One tablet
  2. Open GIMP
  3. Start drawing longer strokes with any brush

  Expected result:
  The brush stroke as intended by moving the stylus

  Actual result:
  The brush stroke as intended with frequent, random line-strokes towards image edges

  System: Ubuntu 11.10 oneiric (development branch)
  GIMP version: 2.6.11 (package version: 2.6.11-2ubuntu3)

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