This is getting weirder and weirder. I updated my packages and tried
again. Now the behaviour is different. Just adding the struct elements
does *not* break pressure. Previously it did. I verified on previous
test results I had written down with an actual pen and paper.

What happens now is slightly different. Patch 503 has three different
parts: two code changes and the struct change. If I take out the first
code part, I get pressure. Taking out only the second code part does
give pressure. However I cannot for the life of me understand why this
happens. The code in question does not handle pressure in any way, only
coordinates. Somehow the first code block triggers loss of pressure.

If I play the same recording without a Krita window, I get a drag
selection box. So transforming the pen to movement+mouse click works.

I suspect that this bug may be platform specific. Can everyone tell what
platforms they are using? My tests are run on 32 bit x86 oneiric.

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https://bugs.launchpad.net/bugs/799202

Title:
  wacom stylus jumps with latest xserver-xorg-core

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