ubuntu-x-swat team mailing list archive

[David K Levine <742567@xxxxxxxxxxxxxxxxxx>]

Unlike swap axes, the coordinate transformation does not work properly
at least not with all devices. First, the wiki is in error, the correct
transformation for a rotate left is 0 -1 1 1 0 0 0 0 1 and not 0 -1 0 1
0 0 0 0 1. However with Ubuntu 11.04 and a Lenovo S-10t3 when the axes
are reversed with this transformation touching the screen results in the
correct location of the pointer, but dragging on the screen causes the
pointer to jump wildly from the correct location to an alternative
location. It's hard to see in what sense the problem has been fixed by
dropping a procedure (swap axes) that worked and replacing it with one
(coordinate transformations) that doesn't work.

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https://bugs.launchpad.net/bugs/742567

Title:
  multitouch events do not respect swap/invert axes properties