Mouscursor (still) jumps - and a solution without recompiling the sources

Software
1

As this issue still is around in 2024 here is a workaround that that does not need you to recompile kicad:

gcc -shared -o libwarppointerpatch.so -E - << xxx
#include <stdio.h>
void $(strings $(which kicad)|grep WarpPointer)(void *_this, int x, int y) {
        printf("WarpPointer(%d,%d);\n",x,y);
}
xxx

then run kicad with:
LD_PRELOAD=$PWD/libwarppointerpatch.so kicad

Ok, it would be easier if “somebody” just commented out that WarpPointer in the sources, but that ain’t gonna happen.

2

Was the issue ever reported on the issue tracker?

Can you record a video of the issue?

3

Good question. As there exist other threads in this forum that mention this bug I’m quite sure other people are bitten by it, too, and hopefully “somebody” raised the topic on the issue tracker. But if they were as lucky as myself and did not find the issue tracker then probably not.

I’ll try to record a screencast, but all that happens is this:

  • open a schematic
  • select a part
  • press “M”
    → WarpPointer(705,346); - the coordinate is the in the lower right corner of the drawing area → schematic starts to scroll franaticly.

This happens only with specific pointer devices. In my case it’s the trackpoint (Lenovo T480) and the transformation matrix is set to:
$ xinput --set-prop ‘TPPS/2 IBM TrackPoint’ ‘Coordinate Transformation Matrix’ 1 0 0 0 1 0 0 0 0.1

In an other thread it was mentioned that this happens as soon as the last parameter of the transformation matrix is != 1

4

Ok, found the issue tracker and it was not reported before: