Dear all, dear Peter,
As you know, bcm5974 touchpads do not report ABS_MT_PRESSURE, but ABS_MT_WIDTH
instead. Since libinput does not currently use ABS_MT_WIDTH, thumb detection is
inaccurate on those devices. When I switched from Mac OS to Linux, I stopped
using the Magic Trackpad solely for that reason. Now I decided it would be time
to get my favorite pointing device back. To do this, I would like to implement
thumb detection based on ABS_MT_WIDTH. Using these values has the additional
benefit of making thumb detection significantly more reliable, since the
eccentricity of a thumb can be deduced, which is typically much larger than that
of a finger.
Now I am wondering if this would be a welcome addition to libinput. When looking
through the mailing list I found the patch "touchpad: add touch-size based touch
handling". This would probably be a good basis to build on. Are you still
considering committing the patch to git?
Thanks for all your great work.
Best,
Friedrich
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