Sebastian,

I've uploaded a Youtube video demonstrating the bug.  I'm certain that
I'm only using your patch, as I performed a clean installation before
doing my testing.  I'm using an m4400, which seems to have the same
Dualpoint.  You're right that the patch is a vast improvement, but the
buttons will still probably be a showstopper for me.  I'd be happy to
provide any command input (lsusb, etc.) you want to see, or gather any
other information you need.  Just let me know.

http://www.youtube.com/watch?v=GqSZ-mftheM&fmt=18

There are no apparent errors in the dmesg output.

Interestingly enough, regardless of whether or not I'm currently
experiencing the bug, I can reliably cause the driver to lose sync by
pressing all three of the touchpad buttons at once.  Pressing all three
of the stick's buttons do not cause the driver to lose sync.  I don't
know if this bug is related--it's certainly probably an uncommon
problem.

Erik

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ALPS DualPoint Touchpad flaky performance
https://bugs.launchpad.net/bugs/296610
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