@Erik: WTF, you have three buttons on the Touchpad? I only have two on
the touchpad and three on the trackpoint.  I'm not really surprised that
this breaks the driver as it is. We'll have to do further research on
your model.

[Background: 9-byte packets on my model are marked by having all three
touchpad buttons set (even if none is actually pressed). That's how the
code currently detects a 9-byte packet coming in -- and of course, if
there's no 9-byte packet actually there, we're desynced.]

@Dave: Input layer is not guilty here. A release event for the dev2 is
not being sent, so the buttons sticks. This is a bug in the Alps driver.

So to be clear, you guys all seem to have M4400's with three buttons on
the touchpad AND the trackpoint?

I'll prepare a new patch to dump debug info for the M4400 style
dualpoint device.

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