[Bug 550625] Re: Alps touchpad is recognized but synaptics clients and scrolling do not work

[Andrew Skalski]

Sorry that I haven't had the time to follow up on this in a while.  If
upstream is holding out for multitouch specs, then I wouldn't hold my
breath waiting.  From what I could tell, when I looked at it, the
multitouch support in Windows is handled by the user-space driver, and
not by the hardware.  So if we want that support, we're on our own.
I've decoded enough of the protocol that a full-featured driver can be
written (with the possible exception of sensitivity adjustment; though
based on the Windows driver initialization, that *might* be the job of
registers 0x14d and 0x163.)  But the implementation will need to handle
basically everything: tapping, dragging, scrolling, gestures, etc.

@mättu (#183): Try setting register 0x0005 to the value 0x03 (IMPS
emulation + Disable hardware tap)

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Alps touchpad is recognized but synaptics clients and scrolling do not work
https://bugs.launchpad.net/bugs/550625
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