Phantom button presses from trackpad

Magnus Henoch <mangefreemail.hu> writes:

> I have an iBook G4 of early 2004, running -current, but
I haven't yet
> bothered to update X beyond 4.4.0.  I tried changing
the keyboard
> driver from "keyboard" to "kbd",
which gave positive results (more
> keys defined, less need for xmodmap), but also made the
trackpad
> behave strangely.  Whenever I put my finger on it, it
reports button
> 179 being pressed:

Whatever the cause was, the recent changes to ams.c fixed
it.  The
trackpad is now quite usable.  Thanks!

Magnus

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hello,

On Oct 17, 2006, at 08:50, Magnus Henoch wrote:

> Magnus Henoch <mangefreemail.hu> writes:
>
>> I have an iBook G4 of early 2004, running -current,
but I haven't yet
>> bothered to update X beyond 4.4.0.  I tried
changing the keyboard
>> driver from "keyboard" to
"kbd", which gave positive results (more
>> keys defined, less need for xmodmap), but also made
the trackpad
>> behave strangely.  Whenever I put my finger on it,
it reports button
>> 179 being pressed:
>
> Whatever the cause was, the recent changes to ams.c
fixed it.  The
> trackpad is now quite usable.  Thanks!

Good, the point of the change was to make tapping the pad
work as 
button one.
About the phantom buttons - all Apple trackpads I know
report more than 
one button ( two in the PB3400c, four in my iBook G4 ) - the
only one 
that's corresponding to a real life button is button one.
The others 
are (ab)used for stuff like signalling that there's a finger
on the pad 
( the two-button version uses button 2-4 for that, the
four-button 
version uses button 5 and reports button four as always
down).
The button count reported is bogus and ought to be read as
protocol 
revision or something.

So, has anyone ever seen an ADB trackpad that reports
something else 
than two or four buttons?

have fun
Michael
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (Darwin)

iQEVAwUBRTUVvMpnzkX8Yg2nAQK9OAgAmsRFJjNHlL1uU9Kt8aGGjIMDGye8
Gxcc
GCCjA/jl2CufG8GIWPYdhLp4GDQBW5inp+1pRfN+K2fw4ZcIlaI0Rg9h+T8t
w3BL
GvSX7ikNNha9TUg1JngsTIJHLd7hM41ReDKtJrC/cYDG7+XvO6aytIYlCD7Y
lbFw
3chKCn468kaVwpISxxFsV9mOJDma+C+PsNgskQzL9HQHMl2vP9VDsKlRI1xJ
4/s3
Leh3Utjd92CWBrsuCMc6oX6un1o3MxE19DSXnv0joGOjkOmRIHFA6zERUpqj
M10s
+LrZ4Sz6/um3C6Hs9mwPq2+NjqiF7yAI8dYpp/VLvy7076R2XmHqdA==
=w/2j
-----END PGP SIGNATURE-----