registry team mailing list archive

[Alexander Hunziker <alex.hunziker@xxxxxxxxxxxxx>]

This turns out to be a combination of several issues:

The kernel driver likely does not have a driver for the touchpad which
supports multiple fingers. The touchpad however does support reporting
fingerwidth and can therefore be used with two-finger emulation.

Two-finger emulation cannot be turned on using the Gnome Mouse capplet.
See Gnome bug #625163

Even if one turns on two-finger emulation using the xinput interface,
two-finger scrolling does not work. This is because, on Ubuntu, the
default value for the property "Synaptics Two-Finger Pressure" is 280,
which is much too high. A Fedora 14 Live CD i booted for testing, had a
default value of 29 for that property. Indeed, lowering that value under
Ubuntu makes Two-finger scrolling work. See the upstream bug for more
info.

I don't know why this pressure default value is wrong on Ubuntu. It
could be due do a different synaptics version, or due to a patch in
Ubuntu?

-- 
Touchpad on Thinkpad T400s doesn't support two-finger scroll
https://bugs.launchpad.net/bugs/648671
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