Comment 83 for bug 565543
Full article (not long) follows.

"Multi-Touch For The X.Org Synaptics Driver

Posted by Michael Larabel on October 08, 2010

Takashi Iwai of Novell/SuSE has just published a series of 18 patches
for the X.Org Synaptics input driver that primarily provides
multi-touch support. There's also some fixes and other changes to this
Synaptics driver for X, but the primary feature is the addition of
multi-touch support under Linux (and other X.Org-using operating
systems) for supported hardware.

It turns out that Takashi actually wrote these patches some months
ago, but that Novell's legal department didn't allow him to publish
the code for upstream integration over concerns of possible patent
infringements. This was mentioned on the mailing list.

However, after this work was independently discovered, Takashi has now
went ahead and mailed out the patches for hopeful integration."

On Sun, Oct 24, 2010 at 4:47 AM, Vladimir Hidalgo
<email address hidden> wrote:
> That's good news Paul-Sebastian Manole, would you mind to post any
> source of that information?, I would like to stay tuned for a patch.
> --
> Alps touchpad detected as ImPS/2 Generic Wheel Mouse(in VAIO E series) after the kernel upgrade
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> of the bug.
> Status in “linux” package in Ubuntu: New
> Bug description:
> Initially the ALPS touchpad was detected by the kernel but does not support horizontal and vertical support but after the kernel upgrade to 10.04 vertical scroll is working but horizontal scroll is not working. And the kernel is not detecting the ALPS touchpad and the cat /proc/bus/input/devices says it is a  PS2 mouse ..
> This is seen in sony vaio E series in particular ...
> Also Bill in Comment #52 says
> Acer Aspire One 532h (Alps touchpad).
> I booted the distribution from a thumb drive, but once I installed from the thumb drive and updated Ubuntu (10.04), I lost the touchpad (works as a mouse) ..
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