Comment 16 for bug 985121

That doesn't help---ginn is not already running. I did dig a bit deeper though:

1. The standard Unity gestures (two-finger tap, two-finger scrolling,
three-finger tap) *do* work. So, whatever problem the people in the
thread you linked were having, they are solved by now, at least for me
and on my hardware.

2. Unity plays a role in this story. If I launch the Gnome Shell
instead of Unity, I *can* run ginn (i.e. I don't get an error message
at all, and gestures are at least recognized). It is only under Unity
that ginn errors out.

3. Even under Gnome Shell, though ginn recognizes the gestures (I see
the log output in the terminal), only some actually seem to work. For
instance, I successfully bound a four-finger tap to the Super key,
which in Gnome Shell presents the workspaces. However, I was unable to
bind three-finger drags up or down to next/prev workspace.