Comment 1 for bug 399787

Marking this Fix Released for the actively developed Karmic kernel. It also appears this has recently been applied to the Jaunty kernel git tree:

https://lists.ubuntu.com/archives/kernel-team/2009-July/006524.html

ogasawara@yoji:~/ubuntu-jaunty$ git log a6123b04d1c81e8210bdd1d9507f341286873de1
commit a6123b04d1c81e8210bdd1d9507f341286873de1
Author: Peter Hutterer <email address hidden>
Date: Thu Nov 20 15:24:42 2008 -0500

    Input: synaptics - report multi-taps only if supported by the device

    BugLink: https://bugs.launchpad.net/ubuntu/+bug/399787

    commit e42b6646a8298fe06a33a0f68dab661335f5db6e upstream

    According to Section 2.4.4 of the Synaptics TouchPad Interfacing
    Guide, bit 2 specifies if multi-finger detection is provided by
    the touchpad. Thus, only set BTN_TOOL_DOUBLETAP and
    BTN_TOOL_TRIPLETAP if the device actually supports it.

    Signed-off-by: Peter Hutterer <email address hidden>
    Signed-off-by: Dmitry Torokhov <email address hidden>
    Signed-off-by: Alberto Milone <email address hidden>
    Acked-by: Stefan Bader <email address hidden>
    Acked-by: Tim Gardner <email address hidden>