As far as I can tell from http://pkgs.fedoraproject.org/gitweb/?p=xorg-x11-drv-synaptics.git, Fedora just ships the upstream tarball, so it doesn't have debian/patches/120_active_touches_num_fingers.patch, which is what is causing the issue.
I did have a thought though. If I understand the patch correctly, it expects to have a pair of touch coordinates for each finger, and then only increments active_touches if they fall in the active region of the touchpad. Since the elantech touchpads only report a single pair of coordinates for three finger taps, the maximum for active_touches is only 1. My thought was to keep track of how many pairs of coordinates were received, both in active and inactive regions, and then do a sort of sanity check before using the active_touches data. If the number of pairs received is 1 when we receive a SYN_REPORT, but the kernel didn't send a single tap event, then something is wrong, and we probably should just go with what the kernel sent us. To keep track of the pairs of coordinates, I've been using ABS_MT_TRACKING_ID, and incrementing the number of pairs when it is not -1, decrementing otherwise. This fixes the issue for me (triple taps work again), but it is really more of a rough idea at this point, since I am not very familiar with the synaptics xorg driver. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/873482 Title: elantech: Touchpad always reports 3 finger tap as 1 finger tap To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/873482/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
