Public bug reported: A test app that demostrates this bug can be downloaded from here: lp:~jpakkane/+junk/touchpad-tester.
My setup is that I have a Magic Trackpad and a Macbook Pro multitouch trackpad. The test app prints out this: Using device id 2, Virtual core pointer. Potential device id 11, bcm5974. Potential device id 13, Apple Wireless Trackpad. If I use device ids 11 or 13, stuff works. Device id 2 leads to problems, though. I put down five fingers on one touchpad and then five on the other. Then I lift all fingers up simultaneously. The end result is that I only receive TouchEnds for roughly half of the touches. The others keep on existing. Possible reasons for this bug include X not sending touch end events or X sending touch end events with a different device id than touch start events. Tests were run using precise. ** Affects: xorg-server (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/929408 Title: X does not send multitouch touch end events properly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/929408/+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