Public bug reported: The mx4 touch screen sends a BTN_TOOL_FINGER key event during the touch down and up.. This interferes with position tracking inside libinput and leads to invalid positions being reported and in some cases jumping of the position just before the release of a touch contact.
There is a fix posted at the libinput mailinglist, but those have not been applied yet. (Peter is on vacation). Latest update of the touch screen patches (these will compensate the initial jumping of touch contacts , but not fix the mx4 issue) http://lists.freedesktop.org/archives/wayland-devel/2015-September/024168.html The last step, the actual mx4 fix: http://lists.freedesktop.org/archives/wayland-devel/2015-September/024171.html ** Affects: libinput (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libinput in Ubuntu. https://bugs.launchpad.net/bugs/1504168 Title: fix handling of mx4 touch screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1504168/+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
