Palm rejection is only for when the palm of a hand (not figures or thumbs) is touching the touchpad. Because a palm is larger than a finger it's usually easy to recognise and ignore. However in the attached photo, only a finger can be seen touching the touchpad so it will not be rejected as a palm. Maybe the photo doesn't accurately show the problem occurring? But if the photo in comment #1 is correct then palm rejection is not the problem.
Please also run this command to attach relevant system information: apport-collect 2122154 ** Changed in: libinput (Ubuntu) Status: New => Incomplete -- 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/2122154 Title: Palm Rejection doesn't work on a Canonical-supported laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/2122154/+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