I know you tried :). I'm not assigning blame here as I would've done the same based on the documentation available.
According to my earlier comments, I ran into the same issue on Fedora, reported it here https://bugzilla.redhat.com/show_bug.cgi?id=1575260 and got excellent support. One of the libinput devs caught it and helped me out. I would suggest stepping through the same process as I did by following the comments on that report, but filing a bug directly at https://bugs.freedesktop.org/enter_bug.cgi?product=wayland&component=libinput as it is an upstream issue. On Ubuntu, however, you might have to install some of the libinput debugging tools separately. If we're lucky, and as our hardware is really similar, the same palm detection threshold might work for you as well like this: # MacBookPro5,4 (Mid 2009) libinput:name:bcm5974:dmi:*:svnAppleInc.:pnMacBookPro5,4:* LIBINPUT_ATTR_PALM_SIZE_THRESHOLD=1000 ** Bug watch added: Red Hat Bugzilla #1575260 https://bugzilla.redhat.com/show_bug.cgi?id=1575260 -- 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/1764097 Title: 'Apple touchpad bcm5974' is temporarily unresponsive after a few seconds of continuous input in 'Apple MacBookPro5,4 (mid 2009)' after upgrading to 18.04 Beta 2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1764097/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

