The instructions the original reporter links to, for debugging touchpad issues in Ubuntu, is outdated. The way it seems to me, 18.04 Bionic Beaver uses the libinput drivers instead of synaptics by default. At least that is the case on the LiveCD. Therefore, this bug report is linked to the wrong component - understandable due to misleading documentation.
Furthermore, my initial analysis of the root cause was way off. The real issue is that the palm detection threshold for this particular model is set too low in libinput. Consequently, spurious palm detection events make the touchpad temporarily unresponsive. I've submitted a patch for this quirk upstream. -- 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 : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
