Current issues:

  • Ubuntu versions prior 18.04: Please mark that this bug affects you, too: https://bugs.launchpad.net/ubuntu/+source/pyqt5/+bug/1755898

Removing packages from the PPA:

There is a separate page with all instructions.

Can’t find feature … that’s usually included in Cura

You probably need to install the specific plugin, you can also add all the plugins by installing cura-extra-plugins-all. You can get a list of available plugins (and all packages) using the Synaptic Package Manager, by viewing the LP-PPA-thopiekar-cura/... origin.

Ultimaker 3 Connect button is missing

You probably need to add the plugin for UM3 network printing. You can install cura-extra-plugin-um3networkprinting or all the plugins by installing cura-extra-plugins-all.