I am in Linux Mint 18.3 KDE with Plasma 5.8 LTS.
Can I install 5.12 LTS? How?
Mint 18.3 has already the kubuntu-ppa/backports PPA enabled but this doesn't go above 5.8 in ubuntu-16.04-based systems.
As far as I know the Neon PPA brings the very latest Plasma - I only want the LTS 5.12 but that's the latest as I write - but I cannot add that repository:
~ $ sudo add-apt-repository ppa:project-neon/ppa [sudo] password for cip: 'This PPA does not support xenial' Cannot add PPA: ''This PPA does not support xenial''.
That's odd, as Neon is based on Xenial, just like Mint 18.
The same with kubuntu/beta:
~ $ sudo add-apt-repository ppa:kubuntu-ppa/beta 'This PPA does not support xenial' Cannot add PPA: ''This PPA does not support xenial''.
What worked was ppa:kubuntu-ppa/staging-plasma, but that has provided only an upgrade from 5.8.8 to Plasma 5.8.9.
Why can Neon use a Xenial base for latest Plasma but other Xenial-based systems cannot? Or can they? and simply there isn't a ppa for that?
How come the Xenial-based Neon PPA says that it doesn't support Xenial?