I used the scripts at https://github.com/cawilliamson/ansible-gpdpocket just in time for them to become out of date!

edit : Just re-installed using Mint Cinnamon from the link t-b sent. Install just as painless as before, sound works without needing me to fettle it, and the password prompt rotation is correct. Under System Settings->Preferences->General set the desktop scaling to 'Double (Hi-DPI)' and the desktop settings are near perfect.