Upgrading from 12.04 to 14.04 was a real no-pain-no-gain feast.
My Acer Laptop has two graphic cards: an ordinary Intel and a nVida 640m. Probablly because of this I had to try twice before looking at a good Trusty installation, struggling with the infamous low-graphics mode error.
Now my Tahr is up and running and these are the steps I’ve made after the first boot.
A 3d scanning of me, by Martin Romeo, via ReconstructMe + Sketchfab.