The installation to hdd of Ubuntu Mate 18.04 is really bad work!
I’ve tried is more than one time, but it breaks every time the installation!
I’ve some hdd with lvm volumes for virtual machines with linux distributions. The Ubuntu Mate installer searches always inside (!!!) of every lvm volume for partitions and on installation it tries to format the swap partitions inside the lvm volumes, without any permission (nothing is selected to format!!!). This try to format the swap partitions inside the lvm volumes gets an error and the whole Ubuntu Mate installation stops working!
Stop seaching for partitions inside of lvm volumes and don’t format anithing without any permission!!!
That’s the worst installation I’ve ever seen!