The full error is:
MySQL ERROR 13 (HY000): Can't get stat of './databasename' (Errcode: 13 - Permission denied)
I can't create databases in the mysql shell. I can log in as root just fine and I've granted all privileges to the root user, flushed privileges and exited/logged back in multiple times. Nothing seems to work.
I'm on Ubuntu GNOME 15.04. This worked fine on 14.04, but I'd rather not downgrade if I don't have to.