Re: Persistence not working?
What changes did you try to make?
If persistence is working, it will store certain settings like timezone and network or wireless security settings. And you can add programs that you run after you boot.
However, the system boots a fixed squashfs filesystem before persistent data is mounted, so you cannot add video drivers, update kernels, remove default programs, or stop it from booting as default user "ubuntu" who can do about anything with no password. So even though you can add users with passwords, anything the other users do that is not encrypted could be accessed by the default "ubuntu" user.
i5 650 3.2 GHz, 8 GB, nvidia GTX 550 Ti 32" 1080p | i7-4700, 8 GB, Intel HD 4600/nvidia GTX 765M 15.6" 1080p | etc.