This is my raspberry version :
PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)"
NAME="Raspbian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
VERSION_CODENAME=stretch
ID=raspbian
ID_LIKE=debian
For what you says about terminal, I only tried to run lgpt with the terminal, nothing else. The fullscreen don't change the size compare to not full screen mode, it just make black color around the window. But for now this is not my big problem. It's audio...
I tryed speaker-test -c2 -t wav but I hear nothing... in analog or hdmi mode.
I tryed reinstallation of qjackctl, pulseaudio, alsa but nothing change
I'm thinking about reinstall completly my raspberry pi :-( the strange thing is that I remember in the past, before make all these updates, it worked, I used it to watch movie the sound was ok (I think it was 1 or 2 years ago).