BBB strange behaviours

I’m Davide and this is my first post in this group.

I’m using a BBB and I’ve installed the last image of Debian
Kernel versionThere are two things that for me are inexplicable:

  1. I connected the TFT cape 4DCAPE-70T, at first it didn’t work, but I make it work adding in /boot/uEnv.txt:
  2. Even though in /etc/network/interfaces there are no eth0 interface available.
    If I list all the board connection there is an eth0 dhcp connection, and I cannot remove it?
    Thank you for the attention.