@Emmanuel
If you get an error installing sudo apt-get install libgl1-mesa-dri/xenial-proposed, temporarily remove the file `/etc/apt/preferences.d/proposed-updates`
Add that file again afterwards to prevent upgrading all packages in proposed.
Package: *
Pin: release a=xenial-proposed
Pin-Priority: 400
@Emmanuel mesa-dri/ xenial- proposed, temporarily remove the file `/etc/apt/ preferences. d/proposed- updates`
If you get an error installing sudo apt-get install libgl1-
Add that file again afterwards to prevent upgrading all packages in proposed.
Package: *
Pin: release a=xenial-proposed
Pin-Priority: 400
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed