Sorry to spam this bug with comments, but I just found out a workaround to my problem. I had to disable IPv6 on the network connection (setting Method to ignore). Not sure why I need to do this in 16.04, but this isn't needed in 14.04.
After doing this, the internet connection doesn't drop at all anymore. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1434986 Title: Not working network connection after boot To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/1434986/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs