This issue has been resolved for me in "testing". This is how I resolved it without being able to start a gnome session: 1. Use GRUB to boot into recovery mode under advanced 2. Login to root when password is asked for 3. Run "ifup -all" 4. Run "dhclient" 5. Run "apt update" 6. Run "apt dist-upgrade" 7. Run "exit" 8. When you get to the login page, restart the computer because your network might be a little wonky at this moment. 9. Continue using Debian testing
Danny
