Anders, your follow-up message doesn't state what error message you're seeing on upgrade. There's nothing I see linking your problem to this bug report. There is certainly no generic "critical error" on upgrade for users who are not manually modifying the state of /etc/resolv.conf on their systems.
In response to your point 2) in particular, manually configuring nameserver settings in /etc/resolv.conf, rather than using either dhcp- provided settings or configuring in /etc/network/interfaces, is strongly discouraged. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1000244 Title: Symlink /etc/resolv.conf does not exist after installation or upgrade of resolvconf -- various causes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1000244/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs