I had the same issue with installing OpenVPN and it hangs at openvpn.postinst. My 17.10 was a fresh install in October, not upgraded from 17.04.
'plymouth --ping' seems to be the root of the problem. I had to 'kill -9' three (!) times. Since it was asked above, I attach the result of 'ps fauxw'. ** Attachment added: "openvpn-postinst-hang.log" https://bugs.launchpad.net/ubuntu/+source/openvpn/+bug/1725525/+attachment/5008538/+files/openvpn-postinst-hang.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1725525 Title: Cannot complete installation in Ubuntu 17.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openvpn/+bug/1725525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs