Putatieve, Seems like you have the bionic HWE installed, so that is why your server is defaulting to 4.15. Your apt log shows 4.4 downloading so you should be able to manually boot into it from grub...
Personally I'm hoping an update drops to bionic proposed as Xenial was not part of my original testing.... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1813873 Title: Userspace break as a result of missing patch backport To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813873/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs