Thanks again for testing. It's sounding like this was introduced by a SAUCE patch in the 4.13 kernel. Can you next test the first 4.13 kernel that came after 4.12.0-13:
4.13.0-10: https://launchpad.net/~canonical-kernel- team/+archive/ubuntu/unstable/+build/13358561 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1734327 Title: Kernel panic on a nfsroot system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734327/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs