Sadly issue returned with kernel 4.13.0-35. As i can see from changelog some Spectre patches have been changed to different approach to fix this issue. So this is probably reason for this behavior.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1742675 Title: after upgrade to linux-image-extra-4.13.0-26-generic the system does not start at all To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1742675/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs