I forced a downgrade of intel-microcode from "" to "", regenerated the initrd images, and now they seems to boot correctly!
So, the problem seems to be with latest intel-microcode? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882890 Title: Cannot boot initrd.img-4.15.0-106-generic on Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1882890/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs