It wasn't expected that the system would not boot. The 4.8-rc1 kernel is now available, can you give it a try:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc1/ ** Tags removed: kernel-key ** Tags added: kernel-da-key -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1602577 Title: [arm64] compute nodes unstable after upgrading from 4.2 to 4.4 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1602577/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs