Had these exact symptoms (lockup, not even sysrq working) on Ubuntu 16.04 with kernel 4.4.0-116 and 4.13.0-37 (booting to the "prior stable" kernel in each case, 4.4.0-112 and 4.13.0-36, worked successfully). There's quite a lot in the changelog (http://changelogs.ubuntu.com/changelogs/pool/main/l/linux-hwe/linux- hwe_4.13.0-37.42~16.04.1/changelog) so I wouldn't like to speculate on what exactly caused this, but I did find a fix in my case: remove the intel-microcode package.
I have a vague recollection of installing this from the "Additional Drivers" section of the updates system, but after booting to the older kernel, and running "sudo apt purge intel-microcode" I found I could successfully reboot in the newer kernel. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1760377 Title: Ubuntu 17.10 freezes on login with kernel 4.13.0-37-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1760377/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
