@PhilJ, I think you hit this bug: https://bugs.launchpad.net/bugs/1882890 Could you please try to update the intel-microcode package to version 3.20200609.0ubuntu0.18.04.1 (just uploaded to bionic-security a few hours ago) and confirm it fixes your problem?
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1854764 Title: Dell 5280 hangs on warm reboot after upgrading intel-microcode package To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1854764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
