This bug was fixed in the package intel-microcode - 3.20200609.0ubuntu0.20.04.1
--------------- intel-microcode (3.20200609.0ubuntu0.20.04.1) focal-security; urgency=medium * REGRESSION UPDATE: some CPUs in the Skylake family sig=0x406e3 fail to boot (LP: #1882890). - revert 06-4e-03/0x000406e3 microcode from 0x00dc to 0x00d6 sig 0x000406e3, pf_mask 0xc0, 2019-10-03, rev 0x00d6, size 101376 -- Steve Beattie <sbeat...@ubuntu.com> Wed, 10 Jun 2020 08:34:20 -0700 ** Changed in: intel-microcode (Ubuntu Focal) Status: Confirmed => Fix Released ** Changed in: intel-microcode (Ubuntu Bionic) Status: Confirmed => Fix Released -- 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: intel-ucode/06-4e-03 from release 20200609 hangs system in early boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1882890/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs