This bug was fixed in the package intel-microcode - 3.20191115.1ubuntu0.16.04.2
--------------- intel-microcode (3.20191115.1ubuntu0.16.04.2) xenial-security; urgency=medium
* REGRESSION UPDATE: warm reboots cause hangs on certain Skylake processors (LP: #1854764) + Reverted microcode (from revision 0x2000065): sig 0x00050654, pf_mask 0xb7, 2019-07-31, rev 0x2000064, size 33792
-- Steve Beattie <email address hidden> Mon, 02 Dec 2019 12:53:04 -0800
This bug was fixed in the package intel-microcode - 3.20191115. 1ubuntu0. 16.04.2
--------------- 1ubuntu0. 16.04.2) xenial-security; urgency=medium
intel-microcode (3.20191115.
* REGRESSION UPDATE: warm reboots cause hangs on certain Skylake
processors (LP: #1854764)
+ Reverted microcode (from revision 0x2000065):
sig 0x00050654, pf_mask 0xb7, 2019-07-31, rev 0x2000064, size 33792
-- Steve Beattie <email address hidden> Mon, 02 Dec 2019 12:53:04 -0800