Comment 67 for bug 1700373

Here is a successful test of a Core i5-6600 Skylake CPU under Xenial.

$ uname -a
Linux 4.10.0-28-generic #32~16.04.2-Ubuntu SMP Thu Jul 20 10:19:48 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ cat /proc/cpuinfo
(...)
vendor_id : GenuineIntel
cpu family : 6
model : 94
model name : Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz
stepping : 3
microcode : 0xa6
(...)

Before installing the intel-microcode package I had:

kernel: microcode: sig=0x506e3, pf=0x2, revision=0xa6
kernel: microcode: Microcode Update Driver: v2.2.

After installing the 3.20151106.1 package version:

kernel: microcode: sig=0x506e3, pf=0x2, revision=0xa6
kernel: microcode: Microcode Update Driver: v2.2.

(No surprise, since the microcode release was older than the CPU.)

After installing the 3.20170707.1~ubuntu16.04.0 package version:

kernel: microcode: microcode updated early to revision 0xba, date = 2017-04-09
kernel: microcode: sig=0x506e3, pf=0x2, revision=0xba
kernel: microcode: Microcode Update Driver: v2.2.

So, the update worked fine, and the machine booted and seems to run fine. :)

I'll pay attention in the next few days if the machine exhibits any weird behavior. It is extremely stable, so any new problem should stick out clearly.