Comment 22 for bug 1746200

Today, I retried "intel-microcode" on Xubuntu 18.04 fresh install and I was able to reboot 6 times in a row without any freeze.

~$ dmesg | grep microcode
[ 0.000000] microcode: microcode updated early to revision 0xc2, date = 2017-11-16
[ 0.987572] microcode: sig=0x506e3, pf=0x20, revision=0xc2
[ 0.987975] microcode: Microcode Update Driver: v2.2.

Linux kernel version 4.15.0-20

So, it looks that the bug has been repaired by that linux v4.15 branch.