Thanks for reporting this issue, I have tried to reproduce it locally on a couple machines with the same CPUID but they boot fine with this microcode revision - from their dmesg:
microcode: microcode updated early to revision 0xe2, date = 2020-07-14
Linux version 5.4.0-54-generic (buildd@lcy01-amd64-024) (gcc version
9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #60-Ubuntu SMP Fri Nov 6 10:37:59
UTC 2020 (Ubuntu 5.4.0-54.60-generic 5.4.65)
...
microcode: sig=0x406e3, pf=0x80, revision=0xe2
microcode: Microcode Update Driver: v2.2.
(Although these have a different CPU than the one listed above - Intel(R) Core(TM) i7-6500U)
So I am not able to reproduce it myself which makes this hard to try and debug.
I do notice you mention the machine has BIOS update available - can you please try installing this first and see if that helps?
Thanks for reporting this issue, I have tried to reproduce it locally on a couple machines with the same CPUID but they boot fine with this microcode revision - from their dmesg:
microcode: microcode updated early to revision 0xe2, date = 2020-07-14 lcy01-amd64- 024) (gcc version ~20.04) ) #60-Ubuntu SMP Fri Nov 6 10:37:59
Linux version 5.4.0-54-generic (buildd@
9.3.0 (Ubuntu 9.3.0-17ubuntu1
UTC 2020 (Ubuntu 5.4.0-54.60-generic 5.4.65)
...
microcode: sig=0x406e3, pf=0x80, revision=0xe2
microcode: Microcode Update Driver: v2.2.
(Although these have a different CPU than the one listed above - Intel(R) Core(TM) i7-6500U)
So I am not able to reproduce it myself which makes this hard to try and debug.
I do notice you mention the machine has BIOS update available - can you please try installing this first and see if that helps?