Comment 4 for bug 1855784

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Harry G McGavran Jr (w5pny) wrote : Re: [Bug 1855784] Re: Intel Microcode 3.20191115.1ubuntu0.16.04.2 still hangs on warm reboot with Intel(R) Xeon(R) W-2125 CPUi

On 12/17/19 12:13 PM, Harry G McGavran Jr wrote:
>
>
> On 12/17/19 11:52 AM, Seth Arnold wrote:
>> Hello Harry,
>>
>> Just to double-check, did you perform a *cold* reboot at least once
>> after installing the 3.20191115.1ubuntu0.16.04.2?

Meant to respond to this in my first reply...

The answer to this one is yes.

The only way I could get the system to come up was with a cold boot as
well. This was true for each of the last two microcode releases
in my update stream.

    Harry

>>
>> Can you please provide the output of:
>>
>> iucode-tool -S
>
> iucode-tool: system has processor(s) with signature 0x00050654
>
>>
>> It might also be helpful to know where exactly the failure started;
>> previous releases can be found on
>> https://launchpad.net/ubuntu/xenial/+source/intel-microcode
>>
>> (I'm guessing it's probably fastest to just work backwards up the list
>> rather than bisecting, but that's a guess.)
>
> I believe it was a problem with the last two microcode releases for
> Ubuntu 16.04 LTS.
>
> That would be the 3.20191115 and 3.20191112 releases.
> The 3.20190618 releases and before were ok.
>
> Exactly which ones on 3.20191115 and 3.20191112, I don't
> know without trying them, but the ones in the update stream
> for Ubuntu 16.04 LTS are the ones where I had trouble.
>
> Harry
>
>>
>> Here's the previous bug report for a handy link for navigating among the bugs:
>> https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1854764
>>
>> Thanks
>>