[GRLUG] random loss of local keyboard

[Michael Mol]

On Thu, Jul 5, 2012 at 4:25 PM, John-Thomas Richards <jtr at jrichards.org> wrote:
> On Thu, Jul 05, 2012 at 04:05:32PM -0400, Michael Mol wrote:
>> On Thu, Jul 5, 2012 at 4:03 PM, John-Thomas Richards <jtr at jrichards.org> wrote:
>> > On Thu, Jul 05, 2012 at 03:53:06PM -0400, Michael Mol wrote:
>> >> On Thu, Jul 5, 2012 at 3:45 PM, John-Thomas Richards <jtr at jrichards.org> wrote:
>> >> > On Thu, Jul 05, 2012 at 03:37:35PM -0400, John-Thomas Richards wrote:

[snip]

>> >> >> Jul  5 14:32:19 auerbach kernel: [19029.452136] [Hardware Error]: Machine check events logged
>> >>
>> >> This is the line you should really care about. You have failing
>> >> hardware somewhere, and the kernel logged it.
>> >>
>> >> I think this page would set you in the right direction to identifying
>> >> what's going on:
>> >>
>> >> https://en.wikipedia.org/wiki/Machine_Check_Exception#Decoding_MCEs
>> >
>> > Thanks!  I'm checking it now.
>> >
>> >> ...but a random stab. The weather's been crazy hot lately. Is that
>> >> machine in a well-cooled room?
>> >
>> > It's in my office...so no.  It's not.  AC is running but I'm still
>> > sweating.
>>
>> Semi-related. Do you have power management configured? I.e. CPU
>> underclocked when not in use, GPU underclocked when not in use, that
>> kind of thing? If not, that would probably be a good idea for now.
>
> Yes; I just checked the logs again and saw this:
>
> Jul  5 15:59:52 auerbach mcelog: Processor 7 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 5 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 1 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 2 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 6 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 7 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 4 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 0 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 3 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 3 heated above trip temperature. Throttling enabled.
> Jul  5 15:59:52 auerbach mcelog: Please check your system cooling. Performance will be impacted
> Jul  5 15:59:52 auerbach mcelog: Processor 5 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 2 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 7 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 6 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 1 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 7 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 3 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 3 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 0 below trip temperature. Throttling disabled
> Jul  5 15:59:52 auerbach mcelog: Processor 4 below trip temperature. Throttling disabled
>
> (I just installed mcelog in response to your suggestion.)

Set your CPU governer to "conservative" or even "powersave" until the
heat wave passes. You've got eight cores, you'll be fine. :)

Similarly, find out if your GPU has power settings you can tweak downward.

-- 
:wq