[GRLUG] random loss of local keyboard

[Roger Roelofs]

I would lay odds that it's chromium. Browsers are going to ridiculous
lengths to tap into the gpu.

Sent from my iPhone

On Jul 5, 2012, at 17:10, John-Thomas Richards <jtr at jrichards.org> wrote:

> On Thu, Jul 05, 2012 at 04:34:05PM -0400, Michael Mol wrote:
>> 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
> [snip]
>>> Jul  5 15:59:52 auerbach mcelog: Processor 5 below trip temperature. Throttling disabled
> [snip]
>>> (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. :)
>
> It's currently on "ondemand"; I almost never see it running at full
> speed (2.2GHz) but most often at either 800MHz or 1.3GHz.  Now to find
> out how to change from ondemand to conservative...
>
>> Similarly, find out if your GPU has power settings you can tweak downward.
>
> That's running at Adaptive mode.  Curiously, I'm not running any video
> or graphically demandings apps (an xterm, Chromium, and the nVidia app)
> and it keeps jumped up to the highest performance level.  Not sure
> why.
> --
> john-thomas
> ------
> Think like a wise man but communicate in the language of the people.
> William Butler Yeats, poet, dramatist, essayist, Nobel laureate (1865-1939)
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