[GRLUG] random loss of local keyboard

[John-Thomas Richards]

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:
> >> >> I've been getting random loss of functionality in my laptop keyboard.
> >> >> While typing it just stops responding.  A USB keyboard works fine.  The
> >> >> touchpad continues to work.  I've been running `tail -f
> >> >> /var/log/messages' in a term to see if I can see something.  This time
> >> >> nothing was registered.  About an hour before I got this:
> >> >>
> >> >> Jul  5 14:19:38 auerbach kernel: [18269.884919] colord[16472]: segfault at 8 ip 000000000040bc6d sp 00007fff111751c0 error 4 in colord[400000+20000]
> >> >> Jul  5 14:19:45 auerbach pulseaudio[16637]: [pulseaudio] pid.c: Stale PID file, overwriting.
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213563] CPU7: Core temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213565] CPU3: Core temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213566] CPU3: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213567] CPU7: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213604] CPU0: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213607] CPU4: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213610] CPU5: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213612] CPU1: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213615] CPU2: Package temperature/speed normal
> >> >> Jul  5 14:30:18 auerbach kernel: [18909.213618] CPU6: Package temperature/speed normal
> >> >> Jul  5 14:32:19 auerbach kernel: [19029.452136] [Hardware Error]: Machine check events logged
> >> >>
> >> >> The keyboard failure happened long after this.  Any help would be
> >> >> appreciated.  I did track down a similar error to the colord but that
> >> >> involved a loss of a USB keyboard while the local keyboard still worked.
> >> >> Close, but not quite.
> >> >
> >> > The keyboard will work in a VT and restarting X restores functionality
> >> > for a time.
> >>
> >> ...
> >>
> >> >> 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.)
-- 
john-thomas
------
I'm not altogether sure what world war three will be fought with, but no
matter what it is, world war four will be fought with sticks and rocks.
Albert Einstein