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I'm experiencing sudden shutdowns on my Linux systems.

  • Using Ubuntu 12.04, my kernel version is 3.5.0-37-generic #58~precise1-Ubuntu.
  • Running a Acer M5 581t(G) with 6 gigs ram laptop. I have been experiencing this for more then two weeks.

Its shuts off all a sudden with no warning. The temperatures are listed below at shut off. I have Windows 8 on the same machine and no problems running Windows, no shut off. Only once, and I had to update the BIOS firmware.

$sensors
    Physical id 0:  +51.0°C
    Core 0:         +52.0°C
    Core 1:         +45.0°C

My current /proc/interrupts shows my Thermal event interrupts as follows:

TRM:        1277       1278       1276       1276   Thermal event interrupt

There is no indication in syslog that a request to shutdown has been issued.

What could be the cause of this behavior?

I've attached links below to my dmesg log, /proc/interrupts, system log, and kernlog. I had two unexplained shut downs at roughly 12:24 and 12:26. both back to back. The first one occured right after I opened the lid after it being closed. The other was during boot-up to recover from the first crash.

Included logs

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you don't see any cron job schedule for this shutdown? –  Salton Aug 13 '13 at 18:26
    
You should be able to find a reason under /var/log/kern.log or /var/log/syslog.log or mcelog –  Salton Aug 13 '13 at 18:33
    
@Salton, thanks for the input. I added to of the logs to my question. And two more to this comment. Here are the other two logs: [dmesg log:] (docs.google.com/file/d/0B2qsVwyt_xNVX0pmb0s4MEJET0U/…; [/procs/interrupts/:] (docs.google.com/file/d/0B2qsVwyt_xNVdHVpOEtCS2wyVDg/…) –  david_p Aug 13 '13 at 20:05
    
I noticed Aug 13 12:25:46 david cron[1841]: (CRON) INFO (Running @reboot jobs) –  Salton Aug 13 '13 at 20:42
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