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optiluca
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Joined: 16 Jan 2006
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Location: Rivergaro, Italy

PostPosted: Mon Apr 01, 2013 4:17 pm    Post subject: Spontaneous hard shutdowns Reply with quote

Hi all. My laptop has recently started spontaneously shutting down (with no warning whatsoever), in what I can only assume is some kind of hardware issue. The pc will be happily idling, then it will immediately switch off, as if the power has been removed. The only weird messages I have found in /var/log/messages are as follows:

Code:
Apr  1 15:09:00 localhost smartd[10962]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 110 to 112
Apr  1 15:09:00 localhost smartd[10962]: Device: /dev/sdb [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 72 to 67
Apr  1 15:09:00 localhost smartd[10962]: Device: /dev/sdb [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 28 to 33


However http://sourceforge.net/apps/trac/smartmontools/wiki/FAQ#Whyismydisktemperaturesreportedbysmartdas150Celsius suggests that this is normal. Also, these messages do seem to occur independently of my shutdowns.

I have a feeling that this kind of behaviour has also occurred while running Windows, confirming the possibility of a hardware issue: it would just be nice to be able to pin it down in some way so that I can be sure that the machine gets fixed when I send it in for repair. Does anybody know of any other useful logs that might help me work out what's going on?
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# "Hmm, sounds like your system froze up."
# "I don't know why. It's about 80 degrees in here!"

http://www.rinkworks.com/stupid/cs_mincing.shtml
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ShadowCat8
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Joined: 07 Oct 2008
Posts: 129
Location: Arcadia, CA, USA

PostPosted: Mon Apr 01, 2013 7:29 pm    Post subject: Reply with quote

Greetings,

Have you tried installing, configuring and running "sys-apps/lm_sensors"?

Usually when I have seen that behavior in the past, it tends to link back to the processor overheating. Lm_sensors can tell you if that is the case.

HTH. Let us know.
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"One thing Gentoo Linux has taught me is; You can never know EVERYTHING. but you can keep learning!"
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optiluca
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Joined: 16 Jan 2006
Posts: 531
Location: Rivergaro, Italy

PostPosted: Mon Apr 01, 2013 7:38 pm    Post subject: Reply with quote

I don't think anything is overheating, my desktop features this plasmoid so I should have noticed :D http://i1311.photobucket.com/albums/s677/optiluca/Temps_zpsbf53786a.jpg. I'll keep a closer eye on it anyway.
_________________
# "Hmm, sounds like your system froze up."
# "I don't know why. It's about 80 degrees in here!"

http://www.rinkworks.com/stupid/cs_mincing.shtml
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NeddySeagoon
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Joined: 05 Jul 2003
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PostPosted: Mon Apr 01, 2013 8:26 pm    Post subject: Reply with quote

optiluca,

Code:
/dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 110 to 112

If your HDD is operating at 110 Deg C, it won't last long. The parts its made from are only rated for 80 deg C operation.
Your CPU is probably hotter than your HDD.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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optiluca
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Joined: 16 Jan 2006
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Location: Rivergaro, Italy

PostPosted: Mon Apr 01, 2013 8:30 pm    Post subject: Reply with quote

NeddySeagoon wrote:
optiluca,

Code:
/dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 110 to 112

If your HDD is operating at 110 Deg C, it won't last long. The parts its made from are only rated for 80 deg C operation.
Your CPU is probably hotter than your HDD.


The link from my OP explains that those values are not actually the temps in °C (despite the unhelpful names...) Indeed, if I check temps with smartctl I get a much more sensible 36°C...
_________________
# "Hmm, sounds like your system froze up."
# "I don't know why. It's about 80 degrees in here!"

http://www.rinkworks.com/stupid/cs_mincing.shtml
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NeddySeagoon
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Joined: 05 Jul 2003
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PostPosted: Mon Apr 01, 2013 9:25 pm    Post subject: Reply with quote

optiluca,

Long shot but I've seen it on a few laptops with dying batteries.

What happens is that the battery goes short circuit for an instant, then heals.
However, for that instant, the power to the laptop is lost and it powers off.
These power offs are random.

To test, operate the laptop from AC but remove the battery, if the power offs stop, you need a new battery.
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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