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awes

Member

Registered: 2015-03-13

Posts: 20

[SOLVED] Sudden temperature jump causes shutdown

Hello,
Since maybe (don't remember exactly) two weeks I have a problem with automatic random shutdown, caused by (I presume) temperature reading.
I have a Acer V17 (VN7-791G), with NVidia graphics, but I don't use it (only the integrated one).

I have collected lmsensors' logs (below). You will see that "temp3" jumps from 30°C to 117°C in a second. I don't know what is the "temp3" measurement of inside my laptop and I don't know how to find out.

Please take a look at logs:

10:08:15
acpitz-virtual-0
temp1:        +27.8°C  (crit = +105.0°C)
temp2:        +29.8°C  (crit = +105.0°C)
temp3:        +30.0°C  (crit = +100.0°C)
temp4:        +55.0°C  (crit = +92.0°C)

coretemp-isa-0000
Physical id 0:  +70.0°C  (high = +84.0°C, crit = +100.0°C)
Core 0:         +66.0°C  (high = +84.0°C, crit = +100.0°C)
Core 1:         +67.0°C  (high = +84.0°C, crit = +100.0°C)
Core 2:         +65.0°C  (high = +84.0°C, crit = +100.0°C)
Core 3:         +64.0°C  (high = +84.0°C, crit = +100.0°C)

10:08:16
acpitz-virtual-0
temp1:        +27.8°C  (crit = +105.0°C)
temp2:        +29.8°C  (crit = +105.0°C)
temp3:       +117.0°C  (crit = +100.0°C)
temp4:        +55.0°C  (crit = +92.0°C)

coretemp-isa-0000
Physical id 0:  +69.0°C  (high = +84.0°C, crit = +100.0°C)
Core 0:         +65.0°C  (high = +84.0°C, crit = +100.0°C)
Core 1:         +66.0°C  (high = +84.0°C, crit = +100.0°C)
Core 2:         +65.0°C  (high = +84.0°C, crit = +100.0°C)
Core 3:         +64.0°C  (high = +84.0°C, crit = +100.0°C)

10:08:17
acpitz-virtual-0
temp1:        +27.8°C  (crit = +105.0°C)
temp2:        +29.8°C  (crit = +105.0°C)
temp3:       +101.0°C  (crit = +100.0°C)
temp4:        +55.0°C  (crit = +92.0°C)

coretemp-isa-0000
Physical id 0:  +69.0°C  (high = +84.0°C, crit = +100.0°C)
Core 0:         +66.0°C  (high = +84.0°C, crit = +100.0°C)
Core 1:         +67.0°C  (high = +84.0°C, crit = +100.0°C)
Core 2:         +65.0°C  (high = +84.0°C, crit = +100.0°C)
Core 3:         +64.0°C  (high = +84.0°C, crit = +100.0°C)

10:08:18
acpitz-virtual-0
temp1:        +27.8°C  (crit = +105.0°C)
temp2:        +29.8°C  (crit = +105.0°C)
temp3:       +105.0°C  (crit = +100.0°C)
temp4:        +55.0°C  (crit = +92.0°C)

coretemp-isa-0000
Physical id 0:  +69.0°C  (high = +84.0°C, crit = +100.0°C)
Core 0:         +65.0°C  (high = +84.0°C, crit = +100.0°C)
Core 1:         +66.0°C  (high = +84.0°C, crit = +100.0°C)
Core 2:         +65.0°C  (high = +84.0°C, crit = +100.0°C)
Core 3:         +63.0°C  (high = +84.0°C, crit = +100.0°C)

... shutdown

Looking at the whole log of "temp3" (which is here, measured every 1s), there are many values > 100°C, but it looks like that there need to be a few bad valued in a row to cause a shutdown.

Here's also a plot of "temp3" sensor (measured every 1s)
http://i62.tinypic.com/i2sll4.png

Please help!
Thanks.

-- mod edit: read the Forum Etiquette and only post thumbnails http://wiki.archlinux.org/index.php/For … s_and_Code [jwr] --

Last edited by awes (2015-06-19 08:14:34)

awes

Member

Registered: 2015-03-13

Posts: 20

Re: [SOLVED] Sudden temperature jump causes shutdown

I've identified the problem. It's a kernel upgrade 4.0.4-1 -> 4.0.4-2.
There are new config options enabled in 4.0.4-2:
+CONFIG_THERMAL_HWMON=y
+CONFIG_HWMON=y

Using kernel 4.0.4-1, lmsensors show only CPU temperature, using 4.0.4-2, there's new section "acpitz-virtual-0, Adapter: Virtual device", which includes "temp3" that shuts down my machine.
I presume that's a kernel bug and I've reported it to the kernel bug tracker.

edit:
before I mark it "solved": which process is responsible for shutting computer down when temperature is to high? I'd like to disable that feature...

Last edited by awes (2015-06-03 13:13:57)

shulamy

Member

From: israel

Registered: 2010-09-11

Posts: 454

Re: [SOLVED] Sudden temperature jump causes shutdown

be careful with this, you can burn your computer.

ezik

awes

Member

Registered: 2015-03-13

Posts: 20

Re: [SOLVED] Sudden temperature jump causes shutdown

That shouldn't happen, CPU temps are fine and throttling is also working ok. I just want to disable automatic shutdown, at least to the moment that issue is fixed.

awes

Member

Registered: 2015-03-13

Posts: 20

Re: [SOLVED] Sudden temperature jump causes shutdown

Turned out that Kernel downgrade didn't fix anything, shutdowns still occured.
Downgrade did only one thing: prevented lmsensors from seeing acpitz-virtual-0, but it didn't prevent kernel from using it.

I did solve it the proper way. Found in journal:

kernel: thermal thermal_zone2: critical temperature reached(113 C),shutting down

Which led me to: /sys/class/thermal/thermal_zone2/
(this is what lmsensors shows as "temp3", through /sys/class/hwmon/hwmon0/temp3_input)

SYSFS docs provided solution:

mode
    One of the predefined values in [enabled, disabled].
    This file gives information about the algorithm that is currently     managing the thermal zone. It can be either default kernel based algorithm or user space application.
    enabled        = enable Kernel Thermal management.
    disabled    = Preventing kernel thermal zone driver actions upon
              trip points so that user application can take full
              charge of the thermal management.

The way to disable Kernel Thermal management for zone/sensor:

echo "disabled" > /sys/class/thermal/thermal_zone2/mode

Last edited by awes (2015-06-19 08:15:58)