I spent some more time testing this today. It seems like it only happens
when I close the lid while *running on battery*. If I close the lid with
the laptop plugged in, THEN unplug it, I don't see these temperature
messages happen during idling / light use. Also notable is that unhandled
HKEY event 0x6032 doesn't show up if I close the lid on A/C power. This
issue still happens if I blacklist the thinkpad-acpi module, but I'm
wondering if it's something Lenovo specific that isn't being handled and
triggers the issue.
Some additional info about the machine:
*Kernel*
Thinkpad-acpi module enabled
Version 4.11.0-041100rc7-generic
Linux-firmware 1.161.1
*BIOS settings*
Speedstep on
AC – max performance
Battery – Battery Optimization
Thermal
AC – max performance
Battery – Balanced
CPU power mgmt enabled
I also tested to see how the CPU behaved under load and found something
else interesting. If I close the lid with the laptop unplugged (the
condition that causes this issue), the processor runs at a much lower clock
speed (~2.0 GHz) and much lower temperature (60C) when under load. This
makes me think something about the lid being closed on battery power causes
an issue with Intel Speedstep / p states / c states. I don't really know
much about how that works though, unfortunately.
converting video with lid closed plugged in will hover at 96-98C / 3.48 GHz
<-- 3.5GHz is the maximum turbo boost for this processor
converting video with lid open unplugged will hover around 80C / 2.9GHz <--
Probably the correct speed/temperature for these settings on battery power?
converting video with lid open plugged in will hover at 96-98C / 3.48 GHz
plug in, close lid, then unplug = 80C / 2.9GHz <-- the only way I can close
the lid without the issue happening. Doesn't seem like a coincidence.
unplug then close lid = 60C / 2.0GHz
unplug, close lid then plug back in = 60C / 2.0GHz
unplug, close lid, plug back in, unplug = 60C / 2.0GHz
On Fri, Apr 21, 2017 at 11:27 PM, neil k <host.cr...@gmail.com> wrote:
> Hello,
>
> I recently bought a new Thinkpad X270 (i7 7500U) and put Mint 18 on it. I
> have been running it with an external monitor with the lid closed, and I
> noticed I had a ton of scary temperature related messages in dmesg. They
> happen immediately after I close the lid, and about every 5 minutes if I
> leave it closed. The weird thing is that it idles around 45-55C which is
> perfectly normal for a laptop. I haven't seen a single temperature spike
> when this happens. I can also max out the processor encoding video and it
> will hover around 80C with no temperature warnings at all.
>
> Below is chunk of dmesg lines right after I close the lid (notice it says
> the CPU is over the threshold and .01 seconds later it's allegedly under
> the threshold again.) I'm running the 4.8 kernel right now. It seems to do
> the same thing with the mainline kernel (4.11) except the "mce" events
> don't happen anymore. I'm also running BIOS 1.11 if that matters. I
> upgraded from the default BIOS in hopes that it would fix this, but it
> doesn't seem to have done anything.
>
> Does anyone have any ideas about what could be causing this? It seems
> like something about the lid being closed causes it not to be able to read
> the temperature sensors properly, unless the CPU temperature really spikes
> enough to be throttled and cools back down to idle temperatures in less
> than .01 seconds.
>
>
> [ 4325.800141] thinkpad_acpi: unknown possible thermal alarm or keyboard
> event received
> [ 4325.800146] thinkpad_acpi: unhandled HKEY event 0x6032
> [ 4325.800149] thinkpad_acpi: please report the conditions when this event
> happened to ibm-acpi-devel@lists.sourceforge.net
> [ 4325.949784] CPU0: Core temperature above threshold, cpu clock throttled
> (total events = 1)
> [ 4325.949785] CPU2: Core temperature above threshold, cpu clock throttled
> (total events = 1)
> [ 4325.949786] CPU1: Package temperature above threshold, cpu clock
> throttled (total events = 1)
> [ 4325.949787] CPU3: Package temperature above threshold, cpu clock
> throttled (total events = 1)
> [ 4325.949789] CPU2: Package temperature above threshold, cpu clock
> throttled (total events = 1)
> [ 4325.949792] CPU0: Package temperature above threshold, cpu clock
> throttled (total events = 1)
> [ 4325.949793] mce: [Hardware Error]: Machine check events logged
> [ 4325.949794] mce: [Hardware Error]: Machine check events logged
> [ 4325.954773] CPU2: Core temperature/speed normal
> [ 4325.954773] CPU0: Core temperature/speed normal
> [ 4325.954774] CPU1: Package temperature/speed normal
> [ 4325.954774] CPU3: Package temperature/speed normal
> [ 4325.954775] CPU0: Package temperature/speed normal
> [ 4325.954776] CPU2: Package temperature/speed normal
>
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