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I receive following error messages a couple of times per hour:

08.03.18 21:27  kernel  CPU0: Core temperature above threshold, cpu clock throttled (total events = 2234)

08.03.18 21:27  kernel  CPU2: Core temperature above threshold, cpu clock throttled (total events = 2234)

08.03.18 21:27  kernel  CPU1: Package temperature above threshold, cpu clock throttled (total events = 2695)

08.03.18 21:27  kernel  CPU3: Package temperature above threshold, cpu clock throttled (total events = 2695)

08.03.18 21:27  kernel  CPU2: Package temperature above threshold, cpu clock throttled (total events = 2695)

08.03.18 21:27  kernel  CPU0: Package temperature above threshold, cpu clock throttled (total events = 2695)

08.03.18 21:27  kernel  CPU2: Core temperature/speed normal

08.03.18 21:27  kernel  CPU0: Core temperature/speed normal

08.03.18 21:27  kernel  CPU3: Package temperature/speed normal

08.03.18 21:27  kernel  CPU1: Package temperature/speed normal

08.03.18 21:27  kernel  CPU0: Package temperature/speed normal

08.03.18 21:27  kernel  CPU2: Package temperature/speed normal

Hardware spec:

ThinkPad X1 Yoga 2nd

N1NET33W (1.20 )

Intel(R) Core(TM) i7-7600U CPU @ 2.80GHz

Production date 2017.11

Software:

Distributor ID: Ubuntu

Description:    Ubuntu 17.10

Release:        17.10

Codename:       artful

Linux 4.13.0-36-generic #40-Ubuntu SMP Fri Feb 16 20:07:48 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Bios:

I set both battery and AC to performance in my BIOS settings, the BIOS is up to date.

What is the problem

The problem is that a threshold of CPU temperature is hit quite too early, it happens around 75°C, even though the CPU is allowed to reach up to 100°C. The temperature never goes higher than 85°C. So the CPU power gets throttled so fast.

I don't know if I may have a manufacturer hardware issue regarding inadequate thermal paste, or if it is software related. Before I send it to Lenovo I want to be sure it's not a self-made problem.

Stats

When I run a stress test

stress -c 4 -t 300

the error message happens almost instantly.

i7z gives following output:

Cpu speed from cpuinfo 2903.00Mhz

cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc

Linux's inbuilt cpu_khz code emulated now

True Frequency (without accounting Turbo) 2903 MHz

  CPU Multiplier 29x || Bus clock frequency (BCLK) 100.10 MHz



Socket [0] - [physical cores=2, logical cores=4, max online cores ever=2]

  TURBO ENABLED on 2 Cores, Hyper Threading ON

  Max Frequency without considering Turbo 3003.10 MHz (100.10 x [30])

  Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is  39x/39x/39x/39x

  Real Current Frequency 3187.97 MHz [100.10 x 31.85] (Max of below)

        Core [core-id]  :Actual Freq (Mult.)      C0%   Halt(C1)%  C3 %   C6 %  Temp      VCore

        Core 1 [0]:       3187.97 (31.85x)      99.9       0       0       0    85      1.0037

        Core 2 [1]:       3187.97 (31.85x)      99.9       0       0       0    84      1.0037           





C0 = Processor running without halting

C1 = Processor running with halts (States >C0 are power saver modes with cores idling)

C3 = Cores running with PLL turned off and core cache turned off

C6, C7 = Everything in C3 + core state saved to last level cache, C7 is deeper than C6

  Above values in table are in percentage over the last 1 sec

[core-id] refers to core-id number in /proc/cpuinfo

'Garbage Values' message printed when garbage values are read

  Ctrl+C to exit

As said, it never exceeds the 85 Temp, yet the CPU gets throttled.

sensors shows following output

iwlwifi-virtual-0

Adapter: Virtual device

temp1:        +30.0°C  



pch_skylake-virtual-0

Adapter: Virtual device

temp1:        +52.0°C  



acpitz-virtual-0

Adapter: Virtual device

temp1:        +56.0°C  (crit = +98.0°C)



thinkpad-isa-0000

Adapter: ISA adapter

fan1:        5859 RPM



coretemp-isa-0000

Adapter: ISA adapter

Package id 0:  +59.0°C  (high = +100.0°C, crit = +100.0°C)

Core 0:        +59.0°C  (high = +100.0°C, crit = +100.0°C)

Core 1:        +58.0°C  (high = +100.0°C, crit = +100.0°C)

But the high-setting probably has no effect.

thermald

So I've played around with thermald then.

This is my adjusted configuration that I've found here:

<?xml version="1.0" encoding="UTF-8"?>

<ThermalConfiguration>

   <Platform>

      <Name>Use Fan control first then CPU throttle</Name>

      <ProductName>*</ProductName>

      <Preference>QUIET</Preference>

      <ThermalZones>

         <ThermalZone>

            <Type>x86_pkg_temp</Type>

            <TripPoints>

               <TripPoint>

                  <SensorType>x86_pkg_temp</SensorType>

                  <Temperature>90000</Temperature>

                  <type>passive</type>

                  <ControlType>SEQUENTIAL</ControlType>

                  <CoolingDevice>

                     <type>_fan_</type>

                  </CoolingDevice>

               </TripPoint>

            </TripPoints>

         </ThermalZone>

      </ThermalZones>

      <CoolingDevices>

         <CoolingDevice>

            <Type>_fan_</Type>

            <Path>/sys/bus/platform/devices/thinkpad_hwmon/pwm1</Path>

            <MinState>100</MinState>

            <MaxState>255</MaxState>

            <IncDecStep>50</IncDecStep>

            <DebouncePeriod>10</DebouncePeriod>

         </CoolingDevice>

      </CoolingDevices>

   </Platform>

</ThermalConfiguration>

This makes no real difference, but I can see threshold settings at least (the last lines):

╰─ sudo thermald --no-daemon --loglevel=info



NO RAPL sysfs present 

22 CPUID levels; family:model:stepping 0x6:8e:9 (6:142:9)

Running on a vanilla kernel

Polling mode is enabled: 4

sensor_update: type x86_pkg_temp

sensor_update: type pch_skylake

sensor_update: type iwlwifi

sensor_update: type acpitz

thd_read_default_thermal_sensors loaded 4 sensors 

dts /sys/devices/platform/coretemp.0/name doesn't exist

dts /sys/class/hwmon/hwmon3/name doesn't exist

failed to open /dev/acpi_thermal_rel 

failed to open /dev/acpi_thermal_rel 

TRT/ART read failed

 Dumping parsed XML Data

 *** Index 0 ***

Name: UseFancontrolfirstthenCPUthrottle

UUID: 

type: 0

        Zone 0 

         Name: x86_pkg_temp

                 Trip Point 0 

                  temp 90000 

                  trip type 2 

                  hyst id 0 

                  sensor type x86_pkg_temp 

                  cdev index 0 

                          type _fan_ 

                          influence 0 

                          SamplingPeriod 0 

        Cooling Dev 0 

                Type: _fan_

                Path: /sys/bus/platform/devices/thinkpad_hwmon/pwm1

                Min: 100

                Max: 255

                Step: 50

                AutoDownControl: 0

Product Name matched [wildcard]

sensor index:3 x86_pkg_temp /sys/class/thermal/thermal_zone3/ Async:1 

sensor index:1 pch_skylake /sys/class/thermal/thermal_zone1/ Async:0 

sensor index:2 iwlwifi /sys/class/thermal/thermal_zone2/ Async:0 

sensor index:0 acpitz /sys/class/thermal/thermal_zone0/ Async:0 

sensor index:4 hwmon /sys/class/hwmon/hwmon1/temp1_input Async:0 

sensor index:5 hwmon /sys/class/hwmon/hwmon1/temp2_input Async:0 

sensor index:6 hwmon /sys/class/hwmon/hwmon1/temp3_input Async:0 

thd_read_default_cooling devices loaded 4 cdevs 

powercap RAPL no long term time window

Use Default pstate drv settings

Product Name matched [wildcard]

3: Processor, C:0 MN: 0 MX:10 ST:1 pt:/sys/class/thermal/ rd_bk 0 

1: Processor, C:0 MN: 0 MX:10 ST:1 pt:/sys/class/thermal/ rd_bk 0 

2: Processor, C:0 MN: 0 MX:10 ST:1 pt:/sys/class/thermal/ rd_bk 0 

0: Processor, C:0 MN: 0 MX:10 ST:1 pt:/sys/class/thermal/ rd_bk 0 

4: intel_pstate, C:0 MN: 0 MX:10 ST:1 pt:/sys/devices/system/cpu/intel_pstate/ rd_bk 1 

5: _fan_, C:255 MN: 100 MX:255 ST:50 pt:/sys/bus/platform/devices/thinkpad_hwmon/pwm1 rd_bk 1 

6: LCD, C:0 MN: 0 MX:1060 ST:106 pt:/sys/class/backlight/intel_backlight/ rd_bk 1 

Sorted trip dump zone index:1 type:pch_skylake:

index 0: type:critical temp:115000 hyst:1 zone id:1 sensor id:1 cdev size:0

trip type: 0 temp: 115000 

Sorted trip dump zone index:0 type:acpitz:

index 0: type:critical temp:98000 hyst:1 zone id:0 sensor id:0 cdev size:0

trip type: 0 temp: 98000 

thd_read_default_thermal_zones loaded 2 zones 

zone cpu will be created 

dts zone /sys/devices/platform/coretemp.0/name doesn't exist

/sys/class/hwmon/hwmon4/name->iwlwifi

/sys/class/hwmon/hwmon2/name->pch_skylake

/sys/class/hwmon/hwmon0/name->acpitz

dts zone /sys/class/hwmon/hwmon3/name doesn't exist

/sys/class/hwmon/hwmon1/name->coretemp

Buggy max temp: to close to critical 90000

Core temp DTS :critical 100000, max 90000, psv 95000

node type: Element, name: CoolingDevice value: rapl_controller

node type: Element, name: CoolingDevice value: intel_pstate

node type: Element, name: CoolingDevice value: intel_powerclamp

node type: Element, name: CoolingDevice value: cpufreq

node type: Element, name: CoolingDevice value: Processor

CDEVS order specified in thermal-cpu-cdev-order.xml

Sorted trip dump zone index:4 type:cpu:

index 0: type:passive temp:95000 hyst:0 zone id:4 sensor id:65535 cdev size:2

cdev[0] intel_pstate

cdev[1] Processor

trip type: 2 temp: 95000 

Product Name matched [wildcard]

zone x86_pkg_temp bounded 

Sorted trip dump zone index:5 type:x86_pkg_temp:

index 0: type:passive temp:90000 hyst:0 zone id:5 sensor id:3 cdev size:1

cdev[0] _fan_

trip type: 2 temp: 90000 

Zone 1: pch_skylake, Active:0 Bind:0 Sensor_cnt:1

..sensors.. 

sensor index:1 pch_skylake /sys/class/thermal/thermal_zone1/ Async:0 

..trips.. 

index 0: type:critical temp:115000 hyst:1 zone id:1 sensor id:1 cdev size:0

Zone 0: acpitz, Active:0 Bind:0 Sensor_cnt:1

..sensors.. 

sensor index:0 acpitz /sys/class/thermal/thermal_zone0/ Async:0 

..trips.. 

index 0: type:critical temp:98000 hyst:1 zone id:0 sensor id:0 cdev size:0

Zone 4: cpu, Active:1 Bind:0 Sensor_cnt:1

..sensors.. 

sensor index:3 x86_pkg_temp /sys/class/thermal/thermal_zone3/ Async:1 

..trips.. 

index 0: type:passive temp:95000 hyst:0 zone id:4 sensor id:65535 cdev size:2

cdev[0] intel_pstate

cdev[1] Processor

index 1: type:polling temp:90000 hyst:0 zone id:4 sensor id:3 cdev size:0

Zone 5: x86_pkg_temp, Active:1 Bind:1 Sensor_cnt:1

..sensors.. 

sensor index:3 x86_pkg_temp /sys/class/thermal/thermal_zone3/ Async:1 

..trips.. 

index 0: type:passive temp:90000 hyst:0 zone id:5 sensor id:3 cdev size:1

cdev[0] _fan_

index 1: type:polling temp:85000 hyst:0 zone id:5 sensor id:3 cdev size:0

FD = 7

Current user preference is 0

thd_engine_thread begin

Set : threshold:90000, temperature:53000, cdev:5(_fan_), curr_state:205, max_state:255

Set : threshold:90000, temperature:57000, cdev:5(_fan_), curr_state:155, max_state:255

Set : threshold:90000, temperature:85000, cdev:5(_fan_), curr_state:105, max_state:255

Set : threshold:90000, temperature:85000, cdev:5(_fan_), curr_state:100, max_state:255

Final thoughts/questions

• Is it possible to set the CPU temperature threshold?


• Is it meant to be set at all or is this BIOS/hardware related?


• May my hardware (thermal paste) be defect?


• Or did I maybe analysed something completely wrong?

Update #1

After diving deeper into this topic and reading several articles regarding Intel's CPU throttling and other posts facing same (or just slight different) issues on other operating systems and kernels, I came to the conclusion that my laptop may be not misbehaving as I thought it would.

Though the kernel-messages are still bizarre, but the reason could be a wrong kernel printk level or whatsoever. I also retrieve those messages when my CPU package temperature is around +52.0°C and CPU frequency just 1200MHz.
This just does not make any sense at all.

When testing my laptop with stress-tests I can see the error messages, but in fact the CPUs don't get throttled.
If I test 1 core only, I get full turbo boost speed of 3,900MHz.
Testing all 4 cores reduces the maximum frequency to ~3,300MHz.
Which is the expected behavior.

So I'll just put this issue aside - unless someone here may provide more insides.

Update #2

No changes after updating the system:

No LSB modules are available.

Distributor ID: Ubuntu

Description:    Ubuntu 18.04 LTS

Release:        18.04

Codename:       bionic

Linux4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Update #3

No changes after updating the system:

Distributor ID: Ubuntu

Description:    Ubuntu 18.10

Release:        18.10

Codename:       cosmic

Linux x1 4.18.0-13-generic #14-Ubuntu SMP Wed Dec 5 09:04:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

So my final assumption is that the logs are highly likely bogus or that the log-level is mis-configured. Because my laptop just works fine, nor does it get throttled, neither is it overheating.

Still, if anyone has a hunch how this could be fixed, feel free to answer :-)