I am affected as well on a Dell P74G Inspiron 7460 with an i7-7500U CPU
@ 2.70GHz and an integrated GPU + an Nvidia GPU using the NVidia
drivers.


According from information I found here

https://icecat.biz/p/dell/w56752561pth-gld/inspiron-
notebooks-7460-33552288.html

the TDPs of my CPU are:

Thermal Design Power (TDP)     15 W
Configurable TDP-up frequency 2.9 GHz
Configurable TDP-up            25 W
Configurable TDP-down         7.5 W


CPU version as read from /proc/cpuinfo:

vendor_id       : GenuineIntel
cpu family      : 6
model           : 142
model name      : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping        : 9
microcode       : 0xde


>From lspci, detail of the GPUs:

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
01:00.0 3D controller: NVIDIA Corporation GM108M [GeForce 940MX] (rev a2)


My Kernel:

uname -a
Linux [redacted] 5.4.0-66-generic #74-Ubuntu SMP Wed Jan 27 22:54:38 UTC 2021 
x86_64 x86_64 x86_64 GNU/Linux


Output of the commands recommended above:

dmidecode looks odd returning info about WiFi:

sudo dmidecode -H 11
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 2.8 present.
85 structures occupying 5497 bytes.
Table at 0x000E9CA0.

Handle 0x000B, DMI type 8, 9 bytes
Port Connector Information
        Internal Reference Designator: JNGFF1 - WLAN/BT/Wigig CONN
        Internal Connector Type: None
        External Reference Designator: Not Specified
        External Connector Type: None
        Port Type: Other


sudo modprobe msr
sudo rdmsr -f 29:24 -d 0x1a2
2


Reproducing the issue:

stress -c 8
stress: info: [48012] dispatching hogs: 8 cpu, 0 io, 0 vm, 0 hdd

Dmesg output:

[17674.962910] mce: CPU3: Core temperature above threshold, cpu clock throttled 
(total events = 3987)
[17674.962910] mce: CPU1: Core temperature above threshold, cpu clock throttled 
(total events = 3986)
[17674.962912] mce: CPU0: Package temperature above threshold, cpu clock 
throttled (total events = 7491)
[17674.962913] mce: CPU2: Package temperature above threshold, cpu clock 
throttled (total events = 7491)
[17674.962914] mce: CPU1: Package temperature above threshold, cpu clock 
throttled (total events = 7487)
[17674.962915] mce: CPU3: Package temperature above threshold, cpu clock 
throttled (total events = 7491)
[17674.966955] mce: CPU1: Core temperature/speed normal
[17674.966956] mce: CPU3: Core temperature/speed normal
[17674.966957] mce: CPU2: Package temperature/speed normal
[17674.966958] mce: CPU0: Package temperature/speed normal
[17674.966958] mce: CPU3: Package temperature/speed normal
[17674.966960] mce: CPU1: Package temperature/speed normal

Turbostat line being used (NOTE: 100 milliseconds interval):
turbostat --quiet --Summary --show 
Busy%,Bzy_MHz,PkgTmp,PkgWatt,CorWatt,GFXWatt,Time_Of_Day_Seconds --interval 0.1


Output of turbostat across the beginning of stress:

Time_Of_Day_Seconds     Busy%   Bzy_MHz PkgTmp  PkgWatt CorWatt GFXWatt
1622157712.441769       9.23    795     51      1.75    0.20    0.11
1622157712.542624       10.77   711     52      1.84    0.21    0.12
1622157712.643427       8.98    708     51      1.80    0.17    0.07
1622157712.744178       12.97   746     51      1.90    0.24    0.13
1622157712.850717       13.32   712     51      1.68    0.20    0.11 <--- START 
STRESS
1622157712.951114       95.99   2587    75      12.69   10.76   0.17
1622157713.051319       99.59   3500    82      19.36   17.56   0.14
1622157713.151571       99.65   3500    85      19.54   17.66   0.18
1622157713.252241       99.65   3500    88      19.76   17.82   0.14
1622157713.352490       99.59   3500    90      19.66   17.76   0.17
1622157713.452694       99.65   3500    90      19.22   17.54   0.08
1622157713.552947       99.59   3500    91      20.09   18.09   0.14


Output of turbostat across the throttle trigger event:
Time_Of_Day_Seconds     Busy%   Bzy_MHz PkgTmp  PkgWatt CorWatt GFXWatt
1622157718.567121       99.65   3500    95      19.97   17.94   0.16
1622157718.667327       99.68   3500    95      19.79   18.05   0.13
1622157718.767572       99.62   3500    95      19.76   17.94   0.13
1622157718.867776       99.65   3500    96      19.81   18.00   0.16
1622157718.968029       99.65   3500    95      20.01   17.98   0.17
1622157719.068238       99.65   3500    96      20.13   18.29   0.17
1622157719.169153       99.65   3500    97      20.35   18.44   0.21
1622157719.269796       99.65   3500    97      20.12   18.24   0.20 <--- 
THRESHOLD TRIGGERED
1622157719.370056       99.59   3355    90      18.04   15.99   0.18
1622157719.470352       99.53   3117    86      14.53   12.69   0.17
1622157719.572124       99.61   3117    86      14.33   12.56   0.09
1622157719.672498       99.61   3103    85      14.67   12.78   0.16
1622157719.772984       99.63   3118    85      14.46   12.71   0.13
1622157719.873219       99.62   3113    84      14.63   12.71   0.14
1622157719.973515       99.60   3125    85      14.54   12.74   0.13

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https://bugs.launchpad.net/bugs/1851749

Title:
  Frequently getting thermal warnings and cpu throttling messages in
  syslog

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