CPU throttles to 400MHz under any workload - Dell Latitude 5420

[Joshua]

Hello, I see that the Dell Latitude 5420 is Ubuntu 20.04 Certified. But there seems to be a major issue that is known about the cpu throttling down to 400MHz under pretty much any heavy workload. I've contacted dell support about this issue and they have been less then helpful. I have multiple of these devices for myself and other employees, this is a major issue, I graphed the performance out under a sustained workload and found that this is a 35% performance hit on the device when preforming tasks such as code compiling. I'm looking for assistance in solving this issue.

https://github.com/intel/thermal_daemon/issues/293
https://www.dell.com/community/Latitude/Latitude-5420-7420-7520-CPU-Throttling-Issue-on-Linux/td-p/7959019

Description: Ubuntu 20.04.3 LTS
Release: 20.04

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.11.0-46-generic 5.11.0-46.51~20.04.1
ProcVersionSignature: Ubuntu 5.11.0-46.51~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Jan 15 12:38:58 2022
InstallationDate: Installed on 2021-06-14 (215 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-signed-hwe-5.11
UpgradeStatus: No upgrade log present (probably fresh install)