Public bug reported: 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) ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug focal third-party-packages ** Attachment added: "Graph showing cpu speed during code compile test." https://bugs.launchpad.net/bugs/1958031/+attachment/5554580/+files/linux_code_compile.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1958031 Title: CPU throttles to 400MHz under any workload - Dell Latitude 5420 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1958031/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
