Just want to chime in here. I have this problem as well. I have had it on several motherboards, several CPUs, and every version of Ubuntu and Debian I have had. I am currently on Lubuntu 16.04 with kernel 4.4.0-78 and this issue persists.
My CPU has a stock speed of 3166MHz on a 1333MHz bus. If I set my bus to 1600MHz, which runs the CPU at 3800MHz, everything reports CPU speed correctly. However, if I run my bus speed anywhere in between 1333MHz and 1600MHz, the CPU speed is *not* correctly reported. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/379873 Title: CPU Frequency Scaling Monitor reports incorrect CPU speeds when overclocked Status in linux package in Ubuntu: Expired Bug description: The reported frequencies of an overclocked Core 2 Duo are incorrect. Benchmarking and performance testing can confirm that the CPU is running at the overclocked speeds, but the values reported through cpuinfo are the standard stock speeds. CPU has been overclocked from stock 3.00GHz to 3.60GHz. This can be confirmed through dmidecode (output attached). The issue is that cpuinfo (and related utilities) all report the stock CPU speeds instead. This is only a visual/reporting issue. The CPU is still throttling correctly, and the speed is correct as per the overclocking ratio. i.e. (tested and confirmed in benchmarks & Bogomips) Reported 2.00Ghz = (3.6/3.0 * 2.0) = 2.40GHz True Clock Speed Reported 3.00Ghz = (3.6/3.0 * 3.0) = 3.60GHz True Clock Speed There are a few reports of this in the Ubuntu forums, however no resolution had been found. I have updated the BIOS on my motherboard (ASUS P5Q) to the latest available, with no changes. All other BIOS options are per standard - allowing CPU throttling/etc. Bug #132403 makes reference to this similar issue, but this is not a BIOS problem, only a reporting problem. Compare: cat /proc/cpuinfo cpufreq-info dmidecode --type processor Only dmidecode is reporting the correct CPU speed as set in the BIOS. Regards, Robert. --- Architecture: amd64 DistroRelease: Ubuntu 10.04 InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) NonfreeKernelModules: nvidia Package: cpufrequtils 006-2 PackageArchitecture: amd64 ProcEnviron: LANG=en_NZ.utf8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-24.38-generic 2.6.32.15+drm33.5 Tags: lucid Uname: Linux 2.6.32-24-generic x86_64 UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/379873/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
