Hi, Verified with lunar linux/6.2.0-34.34 kernel and got expected results.
** Tags removed: verification-needed-lunar-linux ** Tags added: verification-done-lunar-linux -- 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/2030924 Title: [SRU][Ubuntu 22.04.1] Unable to interpret the frequency values in cpuinfo_min_freq and cpuino_max_freq sysfs files. Status in linux package in Ubuntu: Fix Released Status in linux source package in Jammy: Fix Committed Status in linux source package in Lunar: Fix Committed Status in linux source package in Mantic: Fix Released Bug description: [Impact] On DELL EMC PowerEdge system when Ubuntu 22.04.1 OS is Installed, Unable to Interpret the values in cpuinfo_max_freq and cpuinfo_min_freq sysfs files as per the Intel specs document. Steps to Reproduce: 1. Install one CPU that supports DBS "Demand-Based Power Management". 2. Install Ubuntu 22.04.1 OS. 2. Enable "Logical Processor" under CPU Information menu from F2 setup. 3. Save changes and reboot to Ubuntu 22.04.1 OS. 4. Right click on "Computer" and select "File system" and check for the following CPU directories. /sys/devices/system/cpu/cpu0/cpufreq/cpu0 /sys/devices/system/cpu/cpu0/cpufreq/cpu1 5. View the Max Frequency and Min Frequency under CPU0 and CPU1 directory. 6. The Max and Min Frequency did not match as per the Intel specs datasheet. Actual results: /sys/devices/system/cpu/cpu0/cpufreq/cpu0/cpuinfo_max_freq -> 6800000 /sys/devices/system/cpu/cpu0/cpufreq/cpu0/cpuinfo_min_freq -> 800000 /sys/devices/system/cpu/cpu0/cpufreq/cpu0/base_frequency -> 3900000 Expected results: As per Intel datasheet specification. /sys/devices/system/cpu/cpu0/cpufreq/cpu0/cpuinfo_max_freq -> 5300 MHz /sys/devices/system/cpu/cpu0/cpufreq/cpu0/cpuinfo_min_freq -> 800 MHz /sys/devices/system/cpu/cpu0/cpufreq/cpu0/base_frequency -> 3000 MHz [Fix] cpufreq: intel_pstate: Fix scaling for hybrid-capable systems with disabled E-cores https://github.com/torvalds/linux/commit/0fcfc9e51990246a9813475716746ff5eb98c6aa [github.com] [Test Plan] Same as steps to reproduce [ Where problems could occur ] This issue is seen on Intel based system under development which supports DBS "Demand-Based Power Management", then install Ubuntu-22.04 and boot into OS then check for the frequency values under /sys/devices/system/cpu/cpu0/cpufreq/cpu0 Regression risk = Low to medium [ Other Info ] Jammy https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/cpuinfo_freq lunar https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/lunar/+ref/cpuinfo_freq_lunar_2 Mantic https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/mantic/+ref/cpuinfo_freq_mantic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2030924/+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
