After Disabling Collaborative Power Control into firmware instead of getting:
$ cat ./sys/devices/system/cpu/cpuX/cpufreq/scaling_driver pcc-cpufreq we get $ cat ./sys/devices/system/cpu/cpuX/cpufreq/scaling_driver acpi-cpufreq Meaning that acpi-cpufreq is giving intel_pstates good initialization parameters. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1447763 Title: HP Proliant Servers suffer from cpufreq initialization failure for some cpu cores To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1447763/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
