Update from email: Intel_pstate driver is part of CPU performance scaling system which is focus on performance scaling. (https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/pm/cpufreq.html) And the Linux kernel supports CPU performance scaling by means of the CPUFreq (CPU Frequency scaling) subsystem that consists of three layers of code: the core, scaling governors and scaling drivers(intel_pstate).
Intel_idle driver is for CPU idle time management. (https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/pm/intel_idle.html?highlight=intel_idle) It is the default CPU idle time management driver for the Nehalem and later generations of Intel processors IceLake support Intel_pstate. Currently Intel_pstate is platform independent, not special code of ICX. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- 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/1951941 Title: Icelake cpus are not showing intel_pstate support on 20.04, 20.10, 21.04, 21.10 (ga & hwe kernels) Status in linux package in Ubuntu: Confirmed Bug description: Icelake cpus are not showing intel_pstate support on 20.04, 20.10, 21.04, 21.10 (ga & hwe kernels). Intel wants to investigate this, and they want to see if there are missing patches that could resolve this. [steps] $ dmesg | grep "intel_pstate" [actual] > intel_pstate: CPU model not supported [expected] > intel_pstate: supported [details] lore.kernel.org reference: https://yhbt.net/lore/all/CAAYoRsUcyFsFWDE=r+amgdba6hcgxgte2jj_nhas5e4tdgi...@mail.gmail.com/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1951941/+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
