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creation date: 2022-08-15
tags: [note,amd,cpu,linux,cppc]
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`amd-pstate` allows lower idle CPU frequencies. This is not default, let's enable it.

1. Set any CPPC setting to `enabled` in BIOS (if available, try without it might also work)
2. Add `amd_pstate.shared_mem=1` as Kernel parameter
3. Add `amd-pstate` by editing `/etc/modules-load.d/amd-pstate.conf` and inserting `amd_pstate` into the file
4. Reboot
5. Verify 
	1. if you get low frequencies with  `watch -n1 "grep \"^[c]pu MHz\" /proc/cpuinfo"`
	2. if you get the proper scaling driver with `/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver`