knowledge-base/KB/Linux/AMD.md

creation date	tags
2022-08-15	note amd cpu linux cppc

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