knowledge-base/KB/Linux/AMD.md

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

You need to be on Kernel >= 6.3!

amd-pstate allows lower idle CPU frequencies and changes the scheduler. This is not default as of now, but should be enabled.

1. Set any CPPC setting to enabled in BIOS (if available, try without it might also work)
2. Add amd_pstate=active 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