On 29/10/2022 15:19, Matti Pulkkinen wrote:

On Sat, 2022-10-29 at 12:01 +0100, lejeczek via users wrote:

...

Hi guys.

Does anybody use 'amd-pstate' and if yes could share a howto on how to have Fedora use that driver?

many thanks, L.

If you have a Zen2 or newer AMD processor, you can use a grubby command in a terminal to set the needed kernel argument:

sudo grubby --update-kernel DEFAULT --args "initcall_blacklist=acpi_cpufreq_init"

Then, after a reboot, you can use this command to see if it worked:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver

If that says something other than amd-pstate then it did not work, and you can try adding another kernel argument and then rebooting:

sudo grubby --update-kernel DEFAULT --args "amd_pstate.shared_mem=1"

but is there a module? I cannot find it default/repo kernels. I see _amd_pstate_ut_ which says is a "test module" Is there still no official/approved p-state in f38, even with 6.5.x?