How To Use The New AMD P-State Driver With Linux 5.17

[loganj]

Sometimes, if a new feature enters the kernel, the usage of the feature is changed (or improved) during the next releases. This is the case here, too. Just adding amd_pstate=passive to the boot parameter worked for my 6.1 kernel. For example in Ubuntu, this can be achieved by changing the variable GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub .

thank you. i had no clue that they change the way to make it work. i've tried everything and thought that my laptop does not support it. but now with your help it finally works

[svenh]

Sometimes, if a new feature enters the kernel, the usage of the feature is changed (or improved) during the next releases. This is the case here, too. Just adding amd_pstate=passive to the boot parameter worked for my 6.1 kernel. For example in Ubuntu, this can be achieved by changing the variable GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub .

[shanedav4]

None of the commands in this article work anymore with Kernel 6.1-6.2rc7. The module isn't even there and yes it was enabled at compile time.

[Desti]

B450M-A option is activated in BIOS, but not reported by kernel. I wonder if this requiriere UEFI boot like resizeBAR.

[svenh]

Has anyone got ACPI CPPC enabled on ASUS PRIME?

There are so many boards of this name. Asus PRIME B650-PLUS with BIOS 0805 and 0809 enables CPPC by default.

[Desti]

Has anyone got ACPI CPPC enabled on ASUS PRIME?

[V1tol]

Linux kernel 5.18.11 has broken the amd_pstate driver

It was fixed in 5.18.13.

[sdack]

Linux kernel 5.18.11 has broken the amd_pstate driver, or the method described here no longer applies, and it no longer works. Either way 5.18.10 is still working as expected.

When using Ryzen Master on Windows with a 2700X, it tells me the fastest CPU core which I believe is simlar to how CPPC works? I hear CPPC starts at Zen 2, but how is Ryzen Master doing what it does on Zen+?

[ruffnekk]

Tested with fedora 36 and AMD Ryzen 9 3900X, needed steps:

sudo grubby --args=initcall_blacklist=acpi_cpufreq_init --update-kernel=ALL
sudo grubby --args=amd_pstate.shared_mem=1 --update-kernel=ALL

➜ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate

What do I have to do to revert that?

I tested it on Fedora 35, it worked, but I haven't found any advantages using it right now...