[Bug 218705] amd_pstate fails to load on AMD 5950x with Asus ROG CROSSHAIR VIII DARK HERO x570

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218705

--- Comment #4 from Perry Yuan(AMD) (Perry.Yuan@amd.com) ---
(In reply to Andrei Amuraritei from comment #0)
> Hi!
> 
> Sorry if the formatting is broken or this is unreadable. Description preview
> is broken it seems.
> 
> amd_pstate fails to load on this hardware:
> CPU: AMD 5950x
> Mainboard: Asus ROG CROSSHAIR VIII DARK HERO x570 running UEFI version 4702
> OS: Fedora 39 Wayland with kernel Linux 6.8.4-200.fc39.x86_64
> 
> amd_pstate does not get automatically enabled. dmesg -T | grep pstate says: 
> 
> [Tue Apr  9 17:24:36 2024] amd_pstate: driver load is disabled, boot with
> specific mode to enable this
> 
> No cppc found in output from lscpu. In UEFI the following are activated:
> 
> Advanced > AMD CBS > NBIO Common Options > SMU Common Options
> 
> CPPC (Auto / Enabled / Disabled): Enabled
> CPPC Preferred Cores: Enabled

Hi Andrei
Could you use the script to check the CPPC capabilities？
As I know, the 5950x is in the CPPC supported list, I need more information to
check what the system is missing.

Perry.

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