CPPC is disabled after BIOS update F36

[IamSanjarbek]

On 26th April, HP released a BIOS update for my laptop (HP Laptop 15-ef2126wm, AMD Ryzen 5 5500U with Radeon Graphics). I successfully installed this update and tried to use Linux (dual boot). So far, Linux and Windows were working seamlessly, yet this BIOS update disabled CPPC, so amd pstate drivers in Linux couldn't use CPPC so did not work. I have to use either the old acpi-cpufreq drivers or need to enable CPPC again. I tried Smokeless_UMAF and enable CPPC, but it did not work. What can I do now? Can HP developers fix this issue? I am a computer scientist, so I need Linux to work.

[Kuroi_Kenshi]

Hi @IamSanjarbek,

Welcome to the HP Support Community! 

Thanks for reaching out about your query regarding your laptop!

We're thrilled to have the opportunity to assist you and provide a solution.

Try these steps:

Access BIOS Settings:

• Restart your laptop and as it boots, press the Esc key repeatedly until the Startup Menu opens.
• Select F10 to enter the BIOS Setup.

Update BIOS Settings:

• Navigate to the Advanced tab.
• Look for CPU settings or similar and check if you can find an option related to CPPC. Ensure that CPPC is enabled.
• If you don’t see specific CPPC settings, try restoring the BIOS to default settings to see if this re-enables CPPC.

Revert to Previous BIOS Version:

• If the new BIOS version does not support enabling CPPC, you might want to revert to the previous BIOS version.
• Download the previous version of the BIOS from the HP Customer Support - Software and Driver Downloads page.
• Follow the instructions to safely downgrade your BIOS to the previous version that worked with CPPC.

Check for Linux Solutions:

• If updating BIOS or reverting does not solve the issue, consult with Linux community forums as there might be patches or workarounds available for this specific hardware and BIOS combination.

Alternative Performance Drivers:

• Since you mentioned alternative drivers, you might temporarily use acpi-cpufreq while seeking a more permanent solution from BIOS or HP support.

I hope this helps.

I'm glad I could help! 😊 If this resolved your issue, please mark it as "Accepted Solution" and click "Yes" on "Was this reply helpful?" Your feedback not only keeps us going but also helps others find the solution faster! 👍✨

Take care and have an amazing day ahead! 🚀

Best regards,

[IamSanjarbek]

BIOS doesn't have Advanced options thanks to HP's security concerns. Also Resetting BIOS settings doesn't help either. The previous BIOS update had CPPC enabled, however, it cannot be reinstalled as HP doesn't allow downgrading BIOS. I couldn't find any workarounds for this issue except blocklisting amd_pstate and use the basic driver. I wrote feedback a couple of times using HP Support Assistant, is there any chance of being checked? Could HP developers read this and fix?

[Garp_senchau]

Hey @IamSanjarbek, 

Thanks for reaching out! Since the issue remains unresolved, I suggest contacting our phone/chat support team for personalized assistance. They can provide one-on-one help and may even be able to work their remote assistance magic to fix the problem.

Note: There might be a nominal charge for the service they provide.

Regards,