C-states i5-14500t

[Rhiig]

I recently bough an i5-14500T and Asrock Z690M-ITX/ax Motherboard for my Homeserver. Both of which support deeper intel_idle states like c6 or c7, however my proxmox only shows the ACPI 1-3, no intel_idle.
After trying a more recent linux kernel (6.14 instead of 6.8) and even trying windows the result was the same. I believe the problem lies with the intel microcode not having my processor in the intel_idle list.
What should I do now? Will there be a microcode version for c states for my cpu? Are there workarounds?

Thanks for any help.

[DhannielM_Intel]

Hello Rhiig, 

Thank you for posting in the community. To better assist you with this issue, I have a few questions that will help us investigate further. Please provide answers to the following:

• Are you checking the intel_idle states in the BIOS or using the command prompt?
• Is your BIOS updated to the latest version?
• Have you made any changes to the BIOS settings?
• Have you contacted the motherboard manufacturer for additional support?
• Are you using the Intel Default Settings in the BIOS?

Best regards,

Dhanniel M.

Intel Customer Support Technician

[DhannielM_Intel]

Hello Rhiig, 

I wanted to check if you've seen my previous response, which includes some questions to help me investigate the issue further. When you have a moment, please provide your answers. 

Best regards,

Dhanniel M.

Intel Customer Support Technician

[Rhiig]

Hello DhannielM_Intel,
Sorry for the late answer. For some reason the notification landed in my spam folder.
Anyway:
- I have checked the intel_idle state in my bash for proxmox
- I am using the latest bios (microcode 0x12F) and have updated the microcode to 0x3a in proxmox
- Changes that I made: Enabeling C-State support, enabling c-state packages, enabling anything else c-state related, disabling secure boot
- I have not yet contacted the asrock support since I so far believe that the issue is not bios related
- Other from the changed I use default setting (but I undervolt the cpu to offset -100mV)

[DhannielM_Intel]

Hello Rhiig, 

Thank you for providing your answers. Based on our investigation, the issue may be related to either the BIOS configuration or the Linux operating system. To help narrow down the cause, I have a few clarifications and suggestions:

• BIOS Configuration:
  • Please ensure that your BIOS settings are correctly configured to support deeper C-states. Verify if the ACPI C6x Enumeration is set to map C6 as ACPI C2. Additionally, check if the Package C State is configured to allow deeper Package C-States, such as C6. If you have already checked these settings, please let me know.
• Linux OS Configuration:
  • If the driver does not recognize your processor's deeper C-states, it may default to ACPI states. You can check the current idle states using the cpupower idle-info command. If deeper states are disabled, you can attempt to enable them using cpupower idle-set.

Please let me know if you have already tried these recommendations. Additionally, could you provide the specific Linux distribution and version you are using? 

Best regards,

Dhanniel M.

Intel Customer Support Technician

[Rhiig]

I have ensured that my bios supports the deeper c states. I've even flashed and reinstalled the bios multiple times.
I use the proxmox kernel based on debian.
The intel_idle.c does not have the i5-14500t or any raptorlake cpu coded in. I've emailed the creators of the file, who explained the things to me and were really helpful.
Since the acpi c3 states is based on c10 and the acpi c2 is based on c6 I came to the conclusion that the specific "normal" c states would probably not save much power, if any.
Thats why I'd like to mark this as done.

Best regards,
Rhiig

[DhannielM_Intel]

Hello Rhiig, 

As you wish to mark this thread as complete, I will proceed to close this inquiry. If you require further assistance, please feel free to submit a new question, as this thread will no longer be actively monitored.

Best regards,

Dhanniel M.

Intel Customer Support Technician