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Old 08-13-2019, 01:17 AM   #1
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modprobe acpi-cpufreq returns unknown symbols

I'm trying to enable software CPU throttling in Linux by turning on the acpi-cpufreq driver or any other driver for that matter.

When I tried acpi-cpufreq driver, I get the following errors in dmesg:

acpi_cpufreq: Unknown symbol acpi_processor_notify_smm
acpi_cpufreq: Unknown symbol acpi_processor_unregister_performance
acpi_cpufreq: Unknown symbol acpi_processor_preregister_performance
acpi_cpufreq: Unknown symbol acpi_processor_register_performance

Old 08-13-2019, 08:19 AM   #2
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You don't say anything about what flavor of linux that you are using.
Or how you are loading it, or the config.
Old 08-13-2019, 01:40 PM   #3
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It's because Threadripper in it's newest incarnation is difficult to support. Try changing the UEFI settings. Then download the latest BIOS update and firmware.
Old 08-17-2019, 05:41 AM   #4
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Perhaps some info would help people here to help you. For example:

uname -a
cpufreq-info / cpupower frequency-info
etc etc.

What distro is it? Did you configure the Kernel yourself?


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