FATAL: Error inserting acpi_cpufreq

Billy K asked:

Trying to see how to force CPU to run at higher freq on a HP ProLiant system with SLES 11 SP2.

/# modprobe -vv acpi-cpufreq
insmod /lib/modules/3.0.13-0.27-default/kernel/drivers/cpufreq/acpi-cpufreq.ko
FATAL: Error inserting acpi_cpufreq (/lib/modules/3.0.13-0.27-default/kernel/drivers/cpufreq/acpi-cpufreq.ko): Input/output error

Module is there.

/# ls -l /lib/modules/3.0.13-0.27-default/kernel/drivers/cpufreq/acpi-cpufreq.ko
-rw-r--r-- 1 root root 28864 Feb 15  2012 /lib/modules/3.0.13-0.27-default/kernel/drivers/cpufreq/acpi-cpufreq.ko

and I don’t have noacpi in the boot command.

any hint?

My answer:

On an HP ProLiant server, you may need to use the pcc_cpufreq module instead of acpi_cpufreq.

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