Arch Linux

max kaspar

Member

Registered: 2013-04-11

Posts: 59

replace powernow-k8 with acpi_cpufreq

The Arch CPU Frequency Scaling wiki states that:

powernow-k8|CPUFreq driver for K8/K10 Athlon64/Opteron/Phenom processors. Deprecated since linux 3.7 - Use acpi_cpufreq.

But if i try to remove the powernow-k8 module with sudo modprobe -r powernow_k8 an error is displayed:

modprobe: FATAL: Module powernow_k8 is in use

And trying to load acpi_cpufreq gives:

modprobe: ERROR: could not insert 'acpi_cpufreq': Device or resource busy

Is there a way to disable powernow-k8 and use acpi_cpufreq?

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: replace powernow-k8 with acpi_cpufreq

Have you tried https://wiki.archlinux.org/index.php/Ke … es#Loading ?

max kaspar

Member

Registered: 2013-04-11

Posts: 59

Re: replace powernow-k8 with acpi_cpufreq

Have you tried https://wiki.archlinux.org/index.php/Ke … es#Loading ?

Yes, and it doesn't help. is there a kernel line commnad to disable powernow-k8?

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: replace powernow-k8 with acpi_cpufreq

There were issues with powernow-k8 not autoloading https://bbs.archlinux.org/viewtopic.php?id=169372 , but you should be able to blacklist it: https://wiki.archlinux.org/index.php/Ke … acklisting

max kaspar

Member

Registered: 2013-04-11

Posts: 59

Re: replace powernow-k8 with acpi_cpufreq

Blacklisted the powernow_k8 module, but trying to load acpi_cpufreq:

modprobe: ERROR: could not insert 'acpi_cpufreq': No such device

What's the difference between powernow_k8 and acpi_cpufreq?