Introduction
If you are experiencing the "No or Unknown CPUFREQ Driver Is Active on This CPU" error message, it means that the internal frequency adjustment in your CPU (called CPUFREQ) isn't working correctly. This error can have several different causes, ranging from incorrect settings in your BIOS or Ubuntu setup to outdated Linux kernel driver modules. In this article, we will look at the steps necessary to fix this error.
Prerequisites
Before attempting any of the suggested solutions, make sure that you have a full backup of all of your system files and settings. Additionally, you should also have an Ubuntu Live CD on hand in case of an emergency.
Troubleshooting
The following are some basic steps you can take to try and resolve the issue.
Checking BIOS Settings
The first thing to check is your BIOS settings. If you're using an older version of the BIOS, it may be necessary to upgrade it to a newer version. This is easy to do on most computers and can be done from within the BIOS menus.
Check if Kernel Modules are Up to Date
Next, you should check if all of your kernel modules are up to date. To do this, enter the following command into the terminal:
sudo apt-get update
Use the cpufreq-set Command
If the above steps do not work, try using the cpufreq-set command. This command will set the CPUFREQ settings in your BIOS to the correct values. To use the command, enter the following into the terminal:
sudo cpufreq-set --governor ondemand
After running this command, reboot your system to see if the error is resolved.
Updating the Linux Kernel
If all of the above steps fail, you may need to update the Linux kernel. To do this, enter the following command into the terminal:
sudo apt-get update
Follow the on-screen instructions to update the kernel.
FAQ
What is the "No or Unknown CPUFREQ Driver Is Active on This CPU" error?
The "No or Unknown CPUFREQ Driver Is Active on This CPU" error is an indication that the internal frequency adjustment in your CPU (called CPUFREQ) isn't working correctly.
How can I fix this error?
To fix this error, you may need to upgrade your BIOS to a newer version, check that you have all of the necessary kernel modules, use the cpufreq-set command, or update your Linux kernel.
What is CPUFREQ?
CPUFREQ (also known as CPU frequency scaling) is a technology used to adjust the frequency at which a processor operates. It is used to conserve power and can lower the processor frequency when not running any applications.
What does the cpufreq-set command do?
The cpufreq-set command is used to set the CPUFREQ settings in your BIOS to the correct values.
What is the best way to backup my system files and settings?
The best way to backup your system files and settings is to use a backup system such as Acronis or Time Machine. This will create a full backup of your system, including all of your personal files and settings.