How do I switch between different kernel versions in Manjaro?

The Linux kernel serves as the core of the operating system, and Manjaro Linux provides users with the flexibility to choose between different kernel versions to suit their hardware and preferences. In this comprehensive guide, we will explore the process of switching between different kernel versions in Manjaro, allowing users to optimise their system for performance, compatibility, and stability.

Understanding Kernel Versions in Manjaro

1. Kernel Variants:

• Manjaro offers multiple kernel variants, including the latest stable kernel, Long-Term Support (LTS) kernels, and real-time kernels. Each variant caters to specific user needs, with LTS kernels prioritising stability and the latest kernels offering cutting-edge features and hardware support.

2. Kernel Versioning:

• Manjaro’s kernel versions are identified by a combination of the mainline version and additional identifiers. For example, a kernel version might be displayed as 5.10.68-1-MANJARO, where 5.10.68 is the mainline version, and 1-MANJARO indicates that it’s a Manjaro-specific build.

Switching Kernel Versions in Manjaro

1. Using Manjaro Settings Manager:

• Manjaro provides a user-friendly tool, the Manjaro Settings Manager, to manage kernel installations. Open the application menu and search for “Manjaro Settings Manager” to launch it.

2. Accessing Kernel Settings:

• In the Manjaro Settings Manager, navigate to the “Kernel” section. This section provides an overview of installed kernels and allows users to switch between them.

3. Selecting a Kernel:

• The list of available kernels includes the latest stable version, LTS versions, and potentially other variants. Select the desired kernel version from the list.

4. Install or Remove Kernels:

• Use the “Install” and “Remove” buttons to add or remove specific kernel versions. Manjaro Settings Manager will handle the installation or removal process.

5. Grub Configuration:

• Manjaro uses GRUB (GRand Unified Bootloader) as the default boot manager. When you switch kernel versions, GRUB is automatically updated to reflect the changes. During the boot process, GRUB will display a menu allowing you to choose the desired kernel.

6. Command-Line Method:

• Advanced users may choose to switch kernels using the command line. To install a new kernel, use the following command:

sudo mhwd-kernel -i linux<version>

• To remove a kernel:

sudo mhwd-kernel -r linux<version>

7. Configuring GRUB Manually:

• For users who prefer manual control, it’s possible to configure GRUB manually. Edit the GRUB configuration file at /etc/default/grub and update the GRUB_DEFAULT variable with the desired kernel index.

8. Checking Installed Kernels:

• Verify installed kernels using the following command:

mhwd-kernel -li

Kernel Maintenance and Best Practices

1. Regular Updates:

• Keep your installed kernels up to date with regular system updates. Manjaro’s package manager, Pacman, will automatically update installed kernels when new versions are available.

2. Testing and Stability:

• Consider the balance between the latest features and stability when choosing a kernel. For critical systems, LTS kernels may provide a more stable experience, while the latest kernels offer bleeding-edge features.

3. Backup Before Switching:

• Before switching to a new kernel version, especially for major updates, it’s advisable to create a system backup. This ensures that you can revert to a previous state in case of compatibility issues.

4. Troubleshooting:

• If you encounter issues with a specific kernel version, you can easily switch back to a different one using the methods outlined in this guide. This flexibility is a strength of Manjaro, allowing users to find the most compatible kernel for their hardware.

Conclusion

Manjaro’s approach to kernel management empowers users to tailor their Linux experience based on their hardware, preferences, and the level of stability they require. By using the Manjaro Settings Manager or command-line tools, users can easily switch between different kernel versions. Whether seeking the latest features or prioritising stability, Manjaro provides the tools to fine-tune the kernel to match specific needs. Understanding how to manage and switch between kernel versions ensures that Manjaro users can optimise their system’s performance and compatibility.