Ubuntu 22.04 users can now upgrade their systems to Linux kernel 6.5, which brings several notable improvements in hardware compatibility, performance, and new feature support. This kernel update is specifically helpful for those running newer hardware or wanting better system responsiveness and stability.

Reasons to Upgrade to Linux Kernel 6.5

Linux kernel 6.5 offers concrete improvements compared to the previous HWE kernel (version 6.2). Here are some key benefits you'll notice:

  • Improved performance and power efficiency on AMD Ryzen Zen 2 CPUs and newer.
  • Faster parallel direct I/O overwrites on EXT4, Ubuntu's default filesystem.
  • Rumble support for Microsoft Xbox controllers.
  • Working audio output on ASUS ROG Ally devices.
  • Support for Intel TPMI technology.
  • AMD FreeSync enabled automatically for smoother graphics.
  • Initial support for MIDI 2.0 and USB4 v2.
  • Early enablement of Wi-Fi 7 technology.

These updates collectively improve the user experience by addressing specific hardware and performance issues present in earlier kernels.

The simplest and safest way to upgrade your kernel is through Ubuntu's official repositories. This method ensures compatibility and ease of use.

Step 1: First, check your current kernel version by opening a terminal and running:

uname -r

This command displays your current kernel. For example, you might see 5.15.0-60-generic.

Step 2: Update your system's package list to ensure you have the latest available packages:

sudo apt update

Step 3: Upgrade your system, including the kernel, by running:

sudo apt full-upgrade

This command will automatically install the Linux kernel 6.5 packages provided by Ubuntu. After completion, reboot your system to activate the new kernel:

sudo reboot

After rebooting, run uname -r it again to verify that your system is now running Linux kernel 6.5.

Method 2: Install the Latest Mainline Kernel (Advanced Users)

For users who prefer to use the absolute latest kernel directly from the Linux Mainline, you can install Linux kernel 6.5 using a graphical tool called Mainline Kernels Installer, provided via an unofficial PPA.

Step 1: Add the Mainline Kernels Installer PPA to your system by running:

sudo add-apt-repository ppa:cappelikan/ppa

Step 2: Update your system and install the Mainline Kernels Installer:

sudo apt update && sudo apt install mainline

Step 3: Launch the Mainline Kernels Installer from your applications menu. Select Linux kernel 6.5 from the list and click the "Install" button.

Step 4: After installation, run the following command to fix any broken dependencies:

sudo apt --fix-broken install

Finally, reboot your system to activate the kernel:

sudo reboot

Confirm the installation by checking your kernel version again with uname -r.

Caution: Mainline kernels are not officially supported by Ubuntu and may not receive security updates. Use this method only if you specifically need features or hardware support unavailable in the official repositories.

Method 3: Manual Kernel Installation via Command Line (Experts Only)

This method involves manually downloading and installing kernel packages directly from Ubuntu's kernel archive. It is recommended only for experienced users familiar with troubleshooting potential boot issues.

Step 1: Visit the Ubuntu Mainline Kernel Archive and download the appropriate kernel packages for your architecture (usually amd64).

Step 2: Place all downloaded .deb files into a single directory, then navigate to that directory in your terminal.

Step 3: Install the downloaded kernel packages using:

sudo dpkg -i *.deb

Step 4: After installation, reboot your system:

sudo reboot

If you encounter issues with the newly installed kernel, reboot your system again and select an older kernel from the GRUB advanced options menu.

Upgrading your Ubuntu 22.04 system to Linux kernel 6.5 can significantly improve your hardware support and overall system performance. Choose the method that best matches your experience level and needs, and enjoy the benefits of this kernel update.