How to Install Linux Kernel 6.15 on Ubuntu 25.04 and Ubuntu 24.10

How to Install Linux Kernel 6.15 on Ubuntu 25.04 and Ubuntu 24.10

The most recent stable kernel is Linux 6.15, which Ubuntu users can install on their computers by using the official Ubuntu Mainline Kernel PPA archive. Here’s a brief guide on using the GUI and CLI to accomplish it. With new features like Rust support for hrtimer and ARMv7, a new setcpuid= boot parameter for x86 CPUs, support for sched_ext to count and report internal events, improvements to the x86 Intel and AMD PMU, nested virtualization support for VGICv3 on ARM, and more, Linux kernel 6.15 was released on May 25th, 2025.

How to Install Linux Kernel 6.15 on Ubuntu 25.04 and Ubuntu 24.10

The preferred and the most easiest way to install Linux kernel 6.15 on your Ubuntu is by using a graphical tool called Mainline Kernels. You can easily install it from this PPA by running the following commands in the Terminal.

Method 1: Install Mainline Kernels Tool In Ubuntu

Run the following commands.

sudo add-apt-repository ppa:cappelikan/ppa
sudo apt update && sudo apt full-upgrade
sudo apt install -y mainline

Once the Mainline Kernels tool is installed, you can check the availability of all kernel versions from Canonical’s Mainline Kernel PPA. The tool will quickly  archive and will list Linux kernel 6.15 at the top of the list. Click on the “6.15” entry to select it and then click on the big “Install” button. Wait for the installation to complete and then reboot your computer.

Method 2: Install Linux kernel 6.15 on Ubuntu via CLI

This one is for the pro users or those users who love to do things on Ubuntu via Command line.  In this process, you need to manually download  and install the Linux 6.15 kernel packages from the official Ubuntu mainline kernel PPA archive  for your specific architecture (64-bit (amd64), AArch64 (ARM64), ARMhf, PowerPC 64-bit Little Endian (ppc64el), or IBM System z (s390x))

linux-headers-6.15.0-061500-generic_6.15.0-061500.202505260036_amd64.deb
linux-headers-6.15.0-061500_6.15.0-061500.202505260036_all.deb
linux-image-unsigned-6.15.0-061500-generic_6.15.0-061500.202505260036_amd64.deb
linux-modules-6.15.0-061500-generic_6.15.0-061500.202505260036_amd64.deb

Once you have downloaded all the kernel packages in the respective folder, you need to install them all at once by running the sudo dpkg -i *.deb command.

How to revert baack Ubuntu’s default kernel

This steps is important if you experience any issues running Linux kernel 6.15 and you want to go back to Ubuntu’s default kernel. You need to press the Esc key when your computer boots to view the boot menu, then access the “Advanced options” boot entry and select a different kernel version from the list of available kernels. You won’t have any issues onward as it revert back to the default kernel or any other working kernel that you have selected.