How to enable Real-time kernel#
Real-time kernel is only supported on 22.04. For more information, please see https://ubuntu.com/realtime-kernel
Enable and auto-install#
Once you enable Real-time kernel, enabling some Pro services will not be possible. For a better view of which services are compatible with Real-time kernel, please look at the services compatibility matrix
enable Real-time kernel through the Ubuntu Pro Client, please run:
$ sudo pro enable realtime-kernel
You’ll need to acknowledge a warning, and then you should see output like the following, indicating that the Real-time kernel package has been installed.
One moment, checking your subscription first The Real-time kernel is a beta version of the 22.04 Ubuntu kernel with the PREEMPT_RT patchset integrated for x86_64 and ARM64. This will change your kernel. You will need to manually configure grub to revert back to your original kernel after enabling real-time. Do you want to continue? [ default = Yes ]: (Y/n) yes Updating package lists Installing Real-time kernel packages Real-time kernel enabled A reboot is required to complete install.
After rebooting you’ll be running the Real-time kernel!
Enable and manually install#
The –access-only flag is introduced in version 27.11
If you would like to enable access to the Real-time kernel APT repository but
not install the kernel right away, use the
--access-only flag while enabling.
$ sudo pro enable realtime-kernel --access-only
With this extra flag you’ll see output like the following:
One moment, checking your subscription first Updating package lists Skipping installing packages: ubuntu-realtime Real-time kernel access enabled
To install the kernel you can then run:
$ sudo apt install ubuntu-realtime
You’ll need to reboot after installing to boot into the Real-time kernel.
Real-Time Kernel is not compatible with Livepatch. If you wish to use the Real-Time Kernel but Livepatch is enabled,
prowill warn you and offer to disable Livepatch first.