Ubuntu – How to get the newest lowlatency-kernel on 18.04 LTS

Generally speaking it is done by installing packages like -lts-, e.g. linux-generic-lts-utopic for Ubuntu 14.04.

With kernels it is quite easy. But with graphical stack it is not that straight forwared because of dependencies, especially on 64-bit systems. Commands given in that article are not quite correct in many cases and can remove a lot from you system.

It is reversable. But it is better if you specify which version do you run and which kernel/graphics you want to upgrade. Then it will be possible to give you a more specific guide.

-Updates pocket is a part of Ubuntu repositories. You do not need to do anything to install from there, becuse this part is enabled by default.

For Ubuntu 14.04 kernel from Ubuntu 14.10 is available (3.16). It can be installed by running

sudo apt-get install linux-generic-lts-utopic

Very soon kernel from 15.04 (3.19) will be available. It is in proposed repository, and will get to main sime time next week, I guess. It can be installed by

sudo apt-get install linux-generic-lts-vivid

I'm pretty much just guessing here, but it's possible that your system can only boot when certain kernel modules are loaded that are not supplied with the kernel. Then they have to be built using dkms, but this only works if you have the corresponding linux-headers-4.13.0-16-lowlatency package installed. When you install that package, the appropriate kernel modules will automatically be built for you.

In general the headers package should always be installed when an image is installed, but for some reason this does not always automatically happen.