Basically you install linux-lowlatency and reboot. Grub will prefer it over the generic kernel. Make sure that you also get linux-modules-extra in the lowlatenc

Basically you install linux-lowlatency and reboot. Grub will prefer it over the generic kernel. Make sure that you also get linux-modules-extra in the lowlatency version or you might boot into a system with missing drivers. Happened on my laptop when I switched to lowlatency.