Adding new kernel in Manjaro

manjaro_kernel.md

Installing a new kernel in Manjaro

There are several alternatives:

1. Download a pre-compiled kernel from the Manjaro repos.
2. Download a source kernel from the Manjaro repos and compile it. This should optimize the binaries for your chipset.
3. Download a source kernel from https://www.kernel.org/ and compile it. Optimized, but harder to configure :-/

1. Using a pre-compiled kernel:

See https://wiki.manjaro.org/index.php/Manjaro_Kernels

$ sudo mhwd-kernel -i linux62

2. Using a Manjaro-tuned source kernel:

1. Download a kernel (you can see the available kernes at https://gitlab.manjaro.org/packages/core). None of the following commands are run as root:

$ git clone https://gitlab.manjaro.org/packages/core/linux62

2. Configure the kernel:

$ cd linux62
$ nano config  # Notice that there are two entries to modify

  ##########
  # Before #
  ##########

  CONFIG_PREEMPT_BUILD=y
  # CONFIG_PREEMPT_NONE is not set
  <--------- here
  # CONFIG_PREEMPT_VOLUNTARY is not set
  CONFIG_PREEMPT=y   <----------- here
  CONFIG_PREEMPT_COUNT=y
  CONFIG_PREEMPTION=y
  CONFIG_PREEMPT_DYNAMIC=y
  CONFIG_SCHED_CORE=y

  #########
  # After #
  #########
  
  CONFIG_PREEMPT_BUILD=y
  # CONFIG_PREEMPT_NONE is not set
  CONFIG_PREEMPT_VOLUNTARY=y
  # CONFIG_PREEMPT_VOLUNTARY is not set
  # CONFIG_PREEMPT=y
  CONFIG_PREEMPT_COUNT=y
  CONFIG_PREEMPTION=y
  CONFIG_PREEMPT_DYNAMIC=y
  CONFIG_SCHED_CORE=y

$ updpkgsums

3. Compile:

$ makepkg -s

4. Install everything (kernel and modules):

This also updates GRUB's configuration files.

$ makepkg -i