14

I am currently on ubuntu 22.04 LTS release which comes with kernel version 5.15.0-27-generic. I want to downgrade to kernel version 5.13 because of touchpad problem in my lenovo thinkbook.

Is it possible to downgrade the baked in kernel in 22.04 LTS release? If yes, how do I achieve it?

Haresh Samnani
  • 245

3 Answers3

17

You can try below actions to use pimlie / ubuntu-mainline-kernel.sh:

wget https://raw.githubusercontent.com/pimlie/ubuntu-mainline-kernel.sh/master/ubuntu-mainline-kernel.sh
chmod +x ubuntu-mainline-kernel.sh

search and find your wanted version


ubuntu-mainline-kernel.sh -r | grep 5.13


install that version kernel


ubuntu-mainline-kernel.sh -i v5.13.19


get all menuentries


grep 'menuentry |submenu ' /boot/grub/grub.cfg | cut -f2 -d "'"


change the grub configuration


vi /etc/default/grub
from: GRUB_DEFAULT=0
to: GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 5.13.19-051319-generic"


update grub


update-grub


reboot


reboot now


verify


uname -r
Álvaro González
  • 103
  • 4
xiaojueguan
  • 304
3

I have updated this answer by @xiaojueguan.

Changes in comparison with that answer:

  • add a variable to define the kernel version to use;
  • use curl instead of wget;
  • get the oldest kernel version Grub entry name programmatically;
  • update the Grub config programmatically;
  • disable upgrading the Linux kernel packages.
# Choose kernel version to install
kernel_version='6.5.0'

Install the old kernel


curl -sL https://raw.githubusercontent.com/pimlie/ubuntu-mainline-kernel.sh/master/ubuntu-mainline-kernel.sh | bash -s -- -i "v$kernel_version"


Get the Grub entry name


Note: Do verify the value of grub_entry_name. The following command gets


the oldest kernel version Grub entry name that is not a recovery mode.


Example value: Ubuntu, with Linux 6.5.0-45-generic


grub_entry_name="$(grep -Po "menuentry '\KUbuntu, [^(']+" /boot/grub/grub.cfg | sort -V | head -1)"


Update grub


sed -i "s/^\sGRUB_DEFAULT=.$/GRUB_DEFAULT='Advanced options for Ubuntu>$grub_entry_name'/" /etc/default/grub
update-grub


Disable the kernel package upgrade


apt-mark hold $(dpkg --get-selections | grep -Po "^linux[^\t]+${grub_entry_name##* }")


Reboot system


reboot


Check the currently booted Linux kernel version


uname -r
tukusejssirs
  • 205
0

In my case, after clean install of lubuntu-22 on Dell-Inspiron_5570, experienced "elantech touchpad problem" due to which "two finger scrolling" was not working. After 4-5 hectic days on the work dealing with the arrow keys on keyboard, I found it as kernel incompatibility. Then, tried installing different kernel versions following @xiaojueguan answer and found the version 5.15.0-58-generic to be working for me.

Prashant Kumar Kashyap
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