How do I downgrade the Linux kernel version to 4.9

[joe2313]

I wanted to downgrade to an older kernel verison which is 4.9. Reason being is that after trying another Linux distro that uses 4.9, it ran much smoother on my PC so I want to use 4.9.

I did install `ukuu` and I did install 4.9 but after rebooting, Kubuntu still uses 4.18. How do I change to 4.9?

[oshunluvr]

GRUB will always default to the newest kernel you have installed. You'll have to manually select the other kernel from your boot menu. You can set the default boot selection by editing /etc/default/grub.

[joe2313]

Thank you.

[v7peer]

When you are running the older kernel do:
1. remove the newer kernel(s)
2. put the kernel on hold (so it will not longer be updated)
3. update grub

sorry, I forgot the commands.