Help with Downgrading Linux Kernels

Hey there, as usual I am facing some issues with nvidia and the latest kernel, So I intend to downgrade to prev kernel but I am unable too

when I install prev kernel, I see an unsigned image installed and available in grub which stucks at logo.

here it is:

shabinder@default-admin:~$ dpkg -l | grep linux-image
rc linux-image-5.11.0-27-generic 5.11.0-27.29~20.04.1 amd64 Signed kernel image generic
rc linux-image-5.11.0-36-generic 5.11.0-36.40~20.04.1 amd64 Signed kernel image generic
rc linux-image-5.11.0-37-generic 5.11.0-37.41~20.04.2 amd64 Signed kernel image generic
ii linux-image-unsigned-5.11.0-36-generic 5.11.0-36.40~20.04.1 amd64 Linux kernel image for version 5.11.0 on 64 bit x86 SMP
ii linux-image-unsigned-5.11.0-37-generic 5.11.0-37.41~20.04.2 amd64 Linux kernel image for version 5.11.0 on 64 bit x86 SMP

as you can see my 5.11.0-36 is marked as rc, but it works fine as opposite to 5.11.0-37 where suspend doesn't work

I want to remove 5.11.0-37 completely and keep 5.11.0-36 as default and 5.11.0-27 as an additional for emergency cases

Can anybody help me out here ?

If you have Synaptic Package Manager installed, you can use it to remove the kernels you are not using.

Once your in Synaptic, type in search box Linux-Headers. You will find huge list, just gotta make sure you mark the right one for removal, and then hit apply.

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This link on how to downgrade the kernel will help. Since Zorin OS is based on Ubuntu you can follow these steps even though they are for Ubuntu.

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