ALVR performance can be hinder by Kernel version

[snagar]

Background:
I installed Nobara v39 NV version + KDE, and had an overall good experience with ALVR and my Quest 3.
The kernel version was: kernel-6.10.2-200.fsync.fc40.x86_64.

Two weeks ago I upgraded to Nobara v40.
The kernel at that time was: "kernel-6.8.12-201.fsync.fc40.x86_64" and few days afterwards there was an update that bumped the kernel to "kernel-6.10.2-200.fsync.fc40.x86_64".

When I tried to play NoMansSky, the performance was awful to say the least. It was Jagy as hell, sound was choppy and total "nightmare".
I did not experience this performance before, nor when I tested from Windows.

My non scientific conclusion was that the Kernel might disrupt the performance.

When I reboot and picked the previous kernel version: "kernel-6.8.12-201.fsync.fc40.x86_64", all worked as expected (I tested it for a 2 hours session).

My suggestion is to be cautious with the kernel you use for gaming in Linux. In this case, It had profound issues with the ALVR performance, and I did not tested 2D performance games, but since everything worked fine for me with the V40 base kernel, I felt comfortable to remove it.

If you have any similar experiences or found solution, please share.

Cheers

EDIT 1:
Here are few commands I used to exclude the kernel from grub (execute as root):

## List all kernels
rpm -qa kernel
or
dnf list installed kernel

## change directory to boot
cd /boot

## create a backup folder
mkdir bkup
mkdir -p bkup/loader/entries

## Move all files with the kernel version name to the backup folder
mv *{kernel number}* bkup  (example: mv *6.10.2-200* bkup)
mv loader/entries/*6.10.2-200* bkup/loader/entries/

## Rebuild GRUB2 menu
grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg

## test if all works as expected
reboot

I also removed the kernel using the dnf command, but I'm not sure it is necessary. My thought was, I would like to keep the last stable kernels that worked fine in all aspects so future kernel upgrades won't remove the "older" but stable ones.