Hello
I’m running on Ubuntu 20.04 with a jetpack 5.1.3 and i want to know if its possible to change the version of the kernel that i have and how to do it.
You pretty much have to stick with the kernel releases supplied with the compatible L4T release (L4T is just Ubuntu plus NVIDIA drivers). See:
https://developer.nvidia.com/linux-tegra
In the L4T R36.x, which is a developer preview and only valid on Orin (Xavier cannot use this) the software is switching over to mainline Linux kernels. There won’t be any support for this on Xavier.