Kernel Upgrade Help


Nov 28, 2021
I want to upgrade my kernel to pve-kernel-6.1.0-1-pve, but I would really like to understand a couple of things before I attempt this.
  • Difference between certain commands
  • Installing new kernel
  • Testing new Kernel, Permanently Changing to New Kernel
  • Reverting to previous version kernel
My host storage is ZFS on mirrored drives, and uses the sytemd-boot bootloader. Intel i5-12500 with an iGPU UHD770.

Understanding Commands
I would like to confirm whether these two commands do the same thing. So far I have only used the first one after following procedures to passthrough my dedicated GPU. Which included enabling iommu, blacklisting drivers, and configuring vfio.
  • update-initramfs -u -k all
  • proxmox-boot-tool refresh
Installilng new kernel
What do I need to do to just install a new kernel without configuring the system to use it.

In the Opt in threads the instructions are:
  • apt update
  • apt install pve-kernel-6.1
  • reboot
In my case I would like to specifically install pve-kernel-6.1.0-1-pve. Do I need to install the associated pve-headers?

What commands should I be running.
  • apt update
  • apt install pve-kernel-6.1.0-1-pve
  • apt install-pve-headers-6.1.0-1-pve
Do i need to reboot at this point?

Testing new Kernel, Permanently Changing to New Kernel
From reading it seems I should be using proxmox-boot-tool kernel after installing the new kernel.

I am not able to determine how the automatically selected kernels make it to the list when running proxmox-boot-tool kernel list. Will my above installed kernel be on the automatic list or will I have to add it manually?

Do I then PIN the new kernel and pass teh --next-boot argument so it's only for the next boot?
How do I make the change permanent?

Do I need to update the /etc/kernel/cmdline file for every kernel, or does it apply to which ever kernel is selected in the bootloader?

Reverting to Previous Kernel
How can I revert to my previous kernel 5.15.85-1-pve if I need to?

What I have tried reading so far

I would like to understand managing the host system kernel rather than throw commands at the command prompt. Hope someone can explain.

Thank you.
Thanks I did get some ideas from that thread, but a lot I still don't understand. Particularly when does one install pve-headers, since I don't think my initial proxmox install has them for kernel 5.15.


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