Colourful Norwich skyline illustration

Michael Sage

IT, Digital & Culture

Intel 5xxx and Proxmox

Just a quick one today. I started playing with Proxmox on a Beelink U59 Pro, there were some VM instabilities and it turns out I wasn’t alone.

Proxmox Forum:

Uh oh! I thought I would be stuck turning this into a Win Mini PC, however, it turns out there are some CPU issues with the Intel 5xxx processors, here. 

I had a look through the forums and it looks like it is an issue with Kernel 5.15. Proxmox have issued a 5.19 kernel which appears to resolve the issue, this has since be superseded with a 6.1 Kernel.

Forum post here.

It’s easy to install though

apt update
apt install pve-kernel-6.1


Update – 27/02/2023

Turns out there is slightly more to the issue than a kernel patch.

You need to patch the microcode for the processor.

Add the following to /etc/default/grub (GRUB_CMDLINE_LINUX_DEFAULT)  intel_idle.max_cstate=1 processor.max_cstate=1

Update Grub (update-grub)

Update Intel-Microcode 
edit /etc/apt/sources.list add non-free to

deb bullseye main contrib non-free
deb bullseye-updates main contrib non-free
deb bullseye-security main contrib non-free

update by
apt update
apt install intel-microcode