Fix Proxmox Crashing on J1900 and J3455 CPUs

Sometimes kvm has trouble running on some cpus.  Unfortunately you end up finding this out the hard way when proxmox crashes and / or shuts down.  As it turns out its our friend cpu c states.

The solution to the problem is limiting the c states to C1. We will do this by telling the linux kernel the maximum c state to use.

Edit /etc/default/grub and add the following line.

GRUB_CMDLINE_LINUX_DEFAULT="intel_idle.max_cstate=1 processor.max_cstate=1"

Next update grub.
> update-grub

Now reboot the system.
> reboot

Your system should now be crash free.

 

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