Proxmox hangs - needs hard reboot

I’ve been having a few issues with my Proxmox server since I built it a few weeks ago. Initially, it was one of my NICs dying, and now I seem to have the server hanging after a day or two running flawlessly.

It just seems to… stop. I’ve had a look through /var/log/kern.log (and kern.log.1) and I can’t find any information as to why it might be crashing. Everything seems fine, then next minute it shows the startup logs from when I reboot it.

Where else can I look to get more insight into what’s going on?

I have no idea if it’s a hardware issue (it shouldn’t be - new PC and I did some preliminary testing beforehand) or if its a config issue that I manage to break at some point or if there’s a bug or what.

Still getting to grips with Linux so expect some stupidity.

Edit: forgot to mention the one error I am getting regularly but it doesn’t seem to be related to the crash.
Looks like this:
Aug 14 14:09:34 proxmox kernel: [ 7780.155071] kvm_msr_ignored_check: 35 callbacks suppressed
Aug 14 14:09:34 proxmox kernel: [ 7780.155073] kvm [26799]: ignored rdmsr: 0x1c9 data 0x0
Aug 14 14:09:34 proxmox kernel: [ 7780.155197] kvm [26799]: ignored wrmsr: 0x1c9 data 0x3
Aug 14 14:09:34 proxmox kernel: [ 7780.155318] kvm [26799]: ignored rdmsr: 0x1c9 data 0x0
Aug 14 14:09:34 proxmox kernel: [ 7780.155437] kvm [26799]: ignored rdmsr: 0x1a6 data 0x0
Aug 14 14:09:34 proxmox kernel: [ 7780.155556] kvm [26799]: ignored wrmsr: 0x1a6 data 0x11
Aug 14 14:09:34 proxmox kernel: [ 7780.155675] kvm [26799]: ignored rdmsr: 0x1a6 data 0x0
Aug 14 14:09:34 proxmox kernel: [ 7780.155793] kvm [26799]: ignored rdmsr: 0x1a7 data 0x0
Aug 14 14:09:34 proxmox kernel: [ 7780.155912] kvm [26799]: ignored wrmsr: 0x1a7 data 0x11
Aug 14 14:09:34 proxmox kernel: [ 7780.156029] kvm [26799]: ignored rdmsr: 0x1a7 data 0x0
Aug 14 14:09:34 proxmox kernel: [ 7780.156146] kvm [26799]: ignored rdmsr: 0x3f6 data 0x0

To suppress the “ignored rdmsr” and “ignored wrmsr” outputting to logs, add “options kvm report_ignored_msrs=0” to your kvm configuration at /etc/modprobe.d/kvm.conf

Okay, but what are they?