Ubuntu 20.04.04 machine freezes

[sam007]

If you have the same issue as @IlyaK (or another issue introduced with 5.4.0-122-generic) it should help:

issues occured again tonight after downgrade to 5.4.0-121-generic
but the system seems didn't freeze totally and the cpu Utilization also didn't reach to 100%
network connection didn't work

 

[AxisNL]

I’m running a Xeon e3 1260v3, so I doubt the cpu is the common denominator here.

 

[Ahmet Bas]

We are also seeing that hot migration from server with kernel 5.15.39-1-pve stops working once it's migrated to the other hypervisor. Migrating from server with new kernels we do not see the same behavior.

 

[tibbe]

Same problem here. Also N5105

 

[pamii]

I have a problem when installing ubuntu server there is a crash "generating crash report" even though I installed it by default

 

[JohnBee]

I just installed Promox and created my first VM(Ubuntu Server), and found the same issue, freezing without any way to restore the VM.

 

[JohnBee]

I just installed Promox and created my first VM(Ubuntu Server), and found the same issue, freezing without any way to restore the VM.

Just wanted to update and say that I resolved my issue by turning-off all power saving features, including c-states - hasn't happened since

 

[Charry2014]

I am having exactly the same issues - host CPU is a Celeron J6412 (Protectli VP2420), the Proxmox 8.0.3 host is running 2 VMs and is lightly loaded. This is my first Proxmox host, moving away from ESXi, so the setup is fairly vanilla.

The first VM, pfSense firewall, runs perfectly with no issues whatsoever. The Ubuntu 22.04.3 VM crashes sporadically, generally through the night it seems and when it has crashed the memory is always maxed out and one CPU is running 100%. As a test I increased the guest RAM from 8GB to 16GB and the crashes happen less frequently but still do happen.

@JohnBee Where did you disable power savings? In the Ubuntu guest or in Proxmox host? Any clues to what you did gratefully received.

 

[gyrex]

I am having exactly the same issues - host CPU is a Celeron J6412 (Protectli VP2420), the Proxmox 8.0.3 host is running 2 VMs and is lightly loaded. This is my first Proxmox host, moving away from ESXi, so the setup is fairly vanilla.

The first VM, pfSense firewall, runs perfectly with no issues whatsoever. The Ubuntu 22.04.3 VM crashes sporadically, generally through the night it seems and when it has crashed the memory is always maxed out and one CPU is running 100%. As a test I increased the guest RAM from 8GB to 16GB and the crashes happen less frequently but still do happen.

@JohnBee Where did you disable power savings? In the Ubuntu guest or in Proxmox host? Any clues to what you did gratefully received.

Have you tried installing the latest Intel microcode? The freezing issue is a known one that is nearly always resolved by updating the microcode. If you search these forums, there's plenty of guides on how to do it and why it's required.

 

[Charry2014]

Thank you for the hint. My searches took me here and I updated the Debian Firmware Repository and ran

apt install intel-microcode

but I get the same results -

# grep microcode /proc/cpuinfo | uniq
microcode    : 0x1
# dmesg | grep microcode
[    0.295779] MDS: Vulnerable: Clear CPU buffers attempted, no microcode

Did I miss something here? The output from apt showed the latest microcode version that Ubuntu lists, is it necessary to go to the latest 'unstable' version? I ran this on the guest VM but should this be updating the microcode on the Proxmox host? Apologies for the beginner questions

Running

apt dist-upgrade

did give lots of updates mentioning firmware so perhaps that will help. I did this to the host too.

 

[gyrex]

You'll need to add the non-free-firmware repositories to /etc/apt/sources.list

# Include Intel microcode firmware
deb http://ftp.debian.org/debian bookworm main contrib non-free-firmware
deb http://ftp.debian.org/debian bookworm-updates main contrib non-free-firmware

Then run:

sudo apt update && sudo apt install intel-microcode