[SOLVED] PVE 8.0 Kernel crashes on Hetzner server


Well-Known Member
Hi everyone,

I just ordered a new AX41 server at Hetzner and tried to install PVE 8.0.
Base is Debian 12 Bookworm, I use the installation from https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_12_Bookworm. At least I try to...

pve-kernel-6.2 hangs on boot. I gave pve-kernel-6.1 a try, the same.

I analysed kernel boot messages and compared it with the messages from Debian kernel 6.1.0-9-amd64 which is the default after installation. From pve-kernel I see the following message (last message):
Jun 27 10:23:56 pve kernel: divide error: 0000 [#1] PREEMPT SMP NOPTI
Jun 27 10:23:56 pve kernel: CPU: 11 PID: 414 Comm: (udev-worker) Not tainted 6.2.16-3-pve #1
Jun 27 10:23:56 pve kernel: Hardware name: Hetzner /B450 Pro4 R2.0, BIOS H8.02C 05/15/2023
Jun 27 10:23:56 pve kernel: RIP: 0010:nvGetClocks+0x1bd/0x300 [nvidiafb]
Jun 27 10:23:56 pve kernel: Code: 0f 84 a6 00 00 00 3d 30 03 00 00 0f 84 9b 00 00 00 8b 8a 04 05 00 00 0f b6 c5 31 d2 41 0f af c1 44 0f b6 c9 c1 e9 10 83 e1 0f <41> f7 f1 d3 e8 41 89 00 48 8b 87 88 11 00 00 8b 88 00 05 00 00 0f
Followed by a stack trace.

Do you have any hints, what's going on?
Are there workarounds like disabling same hardware/drivers?
Might this issue be triggered by a BIOS bug?

Does anybody run PVE 8.0 successfully on Hetzner AX41?

Thanks for your help.
Did you block the nvidia driver as I indicated in my post? It's necessary.
The other way is to ignore the Proxmox Kernel and go with Debian Kernel.

My config as documented in my own wiki:
echo blacklist nouveau > /etc/modprobe.d/blacklist-nvidia-nouveau.conf echo options nouveau modeset=0 >> /etc/modprobe.d/blacklist-nvidia-nouveau.conf echo blacklist nvidiafb > /etc/modprobe.d/blacklist-nvidiafb.conf # update initramfs (use correct kernel version) update-initramfs -u -k 6.2.16-3-pve
First, I followed the Proxmox Wiki instructions:
echo "deb [arch=amd64] http://download.proxmox.com/debian/pve bullseye pve-no-subscription" > /etc/apt/sources.list.d/pve-install-repo.list
wget https://enterprise.proxmox.com/debian/proxmox-release-bullseye.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg
apt update && apt full-upgrade
apt install pve-kernel-5.15
Then, I followed the instructions from the blog post:
sudo bash -c "echo blacklist nouveau > /etc/modprobe.d/blacklist-nvidia-nouveau.conf"
sudo bash -c "echo options nouveau modeset=0 >> /etc/modprobe.d/blacklist-nvidia-nouveau.conf"

cat /etc/modprobe.d/blacklist-nvidia-nouveau.conf
blacklist nouveau
options nouveau modeset=0

sudo update-initramfs -u
(Before installing pve-kernel-5.15 I did a reboot, which worked fine.)


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