Proxmox

NUC random crash when screen is unplugged

I run an Intel NUC Gen 8 boxes (NUC8BEB, NVMe + HDD, 32 GB RAM) in my Proxmox 8 cluster (Issue is the same on PVE9).
I randomly hangs — sometimes in 15 min, sometimes after a few hours. No ping, no display, useless logs.

Root Cause

It’s likely an iGPU power management bug (Intel HD Graphics, Kaby Lake Refresh).
A random facebook post mentionned i915.enable_dc=0 disables GPU power management and should stops random hangs. I double checked and tested….

Fix

Persistent fix via GRUB:

nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet i915.enable_dc=0"
update-grub
reboot

Or quick test (but it’ll come back with kernel updates):

mv /lib/firmware/i915/kbl_dmc_ver1_04.bin \
   /lib/firmware/i915/kbl_dmc_ver1_04.disabled

Follow-up to my e1000e NIC hang post

Proxmox: Losing network with Intel I-219v

Recently migrated my homelab ESXi to Proxmox VE, and while things mostly went smoothly, one node would randomly hang (mostly during large transfers or under sustained network load but sometimes when idling…).
I plugged in a monitor to check logs and… confirmed the cause with a quick dmesg:

e1000e: Detected Hardware Unit Hang 

Turns out this has been a known issue for years with Intel e1000e NICs (like I217-LM, I219-V, 82574L, etc.). These “aging” chips choke when offload features are enabled under modern workloads.