Proxmox PVE Kernel Header Install

[DrEVILish]

If on the latest PVE 9.1 Debian 13 build, you might also need to check:
modinfo i915 | grep -E 'filename|version|srcversion'
Expected:
• filename should point into /lib/modules/$(uname -r)/updates/dkms/i915.ko
• NOT /kernel/drivers/gpu/drm/i915/i915.ko
If it failed the first time and you're still running from the /kernel/drivers... version, do the following

Install latest proxmox headers
apt install proxmox-default-headers
Reinstall the dkms
dkms autoinstall
Update the boot
update-initramfs -u -k all
If you're NOT using grub run.
proxmox-boot-tool refresh

reboot

check modinfo again as above, you can do a similar method if you're using the xe version instead of the i915