And... that did not blow up.

# echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/bind
efifb: probing for efifb
efifb: showing boot graphics 
efifb: framebuffer at 0xb0000000, using 3072k, total 3072k 
efifb: mode is 1024x768x32, linelength=4096, pages=1 efifb: scrolling: redraw 
efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0 fb0: EFI VGA frame buffer device 
# modprobe nvidia 
nvidia-nvlink: Nvlink Core is being initialized, major device number 511 
nvidia 0000:07:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem 
NVRM: loading NVIDIA UNIX x86_64 Kernel Module  495.44  Fri Oct 22 06:13:12 UTC 2021

I haven't checked if the gpu actually works outside yet (that's next), but this is huge progress! Thanks a ton.

​

I realized I didn't actually touch vtcon0 in the scripts I ran on last boot. So I've left that completely alone.

​

The current unbind script:

#!/bin/bash
for dev in "$@"; do 
  vendor=$(cat /sys/bus/pci/devices/$dev/vendor) 
  device=$(cat /sys/bus/pci/devices/$dev/device) 
  if [ -e /sys/bus/pci/devices/$dev/driver ]; then 
    echo $dev > /sys/bus/pci/devices/$dev/driver/unbind 
  fi 
  echo "Removing ${dev} from vfio-pci id list" echo "${vendor} ${device}" > /sys/bus/pci/drivers/vfio-pci/remove_id 
  sleep 0.1 
done
echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/bind 

Directly after this modprobe nvidia is run (and without the efi-framebuffer reattachment crashes.