Fix to free screen (via sudo):
#!/bin/bash
echo 0 > /sys/class/vtconsole/vtcon0/bind
echo 0 > /sys/class/vtconsole/vtcon1/bind
echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/unbind
- EFI: disable secure boot
- make sure AppArmor is not prohibiting file access to dirs necessary for saving nvram