https://www.reddit.com/r/Ubuntu/comments/v0ff1r/ubuntu_2204_server_wont_boot_without_hdmi_plugged/
sudo vi /etc/default/grub ## GRUB_CMDLINE_LINUX_DEFAULT="quiet nomodeset" ## GRUB_TERMINAL=console
sudo update-grub
## Configuration File sudo find /boot -name "grub.cfg"
## List Menu cat /boot/grub/grub.cfg | grep 'menuentry ' | cut -f 2 -d "'" | nl -v 0
0 Ubuntu 1 Ubuntu, with Linux 5.15.0-1035-gcp 2 Ubuntu, with Linux 5.15.0-1035-gcp (recovery mode) 3 Ubuntu, with Linux 5.13.0-48-generic 4 Ubuntu, with Linux 5.13.0-48-generic (recovery mode) 5 UEFI Firmware Settings
sudo grub-reboot 3 #sudo grub-set-default 3
sudo reboot
sudo vi /etc/default/grub
#GRUB_DEFAULT=0 GRUB_DEFAULT=3
sudo update-grub