GRUB_DEVICE=LABEL=cloudimg-rootfs
GRUB_DISABLE_LINUX_UUID=true
GRUB_TIMEOUT=0
GRUB_TERMINAL="serial console"
GRUB_GFXPAYLOAD_LINUX=auto
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200 no_timer_check nofb nomodeset vga=normal"
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"