EndeavourOS EFI Boot – Auto Modal

Firmware initializes hardware and hands off execution to an EFI application.

UEFI initializes CPU, memory, chipset, and devices
Reads EFI NVRAM boot entries
Selects a boot entry pointing to an EFI executable
Loads the executable from the EFI System Partition (ESP)

/EFI/EndeavourOS/grubx64.efi
/EFI/Boot/bootx64.efi

GRUB presents kernel choices and prepares the Linux environment.

GRUB EFI binary executes
Reads /boot/grub/grub.cfg
Displays boot menu or auto-selects default
Loads kernel and initramfs into memory
Passes kernel command-line parameters

Early userspace prepares the real root filesystem.

/boot/vmlinuz-linux
/boot/initramfs-linux.img

Kernel decompresses and starts execution
Mounts initramfs as temporary root
Loads storage, filesystem, GPU drivers
Unlocks encrypted root if configured
Switches to real root filesystem

systemd orchestrates services and targets.

systemd starts as PID 1
Mounts remaining filesystems
Starts udev, networking, and core services
Executes units in parallel
Transitions to graphical target

Final transition from system services to user desktop.

Display manager (SDDM) starts
Wayland or Xorg launches
User authentication occurs
Desktop environment session starts

ls /sys/firmware/efi
efibootmgr -v
mount | grep efi