Omarchy Setup Dual boot and Auto-login (manual installation)

Overview

This guide walks through setting up Arch Linux manually with:

• No LUKS (to enable autologin)
• limine as the bootloader
• Larger /boot partition to accommodate multiple kernels
• Dual boot with Windows 11
• Omarchy desktop environment (curl -fsSL https://omarchy.org/install | bash)
• VFIO passthrough using AMD iGPU + NVIDIA RTX 4090
• Snapshots via BTRFS (optional)

Disk Layout (Manual Partitioning)

Use lsblk -f or this enhanced command for details:

lsblk -o NAME,SIZE,FSTYPE,LABEL,MOUNTPOINT,UUID,MODEL,PARTUUID
sudo blkid

Example Layout

Mounting Partitions

mount /dev/nvme0n1p2 /mnt
mkdir -p /mnt/boot
mount /dev/nvme0n1p1 /mnt/boot

Start archinstall

archinstall

Important Configs:

• Filesystem: btrfs or ext4
• Bootloader: None (we will use Limine)
• Profile: Minimal
• Hostname, root password, main user
• Enable: NetworkManager, PipeWire
• Disable: LUKS encryption
• Bootloader: Limine
• Optional Repositories: Multilib

Post-install

Install additional software:

sudo pacman -S base-devel git curl wget nano htop openssh pipewire pipewire-alsa pipewire-pulse pipewire-jack wireplumber

/boot/limine.conf

TIMEOUT=10
DEFAULT_ENTRY=3

/Windows 11
  protocol: efi
  path: boot):/EFI/Microsoft/Boot/bootmgfw.efi
  comment Boot into windows 11

/+Archito
  comment: Omarchy
  comment: machine-id=xxxx order priority=50
    //Linux
    comment: 6.17.3-arch2-1
    protocol: efi_chainload
    image_path: boot():/EFI/Linx/omarchy_linux.efiXXXX

    //Snapshots...




EOF

useful link: https://github.com/basecamp/omarchy/discussions/1604

Copy Windows Bootloader

Mount your Windows EFI partition:

##identify the right drive
lsblk -o NAME,SIZE,FSTYPE,LABEL,MOUNTPOINT,UUID,MODEL,PARTUUID
##create and mount
mkdir -p /mnt/windows_efi
sudo mount /dev/nvme2n1p1 /mnt/windows_efi

Copy contents:

sudo cp -r /mnt/windows_efi/EFI/Microsoft /boot/EFI/

Enable TTY Autologin ( also available on GUI w christitus tool)

mkdir -p /etc/systemd/system/getty@tty1.service.d/
cat <<EOF | sudo tee /etc/systemd/system/getty@tty1.service.d/override.conf
[Service]
ExecStart=
ExecStart=-/usr/bin/agetty --autologin yourusername --noclear %I $TERM
EOF

Optional: Chris Titus Arch Install Script

Chris Titus Tech provides a powerful CLI tool to speed up system setup:

sudo curl -fssl christitus.com/linux | sh

Install Omarchy

curl -fsSL https://omarchy.org/install | bash

⚠️ Requires: flatpak, git, wget, curl, base-devel, sudo, zsh, starship, xdg-user-dirs, hyprland, etc.

Final Checks

Reboot:

reboot

Limine will now show dual boot options for Arch and Windows.

Notes

• If you use btrfs, consider setting up Snapper or Timeshift
• limine doesn’t need ESP mounted at /boot/efi, it uses /boot
• This setup is ideal for VFIO: host uses AMD iGPU, guest uses NVIDIA passthrough