Quattro upgrade Blockers for those who start before v2.0.0

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I find out (with Fable help) that there is a lot of blockers that prevents the upgrade from 3.8.5 (or 3.latest) to Quattro.
In my case most of it was because I use archinstall to install Omarchy v1.6.x (if I recall correctly) which was before a real ISO v2.0.0.

The problem is that v2.0.0 did a lot of defaults that did not got back to the existent users at time.
As this is the case to all my Omarchy boxes, I will listing each one and in the replies the actions I took to solve it. As I have seem here and in Discord, there are many people in this situation.
Some are not really blockers, but missing settings / configs and easy wins:

1 - Firewall
2 - Snapper
2.1 - Snapper on Grub
3 - Input group
4 - Missing packages

(to be continued)

[rsd]

FIREWALL

just run:
bash ~/.local/share/omarchy/install/first-run/firewall.sh

You probably will want to open some ports later with ufw like:
sudo ufw limit 22/tcp comment 'SSH'

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SNAPPER

The decision from Omarchy on v2.0.0 is to never touches disk layout, bootloader, etc. Which is a good policy.

(This assume a brtfs installation)

1. Install

sudo pacman -S snapper

2. Free the path for snapper

sudo umount /.snapshots
sudo rmdir /.snapshots

3. Create the config (also creates an unwanted nested .snapshots subvolume)

sudo snapper -c root create-config /

4. Replace snapper's subvolume with your existing @snapshots

sudo btrfs subvolume delete /.snapshots
sudo mkdir /.snapshots
sudo mount /.snapshots
sudo chmod 750 /.snapshots

5. Apply Omarchy's official policy (root-only, keep 5, no timeline spam)

sudo tee /etc/snapper/configs/root >/dev/null <<'EOF'
# Omarchy snapshots root only for pre-update recovery — kept to 5, no timeline
SUBVOLUME="/"
FSTYPE="btrfs"
NUMBER_CLEANUP="yes"
NUMBER_MIN_AGE="0"
NUMBER_LIMIT="5"
NUMBER_LIMIT_IMPORTANT="5"
TIMELINE_CREATE="no"
EOF

6. Timers: no hourly timeline snapshots, yes cleanup of old ones

sudo systemctl disable --now snapper-timeline.timer
sudo systemctl enable --now snapper-cleanup.timer

7. First snapshot — your pre-Quattro baseline

sudo snapper -c root create --description "pre-quattro baseline"
sudo snapper -c root list

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SNAPPER ON GRUB

Limine has been set the default bootloader on v2.0.0, however, Grub still capable of handling snapper's restore menu:

1 - Installation

sudo pacman -S grub-btrfs inotify-tools

2 - Overlay hooks:

# confirm you dont have it already
grep ^HOOKS /etc/mkinitcpio.conf 

# added unless you have
sudo sed -i 's/^HOOKS=(\(.*\))$/HOOKS=(\1 grub-btrfs-overlayfs)/' /etc/mkinitcpio.conf
sudo mkinitcpio -P

3 - Watcher for new snapshots:

sudo systemctl enable --now grub-btrfsd.service

4 - Generate the snapshot submenu:

sudo grub-mkconfig -o /boot/grub/grub.cfg

5 - Testing if needed:

# add a snapshot:
sudo snapper -c root create --description "Snapshot test"

# list snapshots
sudo snapper -c root list

# delete a snapshot:
sudo snapper -c root delete <N>

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INPUT Group

Introduced in v3.3.0, commit a41cb03, 2026-01-05 — "always add user to input group to prevent restarts needed for dictation or xbox controllers.", but never added in a migration.

 sudo usermod -aG input <your username> 

[rsd]

Missing Packages

Installable with sudo pacman -S <package>

• dust
  added on v2.0.0

• wireless-regdb
  added on v2.1.1

• alsa-utils
  added on v3.4.0

• claude-code
  v3.[45].0, probably added from the Omarchy menu as well.