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Single-script builder (nosignal.sh) that turns a stock Arch Linux ISO into a fully-offline installer for a themed Hyprland + caelestia (Quickshell) desktop: matching SDDM greeter, Btrfs/Limine bootable snapshots, chwd-style GPU detection, and a curated "os updates" layer (keybind cheatsheet, settings panels, system polish, on-box management skill). See README.md. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
63 lines
3.2 KiB
Markdown
Executable file
63 lines
3.2 KiB
Markdown
Executable file
# display-manager-sddm — switch greetd → SDDM (for DeckShift gaming mode)
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DeckShift's desktop↔gaming-mode switching is built on **SDDM**: `switch-to-gaming`
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rewrites SDDM's config to point at the Gamescope/Steam session and restarts SDDM
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to auto-log into it (and back). NoSignal ships **greetd + tuigreet**, which has no
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equivalent, so this change replaces the display manager with SDDM.
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## What it does
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- Installs `sddm` (+ `xorg-server` for the reliable X11 greeter — the Hyprland
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**session** stays Wayland; only SDDM's greeter uses X).
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- Installs `/etc/sddm.conf.d/10-nosignal.conf` (X11 greeter, Numlock on, notes on
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the preferred session).
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- Disables `greetd.service`, enables `sddm.service`. **Takes effect on reboot.**
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## Critical: preserve the uwsm session
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greetd launched Hyprland via uwsm:
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`uwsm start -e -D Hyprland hyprland.desktop`. The matching session entry is
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**`/usr/share/wayland-sessions/hyprland-uwsm.desktop`** ("Hyprland
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(uwsm-managed)"). Under SDDM, pick **that** session, not plain
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`hyprland.desktop` (which runs `start-hyprland` directly and loses the
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uwsm/systemd-managed session caelestia relies on). SDDM remembers the last
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session per user.
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## Install (live)
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```sh
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sh install-display-manager-sddm.sh # sudo; reboot afterwards
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```
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To revert: `sudo systemctl disable sddm; sudo systemctl enable greetd`.
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## Builder notes — display-manager swap (package + service delta)
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This is **not** a no-delta change. For the ISO:
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- **Packages:** add `sddm` (+ `xorg-server` if using the X11 greeter, OR `weston`
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if using the Wayland greeter — pick one). Remove `greetd`, `greetd-tuigreet`,
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`greetd-agreety` from the image package list (or keep as fallback).
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- **Services:** enable `sddm.service` instead of `greetd.service` in the image.
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- **Greeter display server (decision):**
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- *X11 greeter* (this component's default): most reliable, but adds
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`xorg-server` to an otherwise Wayland-only image.
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- *Wayland greeter*: keeps the image X-free — set `DisplayServer=wayland` +
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`[Wayland] CompositorCommand=weston --shell=kiosk` and add `weston`.
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- **Session default:** ensure `hyprland-uwsm.desktop` is the preferred desktop
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session (uwsm launch — matches the old greetd `--cmd`). Don't let plain
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`hyprland.desktop` win.
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- **Login behaviour:** greetd here did **not** autologin (tuigreet prompts).
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SDDM keeps a password prompt unless `[Autologin]` is set. DeckShift configures
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its own autologin/session entries on top — let it.
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- **DeckShift autologin (interaction to know about):** DeckShift writes
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`/etc/sddm.conf.d/zz-gaming-session.conf` with `[Autologin] User=… /
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Session=hyprland-uwsm / Relogin=true`. Once DeckShift runs, this **overrides
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the password prompt** — the box boots straight into the desktop, and the
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desktop↔gaming switch flips `Session=` then restarts SDDM (autologin, no
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greeter). That's the intended Steam-Deck-style behaviour. If the ISO wants a
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password on normal boots, ship a higher-priority SDDM drop-in or adjust
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DeckShift's `gaming-session-switch` to only autologin while in gaming mode.
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- Pairs with gaming-enablement (multilib + omarchy-pkg-add). Together
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these two make NoSignal DeckShift/Steam-Deck capable.
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- The base's plymouth/limine boot splash is unaffected.
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