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Override leftover SDDM drop-ins so the greeter cannot land on a black screen

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SirBlob
2026-09-20 07:06:23 -04:00
parent 8f124f47c2
commit 421c58fab0
8 changed files with 103 additions and 22 deletions
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docs/install.md
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@@ -43,14 +43,33 @@ with `--check`.
| File | Why |
| --- | --- |
| `/usr/local/share/wayland-sessions/blob.desktop` | the session SDDM offers |
| `/etc/sddm.conf.d/10-blob.conf` | Wayland greeter, run on Hyprland, remember the last session |
| `/etc/sddm/hyprland-greeter.lua` | the greeter's own tiny Hyprland config |
| `/etc/sddm.conf.d/zz-blob.conf` | Wayland greeter, run on Hyprland, stock theme, remember the last session |
| `/etc/sddm/hyprland-greeter.conf` | the greeter's own tiny Hyprland config |
The greeter config matters more than it looks: SDDM's stock Wayland greeter
runs on `weston`, which Blob does not install, so a default SDDM would fail
to draw anything. `sddm.service` is enabled and the default systemd target is
set to `graphical.target`, which an Arch install without a display manager
does not have.
The `zz-` prefix is load-bearing. SDDM reads `/etc/sddm.conf.d` in
alphabetical order and the last file wins, so a leftover `10-wayland.conf`,
`10-theme.conf` or `autologin.conf` from another desktop would otherwise
override Blob's. For the same reason `zz-blob.conf` blanks `Theme` and
`Autologin`: a greeter pointed at an uninstalled theme, or an autologin
pointed at a session entry that no longer exists, leaves SDDM on a black
screen it never falls back from, and the only way in is a TTY.
The Omarchy ISO wrote exactly such an autologin, owned by no package, so it
outlives Omarchy. The installer reports it and overrides it; deleting it stops
the warning:
```bash
sudo rm /etc/sddm.conf.d/autologin.conf
```
`--autologin` writes `zzz-blob-autologin.conf`, the only file that sorts after
`zz-blob.conf`.
9. **Launch.** When the installer was run from a console and nothing graphical
is running, it starts `sddm.service` so the desktop appears without a reboot.
`--no-launch` prints the command instead. `--autologin` writes