notify-osd cannot send message

[memberbetty]

Issue description

GLib-GIO-Message: 11:25:13.647: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications.

** (notify-osd:16786): WARNING **: 11:25:13.648: Another instance has already registered org.freedesktop.Notifications

** (notify-osd:16786): WARNING **: 11:25:13.648: Could not register instance

Steps to reproduce

Desktop environment plasma5.

notify-osd a # not a typo

Technical details

• system: "x86_64-linux"
• host os: Linux 4.14.98, NixOS, 18.09.git.168cbb3 (Jellyfish)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.1.3
• channels(root): "nixos-18.09.1571.7795a7ad5f0"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

[hedning]

Try notify-send from libnotify, I'm fairly certain notify-osd is a daemon which handles showing notifications (if I understood the question at least).

[jtojnar]

Yup. And I would guess that Plasma already has its own notification server that occupies the org.freedesktop.Notifications interface. You will need to find a way to disable Plasma’s notification server if you want to use notify-osd in its stead.

[jtojnar]

The first message is from no GSettings module being available, see #43150 for more information.

[memberbetty]

Is it possible that we get output like "Copy paste the following to configuration.nix on line X, column Y" in order to have a more helpful error message?

(This would apply to many packages and probably requires a lot of patching, so I know it's not "free").

[jtojnar]

Patching this should be enough and the issue can be fixed by adding programs.dconf.enable = true; to configuration.nix.

Fixing it will unlock this or this which requires much more involved fix – either adding wrapGAppsHook to dependencies of the application, or patching the schema path into the library causing the issue (necessary for plug-ins). We should probably first finish #43150 and link there from the messages once it is done.

[stale]

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