blueman-applet: exception on startup

[dermetfan]

❯ systemctl --user start blueman-applet

I have not yet found any functionality that actually does not work after clicking OK though.

[rycee]

I'm not using Bluetooth but this seems to me like an issue that has to be resolved outside Home Manager. Basically, from what I can see the org.blueman.Mechanism D-Bus service is provided by the blueman package in Nixpkgs:

rycee@beta:~/devel/nixpkgs$ nix-build -A blueman
/nix/store/8abl7bvx83g7ql4ri8qzkyjs3fyp3nss-blueman-2.0.4
rycee@beta:~/devel/nixpkgs$ cat result/share/dbus-1/system-service/org.blueman.Mechanism.service
[D-BUS Service]
Name=org.blueman.Mechanism
Exec=/nix/store/8abl7bvx83g7ql4ri8qzkyjs3fyp3nss-blueman-2.0.4/libexec/blueman-mechanism
User=root
rycee@beta:~/devel/nixpkgs$

The issue seems to be that this is a system service so it can't set it up for a single user. Ideally, I guess there should be a NixOS module for blueman (e.g., services.blueman.enable = true) but you could try installing blueman using environment.systemPackages in your system configuration. If it is installed system wide I suspect that the system dbus daemon will be able to find it…

[uvNikita]

@rycee is right, the problem seems to be connected that dbus can't find the blueman package.
To make it work I've added blueman to services.dbus.packages in my system configuration file:

services.dbus.packages = with pkgs; [ blueman ];

[dermetfan]

That solved the issue and I learned something about D-Bus. Thanks!

[CMCDragonkai]

Do you need both environment.systemPackages and services.dbus.packages at the same time specifying blueman?

[uvNikita]

@CMCDragonkai it should be enough with only services.dbus.packages = [ pkgs.blueman ]; set.