Connman module does not work

[AndersonTorres]

Describe the bug

When setting services.connman.enable = true;, it is impossible to use connmanctl to connect to a wifi network. (Didn't try wired.)

Steps To Reproduce

1. setting configuration.nix:

  services.connman = {
    enable = true;
    enableVPN = false;
    package = pkgs.connmanFull;
    wifi.backend = "wpa_supplicant";
  };

2. run nixos-rebuild boot --flake ...
3. reboot
4. connmanctl scan wifi

The last command says Error /net/connman/technology/wifi: Not supported.

And it becomes impossible to connect without rollback to my old networkmanager configuration.

Expected behavior

The commands should list and recognize wifi networks.

Screenshots

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Additional context

Add any other context about the problem here.

Notify maintainers

@matejc

Metadata

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 5.15.76, NixOS, 22.11 (Raccoon)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.11.0`
 - channels(root): `"nixos-21.03pre243434.e0759a49733, nixos-20.03-20.03.2964.252bfe01075, nixos-unstable-21.03pre243434.e0759a49733"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[AndersonTorres]

I have installed a new machine, and in it I can't use connman too.

[kwshi]

Just wanted to see if you're experiencing the same issue as me-- could you try a few commands?

• Run nixos-rebuild switch instead of nixos-rebuild boot, and see if a systemd error message about wpa_supplicant.service pops up.
• systemctl status '*wpa_supplicant*', see if there's an error message, and if so, what is it?
• Does running sudo touch /etc/wpa_supplicant.conf and then nixos-rebuild switch fix the issue for you?

[AndersonTorres]

Remember me tomorrow. I am organizing some repos.

[AndersonTorres]

@kwshi apologies in advance, but I tried and now it is working!

1. No error message about wpa_supplicant;
2. Nothing on the systemd log worth of notice.
3. Error /net/connman/technology/wifi: Not supported.
4. Touching and rebooting worked!

[AndersonTorres]

For the record, tonight I will try this in my main machine.

[AndersonTorres]

I have tried this on my local machine, and the result is: it only works when creating the dummy file:

https://github.com/atorres1985-junkyard/etc/blob/trunk/nixos-config/hendrix/default.nix#L258