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Enabling dconf doesn't create /etc/dconf/db #85546

Open magnetophon opened 4 years ago

magnetophon commented 4 years ago

Describe the bug When I put dconf.enable = true; in my config, rebuild and reboot, dconf doesn't work: failed to commit changes to dconf: The connection is closed. When I run dconf update I get error: Error opening directory “/etc/dconf/db”: No such file or directory. The directory indeed doesn't exist. When I create it manually, (and run dconf update, not sure if that's needed), dconf works. I'm not running any desktopmanager, just i3.

To Reproduce Steps to reproduce the behavior:

  1. put dconf.enable = true; in your config
  2. rebuild
  3. reboot

Expected behavior Programs using dconf should be able to commit changes when you enable it.

Notify maintainers @hedning @jtojnar @worldofpeace

Metadata

hedning commented 4 years ago

Programs running as the main user will use a db in the home directory, not the system one (~/.config/dconf/user). Are you seeing a service fail to commit changes? In that case the service might need a dconf profile ala. ibus and gdm.

jtojnar commented 4 years ago

I find it curious that the system db is needed. Quoting from the dconf manual:

If the DCONF_PROFILE environment variable is unset and the "user" profile can not be opened, then the effect is as if the profile was specified by this file:

user-db:use

That is, the user's personal database is consulted and there are no system settings.

Though, I think running dconf update when /etc is built would be nice so we could create dconf databases using environment.etc until #54150 is implemented.

magnetophon commented 4 years ago

Are you seeing a service fail to commit changes?

I was trying to get https://github.com/NixOS/nixpkgs/pull/85553 to work.

In that case the service might need a dconf profile ala. ibus and gdm.

I found https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/i18n/input-method/ibus.nix#L67 and https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/x11/display-managers/gdm.nix#L248 but I'm not sure how to proceed.

@jtojnar idk, I'm totally new to dconf; just going by the error messages.

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