The default session might be found in `extraSessionFilePackages`, but it's not
viable to detect at evaluation time, so emit a warning.
In LightDM instead of checking `defaultSessionName` against
`displayManager.session.names` we rely on the assertions in
`desktopManager` and `windowMananger` and just check that there's at least one
default set. The second assertion could never actually be triggered.
The original idea behind this change (described in ticket #11064) was to
improve the assertions to avoid that users of the X server accidentally
forget to configure a DM or WM.
However this caused several issues with setups that require X, but no DM
or WM. The keymap testcases became instable as well as now disabling DMs
needs to be done explicitly.
(see https://github.com/NixOS/nixpkgs/pull/31268#issuecomment-347080036)
In the end the idea behind the change and #11064 was obviously a
mistake, so reverting it completely for now should be fine.
(originally from f9415cb621)
feh is used to set background image for desktop managers that do not
support it directly, however there is no need to include it in PATH.
Fixes#17450.
This reverts commit 93c54acf97.
This reopens#30517 @nbp @Ma27
Breaking people's config for this is hardly reasonable as is. If it
absolutely cannot be avoided, at the very least, we need to provide
clear instructions on what people need to upgrade in their config. I
actually had to bisect to the commit, to even find out what property I
should change or define, as the error message was useless. It didn't
even mention a property name.
Discussion on the PR seems to be ongoing, so I'm reverting this, so we
don't break people's systems on unstable.
Use a solid black background when no background image (via
~/.background-image) is provided. In my case this fixes the really
strange behaviour when i3 without a desktop manager starts with the SDDM
login screen as background image.
Before the error if the wrong default desktop was chosen would be:
/nixpkgs-channels/lib/modules.nix:282:11:
Default desktop manager ($(defaultDM)) not found.
which has the string interpolation done incorreclty. Now that is fixed
and it is more user-friendly as:
/nixpkgs-channels/lib/modules.nix:282:11:
Default desktop manager (gnome) not found.
Probably you want to change
services.xserver.desktopManager.default = "gnome";
to one of
services.xserver.desktopManager.default = "gnome3";
services.xserver.desktopManager.default = "none";
This is due to breaking evaluation; see the PR discussion.
This reverts commit 6a77d5fd3e, reversing
changes made to 07a09fbe63.
Conflicts:
nixos/modules/services/x11/desktop-managers/default.nix
Hydra: ?compare=1138350
Conflicts:
nixos/modules/services/x11/desktop-managers/default.nix
Two imports were added independently on the same line.
I split it as well, as it was very long now.
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
Currently very basic gnome-shell launches on my laptop. Quite some
services won't start yet, most notable is gnome-control-center.
GTK3 apps still don't have theming applied and for example launching
chromium results in horrible red windows.
Gnome doesn't work at least since I started using NixOS half a year
ago, let's not give wrong impressions to newcomers. Packaging gnome3
is still something on horizon.
