When session debugging was enabled in GNOME but not in Pantheon
{
services.xserver = {
desktopManager.pantheon = {
enable = true;
};
desktopManager.gnome3 = {
enable = true;
debug = true;
};
};
}
it caused a conflict:
error: The option `environment.sessionVariables.GNOME_SESSION_DEBUG' has conflicting definitions, in `<nixpkgs/nixos/modules/services/x11/desktop-managers/pantheon.nix>' and `<nixpkgs/nixos/modules/services/x11/desktop-managers/gnome3.nix>'.
Unfortunately, you can't configure the default user-session
with GDM like lightdm. I've opened a feature request [0]
but I'd like to be able to do this now.
We use a GObject Python script using bindings to AccountsService
to achieve this. I'm hoping the reliable heuristic for session names
is the file's basename. We also have some special logic for which
method to use to set the default session. It seems set_x_session is
deprecated, and thusly the XSession key, but if that method isn't used
when it's an xsession it won't be the default in GDM.
[0]: https://gitlab.gnome.org/GNOME/gdm/issues/535
The SLIM project is abandoned and their last release was in 2013.
Because of this it poses a security risk to systems, no one is working
on it or picked up maintenance. It also lacks compatibility with systemd
and logind sessions. For users, there liikely isn't anything like slim
that's as lightweight in terms of dependencies.
When we did the revert of adding gnome-flashback to systemd.packages [0]
I forgot to test with other display managers. If we use GDM with gnome-flashback
it appears it doesn't try to fallback to non-systemd startup and always fails and
starts the regular gnome-session. So adding gnome-flashback to systemd.packages
was perfectly fine, but we did forgot one detail. We need systemd targets for the
customSessions which is added using mkSystemdTargetForWm in the gnome-
flashback package.
[0]: 42f567b30d
Instead of assign the libinput options to touchpad devices only, it
should be appied by any device using libinput.
Due to the fact that `40-libinput.conf` already defines libinput as
driver for any detected input device, we can use `MatchDriver` to appy
options.
I've noticed a similar issue in Pantheon, without this
sound theme installed there's no system sounds.
I believe it's because the gnome theme and the pantheon
theme inherit this one.
This reverts commit 60aedadc59.
Using tests from #71212 I am now unable to reproduce there being issues
with starting the default metacity flashback session without this.
We create a wrapper which launches gnome-shell with the correct environment and
cap_sys_nice.
We can then override gnome-shell-wayland.service to use this wrapper.
NOTE: We need to force clear the environment, because the defaults aren't good
for user services. That should probably be fixed.
This session would fail to start because we didn't have it in systemd.packages
(as we've switched to systemd gnome-session).
Haven't tested custom sessions.
Having `display-manager` conflict with `plymouth-quit` causes this lock up:
- `plymouth-quit-wait` starts up, waiting for plymouth-quit to run
- `lightdm` starts up
- `plymouth-quit` can't start, it conflicts with lightdm
- `plymouth-quit-wait` keeps waiting on plymouth-quit to kill plymouthd
The idea is having LightDM control when plymouth quits, but communication with
plymouth was broken: https://github.com/NixOS/nixpkgs/pull/71064
Unfortunately having the conflict breaks switching to configurations with
plymouth enabled. So we still need to remove the conflict.
fixes#71034
xfce4-volumed-pulse is not abandoned, but is superseded by a panel
plugin which is not available when not using the desktop.
Fixes: volume up/down keys support
These improvements come from shopping around
at what other downstreams have done with their
systemd units and recent changes like [0] to gdm.
Note there's no requries or after on dbus.socket because
settings BusName will set this up automaticallly and
give it a type of dbus.
[0]: 2d57f45962
