Il giorno mer 9 gen 2019 alle ore 23:33 Timothy Sample <samplet@ngyro.com>
ha scritto:

> Hi Ludo,
>
> Ludovic Courtès <ludo@gnu.org> writes:
>
> > Hello Timothy!
> >
> > Timothy Sample <samplet@ngyro.com> skribis:
> >
> >> It should be okay for testing as it is.  It will not work unless
> >> “gnome-desktop-service” is included in your services.  It does work with
> >> other window managers, but the session switching UI doesn’t seem to
> >> work.  With a bit of fiddling, I got it to start EXWM, but I suspect
> >> it’s only because “exdm” comes before “gnome” when sorted.  (For the
> >> record, I had to remove the “TryExec” key from its desktop entry file.)
> >
> > I tested in ‘guix system vm’ on ‘master’.  The welcome screen is fairly
> > gray (do you know how we can change the background image?);
>
> I’m not sure about this yet.  The manual says that the default “greeter”
> (UI for logging in) can be themed using “gnome-settings-daemon”.  I’d
> like something more fun, too, but it is low on the priorities list right
> now.  :)
>
> > it does show the list of users, specifically those that have a proper
> > password set:
> >
> >
> >
> > Logging into GNOME works and screen locking works as well.
>
> \o/
>
> > I didn’t find a way to select a session other than GNOME, though.
> > How’s that supposed to work?
>
> Like I said before, this is broken.  Looking at screenshots on the Web,
> there’s supposed to be a little gear icon that shows up beside the “Sign
> In” button.  We have a problem with GNOME right now where some buttons
> are invisible but still work (e.g., the calendar month changing
> buttons).  The session switching button is not just invisible, though.
> Clicking where it should be doesn’t do anything.  So far, I have no
> leads, but I haven’t spent much time on it yet.
>
> Thanks for testing!
>
>
> -- Tim
>


On Ubuntu there are  these files:

:~$ ls /usr/share/xsessions/
gnome-classic.desktop  ubuntu-communitheme-snap.desktop
gnome.desktop          ubuntu.desktop
gnome-xorg.desktop     xfce.desktop

and

~$ ls /usr/share/wayland-sessions/
gnome.desktop
ubuntu-communitheme-snap-wayland.desktop
ubuntu-wayland.desktop


These are the sessions that the greeter proposes

For example, the contents of /usr/share/xsessions/ubuntu.desktop are
[Desktop Entry]
Name=Ubuntu
Comment=This session logs you into Ubuntu
Exec=env GNOME_SHELL_SESSION_MODE=ubuntu gnome-session --$
TryExec=gnome-shell
Type=Application
DesktopNames=ubuntu:GNOME
X-Ubuntu-Gettext-Domain=gnome-session-3.0

and the contents of /usr/share/wayland-sessions/gnome.desktop are

[Desktop Entry]
Name=GNOME
Comment=This session logs you into GNOME
Exec=gnome-session --session=gnome
TryExec=gnome-shell
Type=Application
DesktopNames=GNOME
X-Ubuntu-Gettext-Domain=gnome-session-3.0