Bug#935194: xfce4-session: Xfce session fails to start when previously logged into GNOME
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On Tue, 2019-08-20 at 20:39 +0200, Ronny Standtke wrote:
> When you log into GNOME (or Cinnamon or MATE) the environment variable
> SESSION_MANAGER will be set. If you then log out and try logging into
> Xfce it will fail. You will simply be catapulted back to the gmd login
> screen. The following error message will appear in the system journal
> (the PID may vary of course):
> /usr/lib/gdm3/gdm-x-session[5992]: xfce4-session: Another session
> manager is already running
>
> This is implemented here:
> https://salsa.debian.org/xfce-team/desktop/xfce4-session/blob/debian/master/xfce4-session/main.c#L96
>
> I am not very familiar with all the details concerning this variable but
> the attached patch is a workaround that unsets the variable
> SESSION_MANAGER in
> /etc/X11/Xsession.d/55xfce4-session. This way it is possible to first
> log into GNOME, log out and then log into Xfce.
Hi, at first sight that doesn't look like a good idea. I have no idea why
SESSION_MANAGER is already set when you start Xfce the second time, but it
looks like a bug in either gdm or gnome. Just ignoring the fact that a manager
might be running doesn't look sound.
Can you get in touch with gnome and gdm people about this?
Regards,
- --
Yves-Alexis
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