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dc48bd653c
When we're using server managed-fds through systemd-logind, systemd-logind *must* keep running while we are using it, as it does things like drmSetMaster and drmDropMaster for us on vt-switch. On a systemd-logind restart, we cannot simply re-connect since we will then get a different fd for the /dev/dri/card# node, and we've tied a lot of state to the old fd. I've discussed this with the systemd people, and in the future there may be a restart mechanism were systemd-logind passed fds from the old logind to the new logind. But for now there answer is simply: "Don't restart systemd-logind", and there never really is a good reason to restart it. So to ensure unpleasentness if people do decide to restart systemd-logind anyways (or when it crashes), monitor logind going away and make this a fatal error. This avoids getting a hard-hung machine on the next vt-switch and will hopefully quickly educate users to not restart systemd-logind while they have an X session using it active. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
Xorg mailing list:
http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/xserver
http://cgit.freedesktop.org/xorg/xserver
For patch submission instructions, see:
http://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
http://wiki.x.org/wiki/GitPage