xscreensaver-systemd - lock the screen upon suspend, and inhibit screen-blanking during video playback.
- When the system is about to go to sleep (e.g., the laptop lid has just been closed) it locks the screen just before the system sleeps, by running xscreensaver-command -suspend. When the system wakes up again, it runs xscreensaver-command -deactivate to make the unlock dialog appear immediately. It does this through the org.freedesktop.login1(5) D-Bus interface.
- When another process on the system asks for the screen saver to be inhibited (e.g. because a video is playing) this program periodically runs xscreensaver-command -deactivate to keep the display un-blanked. It does this until the other program asks for it to stop, or exits. It does this through the org.freedesktop.ScreenSaver(5) D-Bus interface.
Only one program at a time can register with systemd(1) for screen-saver-related events, so if another screen saver is running as a part of the desktop environment, xscreensaver-systemd will be unable to launch. Likely adversaries include ksmserver(1) and gsd-screensaver-proxy(1).
Copyright © 2019-2021 by Martin Lucina and Jamie Zawinski. Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
The software is provided "as is" and the author disclaims all warranties with regard to this software including all implied warranties of merchantability and fitness. in no event shall the author be liable for any special, direct, indirect, or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of this software.
Martin Lucina <firstname.lastname@example.org>, 4-Jun-2019
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