Light Locker and GNOME 3.16

[alucryd]

It seems I can't use Light Locker together with GNOME 3.16 on Arch Linux, works fine with Openbox or XFCE. Here is what I get:

light-locker --debug
[gs_debug_init] gs-debug.c:106 (12:17:10):   Debugging enabled
[main] light-locker.c:126 (12:17:10):    initializing light-locker 1.6.0
[main] light-locker.c:128 (12:17:10):    lock after screensaver 5
[main] light-locker.c:129 (12:17:10):    late locking 0
[main] light-locker.c:130 (12:17:10):    lock on suspend 1
[init_session_id] gs-listener-dbus.c:1882 (12:17:10):    Got session-id: /org/freedesktop/login1/session/c39
[init_session_id] gs-listener-dbus.c:1887 (12:17:10):    Got sd-session-id: c39
[init_seat_path] gs-listener-dbus.c:1964 (12:17:10):     Got seat: /org/freedesktop/DisplayManager/Seat0

** (light-locker:15889): WARNING **: screensaver already running in this session

I guess GNOME has its own screensaver running, but I can't find what it is and how to disable it. Have you got any ideas?

[ochosi]

Are you using Gnome with GDM? If so, light-locker won't work with that and you should use gnome-screensaver, which is now integrated with GDM.

If you are using LightDM, it should work fine, maybe you can tell us more about your setup.

[alucryd]

I am aware that gnome-screensaver is now part of GDM and did my tests using LightDM of course, It used to work fine with a GNOME session when I pushed light-locker in our repos (don't remember which GNOME we were at at the time). Today I realized it no longer worked with a Pantheon session (derivative of a GNOME session) launched via LightDM, and confirmed that vanilla GNOME launched via LightDM didn't work either.

[lots0logs]

I was able to get it to work by launching it from lightdm's xsession wrapper script just before gnome is launched: /etc/lightdm/Xsession

....

/usr/bin/light-locker &
echo "X session wrapper complete, running session $@"

exec $@

[alucryd]

Nice find, I can't package lightdm with this workaround, but I'll write sth on the wiki when I have time.

[lots0logs]

I can't tell you how happy I am to FINALLY have a viable solution for locking the screen in GNOME without GDM! Kudos to @cavalier38 , @kelemeng , and all contributors for making this possible :+1: :beers:

[CameronNemo]

Pantheon on Freya already uses light-locker, so you should not do that hack there.

[oblitum]

Not working for me too by default. I'm on a just fully updated Arch with Gnome 3 and LightDM (using a webkit greeter). I think I'll have to try @lots0logs's hack.

[oblitum]

Yes this hack works and made https://github.com/Antergos/gnome-shell-extension-status-menu-buttons functional.

[oblitum]

Actually I've changed the location for that line to an executable .xsession file in my home directory, since /etc/lightdm/Xsession loads it.

[postadelmaga]

Why this is closed, this problem is still present on gnome 3.22.x:

• it is simply not possible to use light locker and gnome

[lots0logs]

@postadelmaga That's not true. It is certainly possible to do it. In fact our default GNOME installation uses light-locker.

[postadelmaga]

Here a related thread if you can give some hint it will be useful.

My experience: I have installed Antergos on 2 machine ( one now and one 6 month ago ) on both machine I have same issue, light locker is not working.

• Settings -> Power: Blank screen (1 min)
• Settings -> Privacy: Screen Lock (yes)
• Light locker:
  • Blank screen after (1 min)
  • Switch screen off after (2 min)

I have configured startup applications:

• Light Locker
• xset s 60 dpms 420 0 0

These are basically the default settings of Antergos with Gnome.

What is wrong in my settings ?