From here

#!/usr/bin/perl
my $cmd = q[dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver',member='SessionIdleChanged'"];
open (IN, "$cmd |");
while (<IN>) {
    if (/^\s+boolean true/) {
        system '~/gpufolding/gpufah.bash';
    }
    elsif (/^\s+boolean false/) {
        system 'kill `pgrep gupfah.bash`';
        system 'kill `pgrep Folding.*home`';
    }
}

---

From here

#!/usr/bin/perl
#gnome
my $cmd = "dbus-monitor --session \"type='signal',interface='org.gnome.ScreenSaver',member='SessionIdleChanged'\"";

open (IN, "$cmd |");

while (<IN>) {
if (m/^\s+boolean true/) {
#when screensaver activates, run the following commands
#system("/home/eric/compiled/scripts/rtorrentstart");
system("touch /home/asoukenka/rtorrenthasstarted");
} elsif (m/^\s+boolean false/) {
#when screensaver deactivates, run the following commands
#system("kill `pgrep rtorrent`");
system("touch /home/asoukenka/rtorrenthasbeenkilled");
}
}

and

#!/usr/bin/perl
#requires:
# rtorrent, screen, gnome/kde, perl
#
# Instructions:
# - Properly comment the line for gnome or kde
# - Give script execute permission (chmod +x)
# - Run script ./<scriptname> **** do not use rtorrent in script name will mess up kill command
#
# There is a log file created by the script at /tmp/autortorrent 
#
#


#gnome
#my $cmd = "dbus-monitor --session \"type='signal',interface='org.gnome.ScreenSaver',member='SessionIdleChanged'\"";

#kde
my $cmd = "dbus-monitor --session \"type='signal',interface='org.freedesktop.ScreenSaver',member='ActiveChanged'\"";
open (IN, "$cmd |");

while (<IN>) {
if (m/^\s+boolean true/) {
#when screensaver activates, run the following commands
system("echo \"--------------------------------------------------------------------\" >> /tmp/autortorrent");
system("screen -dmS rtorrent rtorrent");
system("echo \"started:\" >> /tmp/autortorrent");
system("date >> /tmp/autortorrent");
system("echo \"--------------------------------------------------------------------\" >> /tmp/autortorrent");
} elsif (m/^\s+boolean false/) {
#when screensaver deactivates, run the following commands
system("echo \"--------------------------------------------------------------------\" >> /tmp/autortorrent");
system("kill `pgrep rtorrent`");
system("echo \"stopped:\" >> /tmp/autortorrent");
system("date >> /tmp/autortorrent");
#system("ps aux |grep rtorrent >> /tmp/autortorrent");
system("echo \"--------------------------------------------------------------------\" >> /tmp/autortorrent");
}
}

---

from here

#!/bin/sh
gnome-screensaver-command --lock
xset dpms force off
gnome-screensaver-command --inhibit
exit

also some stuff in here

Try to run gnome-screensave in no-daemon and debug mode to see what’s going on… according to https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/193192

---

Some inhibit stuff from here

#!/usr/bin/python
import subprocess

#run inhibition
ss_inhibit = subprocess.Popen(["gnome-screensaver-command", "-i", "-n", 
                               "mplayer", "-r", "video"])

#run gmplayer
player = subprocess.Popen("gmplayer")

#wait for mplayer to exit
player.wait()

#kill the inhibition
ss_inhibit.kill()

---

or from here

dbus-send --session --dest=org.gnome.ScreenSaver --type=method_call --print-reply --reply-timeout=20000 /org/gnome/ScreenSaver org.gnome.ScreenSaver.Inhibit string:"MPlayer" string:"Watching video"

or

dbus-send --session --dest=org.freedesktop.ScreenSaver --type=method_call /ScreenSaver org.gnome.ScreenSaver.SimulateUserActivity
dbus-send --session --dest=org.gnome.ScreenSaver --type=method_call --print-reply --reply-timeout=20000 /org/gnome/ScreenSaver org.gnome.ScreenSaver.Inhibit string:"MPlayer" string:"Watching video"
gnome-screensaver-command --poke

---