acpid survival guide added.

acpid_survival_guide

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+#####################################
+## GUIDE TO SURVIVE THE ACPID MESS ##
+#####################################
+
+# Install acpid using apt-get or dnf
+sudo dnf install acpid
+
+# Enable acpid at startup
+systemctl enable acpid.service
+
+# Check if the use of some keys is inhibited by some program
+systemd-inhibit --list
+
+
+# The following applies if the problem is xfce4-power-manager.
+
+# Tell xfce4 not to handle power key
+xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/logind-handle-power-key -n -t bool -s true
+
+# Tell xfce4 not to handle the lid switch
+xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/logind-handle-lid-switch -n -t bool -s true
+
+# Tell xfce4 not to handle suspend key
+xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/logind-handle-suspend-key -n -t bool -s true
+
+# Tell xfce4 not to handle hibernate key
+xfconf-query -c xfce4-power-manager -p /xfce4-power-manager/logind-handle-hibernate-key -n -t bool -s true
+
+# Stop and restart the power manager
+xfce4-power-manager -q
+xfce4-power-manager
+
+# In /etc/systemd/logind.conf change the following to tell systemd not to handle the some keys
+# Power button
+HandlePowerKey=ignore
+
+# Suspend key
+HandleSuspendKey=ignore
+
+# Hibernate key
+HandleHibernateKey=ignore
+
+# The lid switch
+HandleLidSwitch=ignore
+
+# Now everything should run smoothly, enjoy your acpid.
+
+# NB: systemd runs acpid as root. I repeat: AS ROOT, not as SUDO. This means that the acpid scripts will often have to use 
+# su - user 
+# to execute a command from the right username. You will also have to specify stuff like DISPLAY:=0 to instruct X about where to display
+# what. Enjoy your acpid experience.