Fix "Lock screen" in ElementaryOS Freya

freya-lock-fix.sh

#!/bin/bash
# Stupidly simple script to fix the lockscreen option in ElementaryOS Freya.
# It listens to a dbus event and calls `dm-tool lock`.
#
# Run it in the background and lock your screen whenever you want!
#
# $ freya-lock-fix.sh &
# $ disown
# -> Lock screen
#
# Note that Super+L still doesn't work.

interface=com.canonical.Unity.Session
member=Lock

skip=0

dbus-monitor --profile "interface='$interface',member='$member'" |
while read -r line; do
    if [ "$skip" == "0" ]; then
        skip=1
    else
        dm-tool lock &
    fi
done