Let me add that analyzing the process list with grep is a rather poor
hack, so the line

if ps -Af | grep -q '[k]desktop' && pidof dcopserver > /dev/null && test
-x /usr/bin/dcop ; then

in /etc/acpi/powerbtn.sh might yield false positive results (such as
"kate kdesktop" etc.)


The sophisticated way to do it is

if ps -C kdesktop > /dev/null [...]
or
if pidof kdesktop > /dev/null [...]


Kind regards,
  Thomas

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sometimes power button shuts down without asking 
https://bugs.launchpad.net/bugs/119063
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