Abnormal shutdown process

Dear Andrei, Thank you very much for your response. # dpkg -l firestarter Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Naam Versie

Abnormal shutdown process

Dear ladies and gentlemen, Since 10 July 2014 my Debian system does not shut down well anymore. I have worked many hours trying to solve the problem. Now I have decided to seek some help from the Debian community. I use the GNOME desktop environment to shut down my computer. My computer then