[xubuntu] Laptop halting instead of powering off

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http://ubuntuforums.org – I have a Dell inspiron 2500 PIII with Xubuntu 9.04 It's working well enough but when I try to shut it down it goes through the motions and stops at system is halted. then it will shut off with a touch to the power button. Where would I start looking to try and get it to shut all the way off without me pressing the power button? (Hardware)