Can't resume after suspend

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http://forums.fedoraforum.org – Hi, I am running Fedora 17 on a Fujitsu Siemens Amilo li1718 laptop with Radeon Xpress 200m graphics card. When trying to resume after suspend I just get a blank screen. Also the wireless light goes out. No buttons work. I have to hold the power button to force the computer to turn off, then reboot. Stangely, even after doing this, if I have the power cable plugged in, the computer does the same thing as a failed resume when I try to reboot it. After holding the power button to turn the computer off, I have to unplug the power cable, then press the power button to boot up again. C (HowTos)