[xubuntu] Dell Dimension 8200 desktop w. GeForce 5200 won''t wake up

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http://ubuntuforums.org – I've run Xubuntu reasonably well for years. I was running 11.10 and a few weeks ago I after a patch update it started going to sleep and it will not wake up. I believe this happened after a nvidia 173 patch update, but I'm not positive. I've upgraded to 12.04 and still have the same problem. In order to wake my desktop up I have to push the power button on and off between 3-6 times. I believe it may be a problem with old GeForce FX5200 graphics card. I've tried several several different thing (xset, mod x conf file, grub) and none of them seem to work. Is there any way to just com (Hardware)