Bump and some more info.
I spent a considerable amount of time in the search facility reading articles. However, none of them seem to show all of my symptoms. Sorry if this has already been posted :(
I would like to add that I have been using the computer with the onboard graphics unit for a little over a week with no problems, other than the computer sometimes requiring a manual restart (holding the power button) because of not coming out of hibernate. It has been running ok without a graphics cad, but I really don't want to use this onboard forever, and I would like to ride this computer out as long as possible.
Some specs off-hand:
HP Pavillion m7790e
AMD X2 Dual Core +5000 ~2.6 GHz
Geforce 6150 LE (onboard)
Gefore 7600 GT 256mb RAM (factory installed)
Geforce 9500 GT 512mb DDR3 (brand new)
Power Supply: 350 Watts