Re: nvidia 7300 and ATI RS480/482 chipset incompatibilities (driver BUG)
I also have a Palit 256MB 7300GS and a MSI RX480 Neo2-F S939 mobo.
I have tried both nvidia drivers 9631 and 9755 on fresh installs of Ubuntu Edgy and Feisty (kernel 220.127.116.11 currently).
And in both direct rendering works and I can even run beryl.
However It takes about two minutes (less if you 'spin the cube') and the system goes into a hard lock. (system reset only option) I have not found a solution on any other forums but this thread leads me to believe that there is a mobo/graphics card problem
Time to replace motherboard I think