The same issue (blank screen) on G310M with brand new NVIDIA 260.19.06 drivers that come with Ubuntu 10.10. Actually the situation is much worse because providing EDID doesn't help.
I had to install 256.44 driver from ftp://download.nvidia.com/XFree86/Li..._64-256.44.run
and add the IgnoreABI option. BTW 256.44 doesn't work without providing EDID either. Looks like a serious regression from 256.44 to 260.19.