Comment 8 for bug 6616

I have the same problem, Toshiba Satellite Pro M10, Geforce4 Go 420.
previously with 8xxx drivers and my geforce go card. I found that you have to load the nvidia module with the option NVreg_Mobile=1 but this seems not to work anymore under ubuntu.

In order to load module with that option I usually create a file in /etc/modprobe.d called nvidia with the line "options nvidia NVreg_Mobile=1"

However this no longer works for some reason... I get a black screen with an underline cursor in the top left corner.