Which file replace /etc/modprobe.conf in Ubuntu?

[Loïc Martin]

Hi,
I'm having trouble to get nvidia proprietary drivers working on an 
Inspiron 8200 (it's a known pb, due to a bug in the LCD that sends bad 
EDID to the driver), and a solution I'd like to try asks for adding

options nvidia NVreg_Mobile=0 NVreg_ModifyDeviceFiles=0

in /etc/modprobe.conf

I guess it might be true on FC, but I can't find this file in Ubuntu. 
Anyone knows which file I should use instead?
Thanks,
Loïc