Possible Duplicate:
My computer boots to a black screen, what options do I have to fix it?
I installed Ubuntu 10.04 desktop AMD 64 on a PC running Windows 7 and the dual booting worked just fine, but "something" happened. Now, When choosing Ubuntu at start-up, only a blank screen appears. Since the graphics card is Nvidia (GPU processor: GeForce 6150SE nForce 430 Driver version: 186.55), I hoped the following steps from another post would help:
If your graphics card is Nvidia, follow these steps: In the GRUB menu at startup, press "e"; then Use the arrow keys to replace quiet splash with no splash or nomodeset. Then press the CTRL+X key combination to boot.
There is no "quiet splash" text to edit. I tried adding "no splash" as the final line, but upon "CTRL-X", the system booted into Windows, which is the default.