Ubuntu pixelation problem?

I recently decided to upgrade to Ubuntu 9.04. While in the installation process after a while the screen changes colors and pixelates. After trying to get through the installation before it happened I got it and it is now installed. But even now when I boot it it pixelates almost immediately.



On the Ubuntu help website it describes my problem perfectly and gives a solution that goes over my head.



'; If your screen begins to show a weird picture while the kernel boots, eg. pure white, pure black or colored pixel garbage, your system may contain a problematic video card which does not switch to the framebuffer mode properly. Then you can use the boot parameter fb=false video=vga16:off to disable the framebuffer console. ';



How do you get to the part where you can change the boot parameter and how do I fix the problem from there? Can someone help me fix this problem in a way thats easier to understand?Ubuntu pixelation problem?
When you boot your computer.. After the bios screen.. You see something that says



GRUB loading



Hit 'esc' to enter menu



Well.. hit your esc key :-)



This will bring up the GRUB menu with the first entry highlighted.



hit 'e' to edit the commands..



hit the down arrow to go to the line that says 'kernel /boot/vmlinuz-----blah blah etc.. etc.. and hit your 'e' key again

it will take you to the end of that line and you can enter the boot parameters there.



you will see something like....... ro quiet splash

add what you want and hit enter



Then hit 'b' to boot the system



Hope the parameters are what you need to fix your system :-)