black screen at boot [SOLVED]

[necromonger]

I get a black screen at boot with a login prompt i have no idea what is going on or how to fix it.i have tried to use the repair prompt and still no luck. please help.

[necromonger]

just did a reinstall works fine now thanks tor the help.

[ingeon]

Cool. I just tried getting in and used the acpi=off that got me in but then it gave me gibberish.
Got the same with nomodeset. Just changed Compiz Windows manager to Metacity and could then install

http://ubuntuforums.org/showthread.php?t=1613132
nomodeset
The newest kernels have moved the video mode setting into the kernel. So all the programming of the hardware specific clock rates and registers on the video card happen in the kernel rather than in the X driver when the X server starts.. This makes it possible to have high resolution nice looking splash (boot) screens and flicker free transitions from boot splash to login screen. Unfortunately, on some cards this doesnt work properly and you end up with a black screen. Adding the nomodeset parameter instructs the kernel to not load video drivers and use BIOS modes instead until X is loaded.

Note that this option is sometimes needed for nVidia cards when using the default "nouveau" drivers. Installing proprietary nvidia drivers usually makes this option no longer necessary, so it may not be needed to make this option permanent, just for one boot until you installed the nvidia drivers.

Ps. As a side note. The default theme color contrasts make it difficult to read things (like installer is black and grey and text boxes are white/light grey)