I have the NVIDIA display driver from CUDA 5.0 Pre-release (on a SONY vaio) installed with 12.04. X works fine, but I if I press Ctrl+Alt+F1 the screen turns black and no login prompt appears. Its definitely a graphic driver issue because the screen is completely black. Not even a blinking text cursor. Just black, I can switch back to X however. That's fine.
I'd like to upgrade and install the NVIDIA display driver from the CUDA 5.0 production release. But here comes the tricky part: The new display driver can only be installed with no X running. However, if I run
init 1 (to turn off X, networking, etc.) the screen remains black. I have to reboot in this situation.
Now, if I change the default runlevel temporarily to 1 so that X doesn't start, then I fear that the display driver cannot display anything just like in the above cases. And this would be very bad since then I don't know how to recover from this state. And actually it is very likely that I run into this because there was never a text output seen on my system when NVIDIA driver is active.
What are my options?