This error appears during Ubuntu 10.04 start up and I can run in low graphics mode. I tried to install the NVIDIA driver and then it works but when I reboot Ubuntu this error appears:
(EE) NVIDIA(0): Faild to initialize the NVIDIA kernel module. please see the system's kernel log for additional error messages and consult the NVIDIA README for details. (EE) NVIDIA(0): ***Aborting*** (EE) Screen(s) found, but none have a usable configuration.
nvidia-xconfig and then restarted gdm but it's still broken.