[XFree86] Fatal server error: HELP!

[Sean]

After type startx, it only show the screen of nVIDIA logo, then jump out back to console with following error code, what is that mean? and how to solve it out?   Fatal server error: Caught signal 11. Server aborting XIO: fatal IO error 104 (Connection reset by peer) on X server ":0.0" after 0 requests (0 known processed) with 0 events remaining.