You aren't getting a username prompt? If not, try pressing Ctrl-Alt-c, and see if you get a $. If you are getting a prompt, sign in and become root..
 
su [enter]
 
password [enter]
 
Did you change "nv" to "nvidia" in you XF86Config? If so, and you aren't getting a screen, change it back to "nv", and you should get X again. If you can post the exact errors you are getting, I feel certain someone here can help troubleshoot it with you. Probably getting the "cannot find a usable screen" error. Knowing the distro you are running will help too.
 
Edit: If you used Gedit or Kedit to change your XF86Config you'll now have to edit it from the command line. After becoming root go..
 
vi /etc/X11/XF86Config [enter]
 
Use the up and down arrows to get where you need to be. Be sure to press the "insert" key before editing or it won't take. Also, after editing and making sure it is correct, pree Esc then :x and enter to close and save it.
 
Now reboot, and you should have your old "nv" screen back.
 
Edit 2: The face above is written the same way as the write and quite command in vi which is a : followed by a x without a space..
[Edited by Dapper Dan on 2004-05-08 00:41:38]
 

Yes, also, make sure that the changes did take place, as DapperDan suggested, by looking at XF86Config.
 

Quote:NOTE: In other distros or versions, take note that you may need to comment out the entries in XF86Config-4 (or XF86Config, if your distro does not have the XF86Config-4 file), such as “load DRI” and “load GLCore.” Fedora, for example, uses a LOAD DRI entry that needs to be commented out (by putting a hash mark # before the entry, on the line that the entry resides on.  
Also look to see if you commented out any entries related to LOAD DRI and LOAD GLCore (near the top of the file) that can cause these errors to occur.

I'm using red hat 9.0. And i tink the problem is more serious cos instead of all the green OKs that appears on my screen when it boots up, alot of FAILED appears. The system will hang when its a the "system logger" part.

I would just re-install. Quicker, and the path of least resistance. You did install /home to it's own partition?

By the way, now would be a great time to update to Fedora Core 1. I've used RH 9 extensively, and Fedora is much better and more bug free.

I m still waiting for FC 2 then i'll download.

I m still waiting for FC 2 then i'll download.