Problems with the X Server Crashing and Non-Root Users
If you are having trouble with the X server crashing when anyone logs in, you may have a full file system (or, a lack of available hard drive space).
To verify that this is the problem you are experiencing, run the following command:
[oracle@localhost ~]$ df -h
The df command should help you diagnose which partition is full. For additional information about df and an explanation of the options available (such as the -h option used in this example), refer to the df man page by typing man df at a shell prompt.
A key indicator is 100% full or a percentage above 90% or 95% on a partition. The /home/ and /tmp/ partitions can sometimes fill up quickly with user files. You can make some room on that partition by removing old files. After you free up some disk space, try running X as the user that was unsuccessful before.
ORThis problem may be resolved in this way:
1. When the message about viewing the X server output came, I pressed Ctrl Alt F2
2. Now on the new shell I ran command sudo Xorg -configure
3. Then I copied /home/oobe/xorg.conf.new to /etc/X11/xorg.conf
sudo cp /home/oobe/xorg.conf.new /etc/X11/xorg.conf
4. At last I started X using command startx.
