Problems with the X Server Crashing and Non-Root Users

If you are having trouble with the X server crashing when anyone other than root
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:

  • 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.

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