xubuntu boot error - won't start x server

[redrummer]

I need a little help.
When I boot xubuntu, I'm getting a message:

Could not start x server (your graphical environment) due to some internal error. Please contact your system administrator or check your syslog to diagnose. In the meantime this display will be disabled. Please retart GDM when the problem is corrected.

[devils casper]

Boot up in command line mode ( Failsafe ) and execute startx command. Post error message here.

[redrummer]

Okay, I'm typing all this out by hand since I can't copy/paste.

mktemp: cannot create temp file /tmp/serverauth.QuTVPR5363: Read-only file system
/usr/bin/startx: line 139: cannot create temp file for here document: Read-only file system
xauth: error in locking authority file /home/john/.Zauthority
/usr/bin/startx: line 151: cannot create temp file for here document: Read-only file system
xauth: error in locking authority file /home/john/.Xauthority
/usr/bin/startx: line 151: cannot create temp file for here document: Read-only file system

Fatal server error:
Could not create lock file in /tmp/.tX0-lock

giving up.
xinit: No such file or directory (errno 2): unable to connect to x server
xinit: No such process (errno 3): Server error.
xauth: error in locking authority file /home/john/.Xauthority

[redrummer]

ttt
Anyone?

[devils casper]

Boot up in Recovery Mode and run fsck command on each partition.