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root@mazgalici:~# startx

X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-28-server i686 Ubuntu
Current Operating System: Linux mazgalici 2.6.18-194.26.1.el5.028stab079.2PAE #1 SMP Fri Dec 17 19:34:22 MSK 2010 i686
Kernel command line: quiet
Build Date: 10 November 2010  11:25:26AM
xorg-server 2:1.7.6-2ubuntu7.4 (For technical support please see )
Current version of pixman: 0.16.4
        Before reporting problems, check 
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Jan 11 01:28:48 2011
(==) Using config directory: "/usr/lib/X11/xorg.conf.d"

Fatal server error:
xf86OpenConsole: Cannot open /dev/tty0 (No such file or directory)

Please consult the The X.Org Foundation support
 for help.
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

 ddxSigGiveUp: Closing log
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closed as too localized by Tom O'Connor, dunxd, sysadmin1138 Feb 21 '13 at 20:50

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Well, what does ls -l /dev/tty0 tell you? – Dennis Williamson Jan 11 '11 at 1:04
crw-rw---- 1 root dialout 4, 0 2011-01-08 21:32 /dev/tty0 – mazgalici Jan 11 '11 at 8:40
Reopen. This question should not have been closed. It is related to xorg, a widely used (if not most-used desktop server) desktop server. I have this same error message. Perhaps the question title needs to be changed to "How can I deal with ..." or "What does ... error mean?" – macmadness86 Jul 25 '15 at 6:37

Do you have a modem connected to this machine? Not sure why it would have group dialout. That's odd. What is the contents of /var/log/Xorg.0.log? Try running:

 startx -- :1

Also, what terminal is your user running on? Run a 'who' to see if anyone else is using /dev/tty0. Or better yet an lsof on it.

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