<div>I use centos, the directory of Xorg is /usr/local/bin,when I execute the Xorg, the message is here: [lithx@localhost bin]$ sudo ./Xorg :1 -retro X.Org 17.2 X Server 1.17.2 Release Date: 2015-06-16 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.10.0-327.10.1.el7.x86_64 x86_64 Current Operating System: Linux localhost 3.10.0-327.10.1.el7.x86_64 #1 SMP Tue Feb 16 17:03:50 UTC 2016 x86_64 Kernel command line: BOOT_IMAGE=/vmlinuz-3.10.0-327.10.1.el7.x86_64 root=UUID=7b6c31f0-f031-40dc-8799-fafd08935839 ro crashkernel=auto rhgb quiet LANG=en_US.UTF-8 Build Date: 18 April 2016 07:52:56PM Before reporting problems, check http://wiki.x.org 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: "/usr/local/var/log/Xorg.1.log", Time: Tue May 10 02:04:30 2016 (==) Using config directory: "/etc/X11/xorg.conf.d" XKB: Failed to compile keymap Keyboard initialization failed. This could be a missing or incorrect setup of xkeyboard-config. (EE) Fatal server error: (EE) Failed to activate core devices.(EE) (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. (EE) Please also check the log file at "/usr/local/var/log/Xorg.1.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file. can you tell me what should I do? thank you. </div>