按照教程安装图形界面然后我在命令行下startx,出现错误

elease Date: 2017-03-15
X Protocol Version 11, Revision 0
Build Operating System: 3.10.0-693.17.1.el7.x86_64
Current Operating System: Linux izs3r8cx94gq1yz 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.10.0-514.26.2.el7.x86_64 root=UUID=59d9ca7b-4f39-4c0c-9334-c56c182076b5 ro crashkernel=auto rhgb quiet net.ifnames=0 console=tty0 console=ttyS0,115200n8
Build Date: 07 March 2018 01:39:22PM
Build ID: xorg-x11-server 1.19.3-11.el7_4.2
Current version of pixman: 0.34.0
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: "/var/log/Xorg.1.log", Time: Mon Mar 19 21:06:48 2018
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
xinit: connection to X server lost

waiting for X server to shut down (II) Server terminated successfully