安装图形界面后startx后错误，无法进入图形界面

[zjwyczj]

我安装了xorg，lightdm，和xubuntu-desktop。重启或者startx后均无法进入图形界面
这是/var/log/Xorg.0.log的消息，希望能在论坛上得到帮助。
[ 1918.220]
X.Org X Server 1.15.1
Release Date: 2014-04-13
[ 1918.221] X Protocol Version 11, Revision 0
[ 1918.221] Build Operating System: Linux 3.2.0-67-highbank armv7l Ubuntu
[ 1918.221] Current Operating System: Linux localhost.localdomain 3.10.17 #58 SMP PREEMPT Wed Apr 29 15:24:28 CST 2015 armv7l
[ 1918.222] Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk0p2 rootwait rw
[ 1918.222] Build Date: 12 February 2015 02:55:07PM
[ 1918.223] xorg-server 2:1.15.1-0ubuntu2.7 (For technical support please see http://www.ubuntu.com/support)
[ 1918.223] Current version of pixman: 0.30.2
[ 1918.224] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 1918.224] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 1918.226] (==) Log file: "/var/log/Xorg.0.log", Time: Tue May 19 02:24:08 2015
[ 1918.228] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 1918.231] (==) No Layout section. Using the first Screen section.
[ 1918.231] (==) No screen section available. Using defaults.
[ 1918.231] (**) |-->Screen "Default Screen Section" (0)
[ 1918.231] (**) | |-->Monitor "<default monitor>"
[ 1918.233] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 1918.233] (==) Automatically adding devices
[ 1918.234] (==) Automatically enabling devices
[ 1918.234] (==) Automatically adding GPU devices
[ 1918.234] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 1918.234] Entry deleted from font path.
[ 1918.234] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 1918.234] Entry deleted from font path.
[ 1918.235] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 1918.235] Entry deleted from font path.
[ 1918.235] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 1918.235] Entry deleted from font path.
[ 1918.235] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 1918.235] Entry deleted from font path.
[ 1918.235] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
built-ins
[ 1918.235] (==) ModulePath set to "/usr/lib/arm-linux-gnueabihf/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[ 1918.236] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 1918.236] (II) Loader magic: 0x76f5df10
[ 1918.236] (II) Module ABI versions:
[ 1918.236] X.Org ANSI C Emulation: 0.4
[ 1918.236] X.Org Video Driver: 15.0
[ 1918.236] X.Org XInput driver : 20.0
[ 1918.236] X.Org Server Extension : 8.0
[ 1918.238] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 1918.239] (EE)
[ 1918.239] (EE) Backtrace:
[ 1918.240] (EE)
[ 1918.240] (EE) Segmentation fault at address 0x0
[ 1918.241] (EE)
Fatal server error:
[ 1918.241] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 1918.242] (EE)
[ 1918.242] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 1918.243] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 1918.243] (EE)

[poloshiao]

tty1
試試
sudo service lightdm start
可以簡化為
sudo start lightdm