情况是这样的，我有2个VPS。都想要安装图形化界面比如GNOME，XFCE等。
但是发现最基本的Xorg都启动不起来

startx

root@baidu:/home/meteor# startx

X.Org X Server 1.11.3
Release Date: 2011-12-16
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.42-37-generic x86_64 Ubuntu
Current Operating System: Linux baidu.com 3.2.0-24-virtual #39-Ubuntu SMP Mon May 21 18:44:18 UTC 2012 x86_64
Kernel command line: root=/dev/xvda1 console=hvc0 ro 
Build Date: 27 February 2013  02:07:42AM
xorg-server 2:1.11.4-0ubuntu10.12 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.24.4
	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.0.log", Time: Tue Mar 12 06:24:43 2013
(==) Using system config directory "/usr/share/X11/xorg.conf.d"

Fatal server error:
no screens found

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

 ddxSigGiveUp: Closing log
Server terminated with error (1). Closing log file.
xinit: giving up
xinit: unable to connect to X server: No such file or directory
xinit: server error

startxfce4

root@baidu:/home/meteor# startxfce4
/usr/bin/startxfce4: Starting X server

X.Org X Server 1.11.3
Release Date: 2011-12-16
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.42-37-generic x86_64 Ubuntu
Current Operating System: Linux baidu.com 3.2.0-24-virtual #39-Ubuntu SMP Mon May 21 18:44:18 UTC 2012 x86_64
Kernel command line: root=/dev/xvda1 console=hvc0 ro 
Build Date: 27 February 2013  02:07:42AM
xorg-server 2:1.11.4-0ubuntu10.12 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.24.4
	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.0.log", Time: Tue Mar 12 06:27:06 2013
(==) Using system config directory "/usr/share/X11/xorg.conf.d"

Fatal server error:
no screens found

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

 ddxSigGiveUp: Closing log
Server terminated with error (1). Closing log file.
xinit: giving up
xinit: unable to connect to X server: No such file or directory
xinit: server error

错误的提示主要是找不到显示器或者显卡。
Fatal server error:
no screens found
不知道有没有人知道怎么解决？
cat了一下结果

root@baidu:/etc/X11# cat /var/log/Xorg.0.log
[  1376.573] 
X.Org X Server 1.11.3
Release Date: 2011-12-16
[  1376.573] X Protocol Version 11, Revision 0
[  1376.573] Build Operating System: Linux 2.6.42-37-generic x86_64 Ubuntu
[  1376.573] Current Operating System: Linux baidu.com 3.2.0-24-virtual #39-Ubuntu SMP Mon May 21 18:44:18 UTC 2012 x86_64
[  1376.573] Kernel command line: root=/dev/xvda1 console=hvc0 ro 
[  1376.573] Build Date: 27 February 2013  02:07:42AM
[  1376.574] xorg-server 2:1.11.4-0ubuntu10.12 (For technical support please see http://www.ubuntu.com/support) 
[  1376.574] Current version of pixman: 0.24.4
[  1376.574] 	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
[  1376.574] Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[  1376.574] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Mar 15 06:45:44 2013
[  1376.574] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[  1376.575] (==) No Layout section.  Using the first Screen section.
[  1376.575] (==) No screen section available. Using defaults.
[  1376.575] (**) |-->Screen "Default Screen Section" (0)
[  1376.575] (**) |   |-->Monitor "<default monitor>"
[  1376.575] (==) No monitor specified for screen "Default Screen Section".
	Using a default monitor configuration.
[  1376.575] (==) Automatically adding devices
[  1376.575] (==) Automatically enabling devices
[  1376.575] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[  1376.575] 	Entry deleted from font path.
[  1376.575] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[  1376.575] 	Entry deleted from font path.
[  1376.575] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[  1376.575] 	Entry deleted from font path.
[  1376.575] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[  1376.575] 	Entry deleted from font path.
[  1376.575] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[  1376.575] 	Entry deleted from font path.
[  1376.575] (WW) The directory "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType" does not exist.
[  1376.575] 	Entry deleted from font path.
[  1376.575] (==) FontPath set to:
	/usr/share/fonts/X11/misc,
	/usr/share/fonts/X11/Type1,
	built-ins
[  1376.575] (==) ModulePath set to "/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[  1376.575] (II) The server relies on udev to provide the list of input devices.
	If no devices become available, reconfigure udev or disable AutoAddDevices.
[  1376.575] (II) Loader magic: 0x7f951f08cb00
[  1376.575] (II) Module ABI versions:
[  1376.575] 	X.Org ANSI C Emulation: 0.4
[  1376.575] 	X.Org Video Driver: 11.0
[  1376.575] 	X.Org XInput driver : 16.0
[  1376.575] 	X.Org Server Extension : 6.0
[  1376.575] (II) Open ACPI successful (/var/run/acpid.socket)
[  1376.575] (II) LoadModule: "extmod"
[  1376.576] (II) Loading /usr/lib/xorg/modules/extensions/libextmod.so
[  1376.576] (II) Module extmod: vendor="X.Org Foundation"
[  1376.576] 	compiled for 1.11.3, module version = 1.0.0
[  1376.576] 	Module class: X.Org Server Extension
[  1376.576] 	ABI class: X.Org Server Extension, version 6.0
[  1376.576] (II) Loading extension MIT-SCREEN-SAVER
[  1376.576] (II) Loading extension XFree86-VidModeExtension
[  1376.576] (II) Loading extension XFree86-DGA
[  1376.576] (II) Loading extension DPMS
[  1376.576] (II) Loading extension XVideo
[  1376.576] (II) Loading extension XVideo-MotionCompensation
[  1376.576] (II) Loading extension X-Resource
[  1376.576] (II) LoadModule: "dbe"
[  1376.577] (II) Loading /usr/lib/xorg/modules/extensions/libdbe.so
[  1376.577] (II) Module dbe: vendor="X.Org Foundation"
[  1376.577] 	compiled for 1.11.3, module version = 1.0.0
[  1376.577] 	Module class: X.Org Server Extension
[  1376.577] 	ABI class: X.Org Server Extension, version 6.0
[  1376.577] (II) Loading extension DOUBLE-BUFFER
[  1376.577] (II) LoadModule: "glx"
[  1376.577] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[  1376.577] (II) Module glx: vendor="X.Org Foundation"
[  1376.578] 	compiled for 1.11.3, module version = 1.0.0
[  1376.578] 	ABI class: X.Org Server Extension, version 6.0
[  1376.578] (==) AIGLX enabled
[  1376.578] (II) Loading extension GLX
[  1376.578] (II) LoadModule: "record"
[  1376.578] (II) Loading /usr/lib/xorg/modules/extensions/librecord.so
[  1376.578] (II) Module record: vendor="X.Org Foundation"
[  1376.578] 	compiled for 1.11.3, module version = 1.13.0
[  1376.578] 	Module class: X.Org Server Extension
[  1376.578] 	ABI class: X.Org Server Extension, version 6.0
[  1376.578] (II) Loading extension RECORD
[  1376.578] (II) LoadModule: "dri"
[  1376.578] (II) Loading /usr/lib/xorg/modules/extensions/libdri.so
[  1376.579] (II) Module dri: vendor="X.Org Foundation"
[  1376.579] 	compiled for 1.11.3, module version = 1.0.0
[  1376.579] 	ABI class: X.Org Server Extension, version 6.0
[  1376.579] (II) Loading extension XFree86-DRI
[  1376.579] (II) LoadModule: "dri2"
[  1376.579] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
[  1376.579] (II) Module dri2: vendor="X.Org Foundation"
[  1376.579] 	compiled for 1.11.3, module version = 1.2.0
[  1376.579] 	ABI class: X.Org Server Extension, version 6.0
[  1376.579] (II) Loading extension DRI2
[  1376.579] (==) Matched vesa as autoconfigured driver 0
[  1376.579] (==) Matched fbdev as autoconfigured driver 1
[  1376.579] (==) Assigned the driver to the xf86ConfigLayout
[  1376.579] (II) LoadModule: "vesa"
[  1376.580] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[  1376.580] (II) Module vesa: vendor="X.Org Foundation"
[  1376.580] 	compiled for 1.11.3, module version = 2.3.0
[  1376.580] 	Module class: X.Org Video Driver
[  1376.580] 	ABI class: X.Org Video Driver, version 11.0
[  1376.580] (II) LoadModule: "fbdev"
[  1376.580] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[  1376.580] (II) Module fbdev: vendor="X.Org Foundation"
[  1376.580] 	compiled for 1.11.3, module version = 0.4.2
[  1376.580] 	ABI class: X.Org Video Driver, version 11.0
[  1376.580] (II) VESA: driver for VESA chipsets: vesa
[  1376.580] (II) FBDEV: driver for framebuffer: fbdev
[  1376.581] (--) using VT number 8

[  1376.581] (WW) Falling back to old probe method for vesa
[  1376.581] (WW) Falling back to old probe method for fbdev
[  1376.581] (II) Loading sub module "fbdevhw"
[  1376.581] (II) LoadModule: "fbdevhw"
[  1376.581] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[  1376.581] (II) Module fbdevhw: vendor="X.Org Foundation"
[  1376.581] 	compiled for 1.11.3, module version = 0.0.2
[  1376.581] 	ABI class: X.Org Video Driver, version 11.0
[  1376.581] (EE) open /dev/fb0: No such file or directory
[  1376.581] (EE) No devices detected.
[  1376.581] (==) Matched vesa as autoconfigured driver 0
[  1376.581] (==) Matched fbdev as autoconfigured driver 1
[  1376.581] (==) Assigned the driver to the xf86ConfigLayout
[  1376.581] (II) LoadModule: "vesa"
[  1376.582] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[  1376.582] (II) Module vesa: vendor="X.Org Foundation"
[  1376.582] 	compiled for 1.11.3, module version = 2.3.0
[  1376.582] 	Module class: X.Org Video Driver
[  1376.582] 	ABI class: X.Org Video Driver, version 11.0
[  1376.582] (II) UnloadModule: "vesa"
[  1376.582] (II) Unloading vesa
[  1376.582] (II) Failed to load module "vesa" (already loaded, 32661)
[  1376.582] (II) LoadModule: "fbdev"
[  1376.582] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[  1376.582] (II) Module fbdev: vendor="X.Org Foundation"
[  1376.582] 	compiled for 1.11.3, module version = 0.4.2
[  1376.582] 	ABI class: X.Org Video Driver, version 11.0
[  1376.582] (II) UnloadModule: "fbdev"
[  1376.582] (II) Unloading fbdev
[  1376.582] (II) Failed to load module "fbdev" (already loaded, 32661)
[  1376.582] (II) VESA: driver for VESA chipsets: vesa
[  1376.582] (II) FBDEV: driver for framebuffer: fbdev
[  1376.582] (++) using VT number 8

[  1376.582] (WW) xf86OpenConsole: setpgid failed: Operation not permitted
[  1376.582] (WW) xf86OpenConsole: setsid failed: Operation not permitted
[  1376.582] (WW) Falling back to old probe method for vesa
[  1376.582] (WW) Falling back to old probe method for fbdev
[  1376.582] (II) Loading sub module "fbdevhw"
[  1376.582] (II) LoadModule: "fbdevhw"
[  1376.583] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[  1376.583] (II) Module fbdevhw: vendor="X.Org Foundation"
[  1376.583] 	compiled for 1.11.3, module version = 0.0.2
[  1376.583] 	ABI class: X.Org Video Driver, version 11.0
[  1376.583] (EE) open /dev/fb0: No such file or directory
[  1376.583] (EE) No devices detected.
[  1376.583] 
Fatal server error:
[  1376.583] no screens found
[  1376.583] 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
[  1376.583] Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[  1376.583] 

我看了下，好像是Xen虚拟机的问题。
最好是用Red Hat系列的CentOS，而不要用Debian系列。
http://sysadmin.circularvale.com/serv...
试验了下来，用centOS也不行。
现在不知道怎么办了。