我的筆記型電腦採用了 nvidia optimus 技術。我已經安裝了 bumblebee，一切似乎都正常工作。問題是，當我登入後將第二個顯示器連接到筆記本時，它運作得很好，但是當我在連接顯示器的情況下啟動筆記本時，Xserver 無法啟動。如何配置xserver使其工作？
這是我的硬體配置：
$ xrandr -q
Screen 0: minimum 320 x 200, current 3040 x 900, maximum 8192 x 8192
LVDS1 connected 1600x900+1440+0 (normal left inverted right x axis y axis) 382mm x 214mm
1600x900 60.0*+
1440x900 59.9
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA2 connected 1440x900+0+0 (normal left inverted right x axis y axis) 410mm x 256mm
1440x900 59.9*+
1280x1024 75.0 60.0
1152x864 75.0
1280x720 75.0 60.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
編輯：這是我的 Horg.log
[ 15.921] (==) Log file: "/var/log/Xorg.0.log", Time: Sat Jan 7 23:00:34 2012
[ 15.921] (==) Using config file: "/etc/X11/xorg.conf"
[ 15.921] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 15.921] (==) No Layout section. Using the first Screen section.
[ 15.921] (==) No screen section available. Using defaults.
[ 15.921] (**) |-->Screen "Default Screen Section" (0)
[ 15.921] (**) | |-->Monitor "<default monitor>"
[ 15.921] (==) No device specified for screen "Default Screen Section".
Using the first device section listed.
[ 15.921] (**) | |-->Device "Default Device"
[ 15.921] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 15.921] (==) Automatically adding devices
[ 15.921] (==) Automatically enabling devices
[ 15.921] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[ 15.921] Entry deleted from font path.
[ 15.921] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[ 15.921] Entry deleted from font path.
[ 15.921] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[ 15.921] Entry deleted from font path.
[ 15.921] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[ 15.921] Entry deleted from font path.
[ 15.921] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[ 15.921] Entry deleted from font path.
[ 15.921] (==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/Type1,
/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType,
built-ins
[ 15.921] (==) ModulePath set to "/usr/lib/x86_64-linux-gnu/xorg/extra-modules,/usr/lib/xorg/extra-modules,/usr/lib/xorg/modules"
[ 15.921] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 15.921] (II) Loader magic: 0x7e0220
[ 15.921] (II) Module ABI versions:
[ 15.921] X.Org ANSI C Emulation: 0.4
[ 15.921] X.Org Video Driver: 10.0
[ 15.921] X.Org XInput driver : 12.3
[ 15.921] X.Org Server Extension : 5.0
我的 xorg.conf 幾乎是空的：
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
如何配置 Xorg 使其正常工作？