我搞砸了。
我使用的是HP Pavilion dv6000笔记本电脑，配备有nVidia GeForce 8400M GS显卡。我遇到了外部显示器分辨率的问题，Ubuntu显示管理器无法识别正确的显示器分辨率，所以我开始在nVidia X服务器设置中进行调整。我添加了X Screen 1并保存到X配置文件中。不知道怎么回事，我不小心关闭了内置显示器，现在无法再打开它。之后，我更新了显卡驱动程序，但问题仍然存在。
nvidia-smi输出：
我的猜测是我应该从xorg.conf中删除对Screen 1的所有引用，或者恢复此文件为原始文件。然而，xorg.conf.backup文件也不是原始文件，因为在解决这个问题时我多次重启了系统。
有任何想法如何修复这个问题，或者在哪里找到GeForce 8400M GS的原始xorg.conf文件吗？
nvidia-smi输出：
+------------------------------------------------------+
| NVIDIA-SMI 340.102 Driver Version: 340.102 |
|----------------------------+-------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|============================+===================+======================|
| 0 GeForce 8400M GS Off | 0000:01:00.0 N/A | N/A |
| N/A 65C P0 N/A / N/A | 234MiB / 255MiB | N/A Default |
+----------------------------+-------------------+----------------------+
+-----------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=======================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------+
xorg.conf
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 361.42 (buildd@lgw01-18) Tue Apr 5 14:33:28 UTC 2016
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
# HorizSync source: builtin, VertRefresh source: builtin
Identifier "Monitor0"
VendorName "Unknown"
ModelName "CRT-0"
HorizSync 28.0 - 55.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "AU Optronics Corporation"
HorizSync 30.0 - 75.0
VertRefresh 60.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400M GS"
BusID "PCI:1:0:0"
Screen 0
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400M GS"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "CRT-0"
Option "metamodes" "VGA-0: 1360x768 +0+0"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "LVDS-0: nvidia-auto-select +0+0 {viewportin=1440x900}"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
EndSubSection
EndSection
我的猜测是我应该从xorg.conf中删除对Screen 1的所有引用，或者恢复此文件为原始文件。然而，xorg.conf.backup文件也不是原始文件，因为在解决这个问题时我多次重启了系统。
有任何想法如何修复这个问题，或者在哪里找到GeForce 8400M GS的原始xorg.conf文件吗？