我有一台 Mac Pro 系统，配有两块升级版的 NVidia 8800 GT 显卡。我使用四台显示器。中间的显示器是 30 英寸的 2560x1600 显示器，两边各有两台 24 英寸的 1920x1200 显示器，向下偏移 300 像素以匹配物理布局。最后，我在右侧有一台 1600x1200 的 Cintiq 21UX。
刚刚全新安装了 Ubuntu 11.10，然后运行了所有更新，最后获取了更新的 NVidia 驱动程序。xorg.conf通过 NVidia 实用程序进行配置，然后进行了简单的重命名，这样我就知道我在看什么了。但是，我无法让配置正常工作。我最多只能使用两个显示器，但是当我尝试启用三个显示器时，事情就开始变得奇怪，渲染在错误的位置，幽灵鼠标点击距离实际位置半个屏幕。如果我尝试使用四个显示器，那么 UI 甚至不会出现……只有带有 Nautilus 菜单的桌面，但没有启动器、时钟或其他任何东西。
这是我的xorg.conf文件。有人发现这里有问题吗？我没有发现，而且我已经为此挣扎了八个小时。
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "AppleScreen" 1920 0
Screen 1 "RightGatewayScreen" 4480 300
Screen 2 "CintiqScreen" 6400 900
Screen 3 "LeftGatewayScreen" 0 300
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "1"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Device"
Identifier "VideoCard1A"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8800 GT"
BusID "PCI:2:0:0"
Screen 0
EndSection
Section "Device"
Identifier "VideoCard1B"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8800 GT"
BusID "PCI:2:0:0"
Screen 1
EndSection
Section "Device"
Identifier "VideoCard2A"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8800 GT"
BusID "PCI:1:0:0"
Screen 1
EndSection
Section "Device"
Identifier "VideoCard2B"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8800 GT"
BusID "PCI:1:0:0"
Screen 0
EndSection
Section "Monitor"
Identifier "AppleMonitor"
VendorName "Unknown"
ModelName "Apple Cinema HD"
HorizSync 49.3 - 98.5
VertRefresh 60.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "RightGatewayMonitor"
VendorName "Unknown"
ModelName "Gateway FPD2485W"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "LeftGatewayMonitor"
VendorName "Unknown"
ModelName "Gateway FPD2485W"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "CintiqMonitor"
VendorName "Unknown"
ModelName "WAC Cintiq21UX"
HorizSync 31.0 - 92.0
VertRefresh 56.0 - 85.0
Option "DPMS"
EndSection
Section "Screen"
Identifier "AppleScreen"
Device "VideoCard1A"
Monitor "AppleMonitor"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-0"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "RightGatewayScreen"
Device "VideoCard1B"
Monitor "RightGatewayMonitor"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "DFP-1: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "LeftGatewayScreen"
Device "VideoCard2A"
Monitor "LeftGatewayMonitor"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "DFP: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "CintiqScreen"
Device "VideoCard2B"
Monitor "CintiqMonitor"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "CRT: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
# Tried both enabled and disabled here but to no avail.
Section "Extensions"
Option "Composite" "Disable"
EndSection
更新
有人评论说我不应该让所有四台显示器都绝对定位，但这是完全正确的。如果您的分辨率可以改变，或者只是因为如果您不小心，您可能会无意中导致屏幕重叠或更糟的是，在它们之间产生“无人区”的间隙，从而无法到达，那么建议不要这样做，但这里的情况并非如此。同样，鼠标按预期在所有显示器上移动。此外，即使使用相对定位（例如“LeftOf”，“RightOf”），我仍然遇到同样的问题。
我开始认为是宽度过大导致了这个问题。任何超过 4000 像素宽的东西似乎都会让人厌烦，而我的桌面宽度是 8000 像素。
答案1
听起来您的显示器配置为单独的 X 显示器，而不是一个。您想要的是 TwinView/Xinerama。
也许也可以通过他们的 GUI 工具进行配置。不过我自己从未使用过，所以我不太确定。
Section "ServerLayout"
Identifier "Xinerama"
Screen 0 "Default Screen[0]" 0 0
Screen 1 "Default Screen[1]" LeftOf "Default Screen[0]"
Screen 2 " " Above " "
Screen 3 " " Above " "
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
Option "Xinerama" "on"
EndSection
假设非水平对齐，但从您的配置来看，我假设您确实有水平对齐。它确实使它们作为一个屏幕运行，但通常它不关心它们的大小。至少在水平对齐时。