将 MST 流监视器合并为一个虚拟

Question

我正在使用一台 PQ321QE 和两台 U2412M。不幸的是，我用作主屏幕的 PQ321QE 在 SST 模式下仅支持 30Hz，因此我被迫在 MST 模式下使用它。我现在遇到的问题是 PQ321QE 内部有两个独立的屏幕：

我怎样才能将这些分屏合并为一个虚拟屏幕，以便最大化窗口覆盖两个屏幕？

一些调试信息：

• nVidia 驱动程序
• Ubuntu 15.10
• 内核 4.2.0-18

xrandr 输出：

Screen 0: minimum 8 x 8, current 6960 x 2160, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
   1920x1200     59.95*+
   1920x1080     60.00  
   1680x1050     59.95  
   1600x1200     60.00  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.00  
   800x600       60.32  
   640x480       59.94  
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 1200x1920+5760+0 left (normal left inverted right x axis y axis) 518mm x 324mm
   1920x1200     59.95*+
   1920x1080     60.00  
   1680x1050     59.95  
   1600x1200     60.00  
   1280x1024     60.02  
   1280x960      60.00  
   1024x768      60.00  
   800x600       60.32  
   640x480       59.94  
DP-1 disconnected (normal left inverted right x axis y axis)
DP-1.8 connected 1920x2160+1920+0 (normal left inverted right x axis y axis) 349mm x 393mm
   1920x2160     60.00*+  50.00  
   1920x1200     59.95  
   1920x1080     60.00    59.94    50.00    23.97    60.00    50.04  
   1680x1050     59.95  
   1600x1200     60.00  
   1440x900      59.89  
   1400x1050     59.98  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1280x800      59.81  
   1280x720      60.00    59.94    50.00  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   720x576       50.00    50.08  
   720x480       59.94    60.05  
   640x480       75.00    72.81    59.94  
DP-1.1.8 connected 1920x2160+3840+0 (normal left inverted right x axis y axis) 349mm x 393mm
   1920x2160     60.00*+
   1680x1050     59.95  
   1600x1200     60.00  
   1440x900      59.89  
   1400x1050     59.98  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1280x800      59.81  
   1280x720      60.00  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   640x480       75.00    72.81    59.94