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双显示器仅在设置为不同分辨率时才在 Ubuntu 16.04.1 Gnome 中工作（AMD R9 380）

tag-icon • tag-icon drivers multiple-monitors ubuntu-gnome amd-graphics
双显示器仅在设置为不同分辨率时才在 Ubuntu 16.04.1 Gnome 中工作（AMD R9 380）

我有一台 DVI + HDMI 双显示器，配备 AMD Radeon R9 380。但是我无法同时以最大分辨率使用两台显示器。一台显示器可以以最大分辨率使用，另一台则必须使用不同的分辨率。如果我将它们设置为相同的分辨率，其中一个屏幕会空白，但似乎仍在接收信号，因为它不会关闭。

以下是 lshw -c video 的输出

crawforc3@ubuntu:~$ sudo lshw -c video
  *-display               
       description: VGA compatible controller
       product: Tonga PRO [Radeon R9 285/380]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:01:00.0
       version: f1
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=amdgpu latency=0
       resources: irq:128 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:f7e00000-f7e3ffff memory:f7e40000-f7e5ffff

xrandr 的输出

crawforc3@ubuntu:~$ xrandr
Screen 0: minimum 320 x 200, current 3600 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected 1680x1050+1920+30 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00 +  50.00    59.94    30.00    29.97  
   1920x1080i    60.00    50.00    59.94  
   1680x1050     59.88* 
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1440x576      50.00  
   1024x768      75.08    70.07    60.00  
   1440x480      60.00    59.94  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    66.67    60.00    59.94  
   720x400       70.08  
DVI-D-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080     60.00 +  50.00    59.94*   30.00    29.97  
   1920x1080i    60.00    50.00    59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x960      60.00  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1440x576      50.00  
   1024x768      75.08    70.07    60.00  
   1440x480      60.00    59.94  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    66.67    60.00    59.94  
   720x400       70.08

以及 ~/.config/monitors.xml 的内容

<monitors version="1">
  <configuration>
    <clone>no</clone>
    <output name="DVI-I-1">
      <vendor>ACI</vendor>
      <product>ASUS VN248</product>
      <serial>ECLMTF168617</serial>
      <width>1920</width>
      <height>1080</height>
      <rate>59.940200805664062</rate>
      <x>0</x>
      <y>0</y>
      <rotation>normal</rotation>
      <reflect_x>no</reflect_x>
      <reflect_y>no</reflect_y>
      <primary>yes</primary>
      <presentation>no</presentation>
      <underscanning>no</underscanning>
    </output>
    <output name="HDMI-A-0">
      <vendor>ACI</vendor>
      <product>ASUS VN248</product>
      <serial>ECLMTF168622</serial>
      <width>1680</width>
      <height>1050</height>
      <rate>59.883251190185547</rate>
      <x>1920</x>
      <y>30</y>
      <rotation>normal</rotation>
      <reflect_x>no</reflect_x>
      <reflect_y>no</reflect_y>
      <primary>no</primary>
      <presentation>no</presentation>
      <underscanning>no</underscanning>
    </output>
  </configuration>
</monitors>

答案1

AMD 与 Ubuntu 16.x 配合得不好。你今天最好的选择很遗憾是降级到 14.04 LTS（仍然需要相当长几年的支持）直到你的计算机死机然后购买一台对 Ubuntu 具有更好的硬件加速支持。

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