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如何选择 AMD 显卡作为 Ubuntu 16.04 的默认显卡？

tag-icon • tag-icon graphics xorg amd-graphics xorg.conf
如何选择 AMD 显卡作为 Ubuntu 16.04 的默认显卡？

语境

我花了一些时间解决这个问题，但现在我陷入了困境。当我检查输出时lspci，我发现我有两个可能的 VGA 控制器：

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] (rev ff) (prog-if ff)

现在似乎只选择了默认的英特尔处理器显卡。运行 也证实了这一点lshw -c display，结果如下：

*-display               
   description: VGA compatible controller
   product: 2nd Generation Core Processor Family Integrated Graphics Controller
   vendor: Intel Corporation
   physical id: 2
   bus info: pci@0000:00:02.0
   version: 09
   width: 64 bits
   clock: 33MHz
   capabilities: vga_controller bus_master cap_list rom
   configuration: driver=i915 latency=0
   resources: irq:36 memory:c0000000-c03fffff memory:b0000000-bfffffff ioport:6000(size=64)

现在来谈谈问题

这就是为什么我决定尝试在系统中创建自定义 xorg.conf 文件，以便能够直接将显卡分配给显示器。但是，当我使用此文件启动 Ubuntu 时/usr/share/X11/xorg.conf.d，我收到一个错误，我不知道如何解决。

该文件的内容如下：

Section "ServerLayout"
    Identifier "amd-layout"
    Screen 0 "amd-screen" 0 0
EndSection

Section "Device"
    Identifier "amd-device"
    Driver "radeon"
    BusID "PCI:1:0:0"
EndSection

Section "Device"
    Identifier "intel"
    Driver "intel"
    Option "AccelMethod" "uxa"
    BusID "PCI:0@0:2:0"
EndSection

Section "Monitor"
    Identifier "amd-monitor"
    Option "VendorName" "ATI Proprietary Driver"
    Option "ModelName" "Generic Autodetecting Monitor"
    Option "DPMS" "true"
EndSection

Section "Screen"
    Identifier "amd-screen"
    Device "amd-device"
    GPUDevice "intel"
    Monitor "amd-monitor"
    DefaultDepth 24
    SubSection "Display"
        Viewport   0 0
        Depth     24
    EndSubSection
EndSection

/var/log/Xorg.0.log错误的读数是：

[    41.323] (EE) Screen(s) found, but none have a usable configuration.
[    41.323] (EE) 
Fatal server error:
[    41.323] (EE) no screens found(EE) 
[    41.323] (EE) 
Please consult the The X.Org Foundation support 
  at http://wiki.x.org
  for help. 
[    41.323] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[    41.323] (EE) 
[    41.326] (EE) Server terminated with error (1). Closing log file.

我感觉我在创建xorg.conf文件时可能搞错了，但我不知道在哪里？你看到那里有错误吗？

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