Set up Dual 4K displays on G4ad instances - Amazon Elastic Compute Cloud
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Set up Dual 4K displays on G4ad instances

Launch a G4ad instance

  1. Connect to your Linux instance to get the PCI Bus address of the GPU you want to target for dual 4K (2x4k):

    lspci -vv | grep -i amd

    You will get output similar to the following:

    00:1e.0 Display controller: Advanced Micro Devices, Inc. [*AMD*/ATI] Device 7362 (rev c3)
Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Device 0a34

  2. Note the PCI bus address is 00:1e.0 in the above output. Create a file named /etc/modprobe.d/amdgpu.conf and add:

    options amdgpu virtual_display=0000:00:1e.0,2

  3. Follow the instructions here to install the AMD drivers on Linux. If you already have the AMD GPU driver installed, you will need to rebuild the amdgpu kernel modules through dkms.

  4. Use the below xorg.conf file to define the dual (2x4K) screen topology and save the file in /etc/X11/xorg.conf:

    ~$ cat /etc/X11/xorg.conf
Section "ServerLayout"
    Identifier     "Layout0"
    Screen          0 "Screen0"
    Screen        1 "Screen1"
    InputDevice     "Keyboard0" "CoreKeyboard"
    InputDevice     "Mouse0" "CorePointer"
    Option          "Xinerama" "1"
EndSection
Section "Files"
    ModulePath "/opt/amdgpu/lib64/xorg/modules/drivers"
    ModulePath "/opt/amdgpu/lib/xorg/modules"
    ModulePath "/opt/amdgpu-pro/lib/xorg/modules/extensions"
    ModulePath "/opt/amdgpu-pro/lib64/xorg/modules/extensions"
    ModulePath "/usr/lib64/xorg/modules"
    ModulePath "/usr/lib/xorg/modules"
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"
    Identifier     "Virtual"
    VendorName     "Unknown"
    ModelName      "Unknown"
    Option         "Primary" "true"
EndSection

Section "Monitor"
    Identifier     "Virtual-1"
    VendorName     "Unknown"
    ModelName      "Unknown"
    Option         "RightOf" "Virtual"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "amdgpu"
    VendorName     "AMD"
    BoardName      "Radeon MxGPU V520"
    BusID          "PCI:0:30:0"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "amdgpu"
    VendorName     "AMD"
    BoardName      "Radeon MxGPU V520"
    BusID          "PCI:0:30:0"
EndSection

Section "Extensions"
    Option         "DPMS" "Disable"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Virtual"
    DefaultDepth   24
    Option         "AllowEmptyInitialConfiguration" "True"
    SubSection "Display"
        Virtual    3840 2160
        Depth      32
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Virtual"
    DefaultDepth   24
    Option         "AllowEmptyInitialConfiguration" "True"
    SubSection "Display"
        Virtual    3840 2160
        Depth      32
    EndSubSection
EndSection

  5. Set up DCV by following the instructions in setting up an interactive desktop.

  6. After the DCV set up is complete, reboot.

  7. Confirm that the driver is functional:

     dmesg | grep amdgpu

    The response should look like the following:

    Initialized amdgpu

  8. You should see in the output for DISPLAY=:0 xrandr -q that you have 2 virtual displays connected:

    ~$ DISPLAY=:0 xrandr -q
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
Virtual connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
 4096x3112  60.00
 3656x2664  59.99
 4096x2160  60.00
 3840x2160  60.00
 1920x1200  59.95
 1920x1080  60.00
 1600x1200  59.95
 1680x1050  60.00
 1400x1050  60.00
 1280x1024  59.95
 1440x900 59.99
 1280x960 59.99
 1280x854 59.95
 1280x800 59.96
 1280x720 59.97
 1152x768 59.95
 1024x768 60.00 59.95
 800x600  60.32 59.96 56.25
 848x480  60.00 59.94
 720x480  59.94
 640x480  59.94 59.94
Virtual-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm
 4096x3112  60.00
 3656x2664  59.99
 4096x2160  60.00
 3840x2160  60.00
 1920x1200  59.95
 1920x1080  60.00
 1600x1200  59.95
 1680x1050  60.00
 1400x1050  60.00
 1280x1024  59.95
 1440x900 59.99
 1280x960 59.99
 1280x854 59.95
 1280x800 59.96
 1280x720 59.97
 1152x768 59.95
 1024x768 60.00 59.95
 800x600  60.32 59.96 56.25
 848x480  60.00 59.94
 720x480  59.94
640x480  59.94 59.94

  9. When you connect into DCV, change the resolution to 2x4K, confirming the dual monitor support is registered by DCV.

    DCV resolution changes