我在运行 Ubuntu 20.04.6 LTS 的 Dell T630 服务器机器上安装了 AMD Radeon Pro WX 3100。我有一台显示器通过 VGA 连接到主板，还有另一台显示器通过 DisplayPort 电缆连接到 GPU。
我xrandr在终端上运行，它只显示一个监视器：
VGA-1 connected primary 1920x1200+0+0。
我研究了现有的 GPU，机器确实识别了 GPU。
lspci | grep VGA
04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Lexa XT [Radeon PRO WX 3100]
09:00.0 VGA compatible controller: Matrox Electronics Systems Ltd. G200eR2 (rev 01)
连接到 GPU 的显示器仅在我关闭或重新启动时显示，除此之外它会进入“省电模式”。我尝试了解决方案海报这里但我得到了错误kernelstub
如何同时使用两台显示器？
编辑1：
sudo lshw -C video
*-display
description: VGA compatible controller
product: Lexa XT [Radeon PRO WX 3100]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:04:00.0
logical name: /dev/fb0
logical name: /dev/fb1
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom fb
configuration: depth=32 driver=amdgpu latency=0 mode=1920x1080 visual=truecolor xres=1920 yres=1080
resources: iomemory:3800-37ff iomemory:3810-380f irq:139 memory:38000000000-380ffffffff memory:38100000000-381001fffff ioport:2000(size=256) memory:91d00000-91d3ffff memory:91d60000-91d7ffff
*-display
description: VGA compatible controller
product: G200eR2
vendor: Matrox Electronics Systems Ltd.
physical id: 0
bus info: pci@0000:09:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm vga_controller bus_master cap_list rom
configuration: driver=mgag200 latency=0 maxlatency=32 mingnt=16
resources: irq:17 memory:90000000-90ffffff memory:91800000-91803fff memory:91000000-917fffff memory:c0000-dffff
编辑2：
xrandr
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 4096 x 4096
VGA-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm
1920x1200 59.95*+
1600x1200 60.00
1680x1050 59.95
1280x1024 75.02 60.02
1152x864 75.00
1024x768 75.03 60.00
800x600 75.00 60.32
640x480 75.00 59.94
xrandr --listproviders
Providers: number : 2
Provider 0: id: 0x41 cap: 0x0 crtcs: 1 outputs: 1 associated providers: 0 name:modesetting
Provider 1: id: 0x75 cap: 0x6, Sink Output, Source Offload crtcs: 5 outputs: 3 associated providers: 0 name:AMD Radeon Pro WX3100 @ pci:0000:04:00.0