我在装有 i3 的 Macbook Pro 上运行 Linux，除了 HDMI 端口的外接显示器外，一切都可以正常工作。 xrandr 看到显示器，但当我在 xrandr 中配置它时，显示器仍然显示“无信号”。
有时，当我用笔记本电脑屏幕配置它时，xrandr --output HDMI-0 --auto屏幕会缩小到显示器分辨率，但外接显示器仍然无法打开。
我的 /etc/xorg.conf.d/10-monitor.conf 如下所示：
Selection "Monitor"
Identifier "DP-2"
Option "Primary" "true"
EndSelection
Selection "Monitor"
Identifier "HDMI-0"
Option "Above" "DP-2"
EndSelection
我的xrandr -q输出如下所示：
Screen 0: minimum 8 x 8, current 2880 x 1800, maximum 16384 x 16384
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected (normal left inverted right x axis y axis)
1920x1080 60.00 + 59.94 50.00 60.05 60.00 50.04
1680x1050 59.95
1600x1200 60.00
1440x900 59.89
1280x1024 75.02 60.02
1280x960 60.00
1280x720 60.00 59.94 50.00
1152x864 75.00
1024x768 75.03 70.07 60.00
800x600 75.00 72.19 60.32 56.25
720x576 50.00
720x480 59.94
640x480 75.00 72.81 59.94 59.93
DP-2 connected primary 2880x1800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
2880x1800 59.99*+
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
VGA-1-1 disconnected (normal left inverted right x axis y axis)