显示器在启动时未唤醒

显示器在启动时未唤醒

我有两个显示器(都是戴尔u2515);它们通过菊花链电缆连接到主板,均为 DP 1.2,但我无法让两台显示器在启动时唤醒。

直接连接的显示器在启动操作系统时处于睡眠状态(曼扎罗,Linux 4.14),但是由此菊花链连接的一个按预期唤醒。

他们都可以使用以下方法强制唤醒:

xset -display :1 dpms force off

这会导致两者进入睡眠状态,并在按键时成功唤醒。

DP 1.2 在连接到主板的显示器上启用,在另一台显示器上禁用。

这可能与多显示器有关吗?在 Linux 或特定的菊花链 DP 下

XRandR 输出:

Screen 0: minimum 320 x 200, current 5120 x 1440, maximum 16384 x 16384
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DVI-D-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 553mm x 311mm
   2560x1440     59.95*+
   2048x1152     60.00  
   1920x1200     59.88  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1600x1200     60.00  
   1680x1050     59.95  
   1280x1024     75.02    60.02  
   1200x960      59.99  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
DP-3 connected 2560x1440+2560+0 (normal left inverted right x axis y axis) 553mm x 311mm
   2560x1440     59.95*+
   2048x1152     60.00  
   1920x1200     59.88  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1600x1200     60.00  
   1680x1050     59.95  
   1280x1024     75.02    60.02  
   1200x960      59.99  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08 

谢谢

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