Same monitor output identifier for VGA and Mini DP

nomeutente94 · 2021-07-27 10:03:32

Hello everyone,

I got a Lenovo V330-15IKB Notebook, I want to use it with two external monitors (one on VGA out and one on Mini DP) but I can't do it since X detects them as the same output with the same identifier (DP1).

This prevents me from using both Mini DP and VGA at the same time, with Mini DP out having priority over VGA out (if I plug both monitors the only one that works is the Mini DP one). Of course everything works if I plug my monitors on, for example, VGA out and HDMI out.

Is this a matter of configuration or is it an hardware limitation of my laptop? I'm leaving here my xrandr output, thank you.

[rtarullo@robertotarullo ~]$ xrandr
Screen 0: minimum 8 x 8, current 4160 x 1440, maximum 32767 x 32767
eDP1 connected 1600x900+0+540 (normal left inverted right x axis y axis) 340mm x 190mm
   1920x1080     60.01 +  59.93  
   1680x1050     59.95    59.88  
   1400x1050     59.98  
   1600x900      60.00*   59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1368x768      60.00    59.88    59.85  
   1280x800      59.81    59.91  
   1280x720      59.86    60.00    59.74  
   1024x768      60.00  
   1024x576      60.00    59.90    59.82  
   960x540       60.00    59.63    59.82  
   800x600       60.32    56.25  
   864x486       60.00    59.92    59.57  
   640x480       59.94  
   720x405       59.51    60.00    58.99  
   640x360       59.84    59.32    60.00  
DP1 connected primary 2560x1440+1600+0 (normal left inverted right x axis y axis) 600mm x 340mm
   2560x1440     59.95 + 144.01*  120.00    99.95  
   3840x2160     60.00    50.00    59.94  
   1920x1080    120.00   119.88    60.00    60.00    50.00    59.94    30.00    29.97  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1440x576      50.00  
   1024x768      75.03    70.07    60.00  
   1440x480      60.00    59.94  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

Last edited by nomeutente94 (2021-07-27 10:04:25)

progandy · 2021-07-27 10:13:59

This is a hardware limitation, lenovo probably added a DP to VGA converter that connects to the same displayport interface.

By the way, if the mini-dp supports MST, then you could use an MST Hub and connect both monitors to that (maybe with an adapter cable for the VGA one)

Last edited by progandy (2021-07-27 10:52:08)

Arch Linux

#1 2021-07-27 10:03:32

Same monitor output identifier for VGA and Mini DP

#2 2021-07-27 10:13:59

Re: Same monitor output identifier for VGA and Mini DP

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