Arch Linux

TorbenJ

Member

Registered: 2016-01-05

Posts: 5

[Resolved] Second monitor no longer detected

Hello everyone,
I just installed Arch Linux and after installing all necessary packages to run my WM I noticed that my second monitor doesn't get detected.
I have the same problem sometimes when running Windows 10 but I thought it might be just a software problem but after experiencing the same issue on Arch Linux I just want to find out the reason.

I found many many posts about issues with multi-monitor setups on the web but I couldn't find anything yet to solve mine.
First of all I used nvidia-settings to try to enable the second display but nvidia-settings doesn't detect it.
Then I tried to reconnect both displays to check if there was any faulty connection. Nothing.
Next I ran the following command:

xrandr -q

And I got the following result:

Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected primary (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 530mm x 300mm
   1920x1080     60.00*+  59.94    50.00    60.05    60.00    50.04  
   1680x1050     59.95  
   1440x900      59.89  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1280x800      59.81  
   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    50.08  
   720x480       59.94    60.05  
   640x480       75.00    72.81    59.94    59.93  
DP-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)

So the first display is connected to HDMI-0 as you can see, the second one is attached to one of the DVI ports. I already tried to connect it to the other DVI port, too. No success.

Under Windows I can get it working just fine. Sometimes it is disabled after bootup, too, but I can get Windows to detect it. Sometimes it takes longer than other times but it is possible.
I don't know what the reason is.
If it is the graphics card then I wouldn't expect it to work just fine after getting the second display up again (it doesn't go down again afterwards).
The same with the display itself. If it is enabled it works fine without any weird behaviour.
I don't have another DVI cable right now so I might check this too after buying another one.

How can I narrow down the reason for this behaviour?

Edit: It seemed to be a cable-related issue. Just turned around the cable and it is working now.

Last edited by TorbenJ (2016-02-18 15:00:45)