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Thread: Multiple monitor setup issues. HDMI works fine but USB-C does not. I have the newest displaylink

  1. #1
    Join Date
    2022-Apr
    Posts
    2

    Question Multiple monitor setup issues. HDMI works fine but USB-C does not. I have the newest displaylink

    71mUt7iJ07L._AC_SX679_.jpg

    So I have one of these for my laptop. It comes with several cables for you to choose from. You can either use HDMI + USB or USB-C to power each monitor. It worked great (literally plug and play) on my Windows laptop, but I'm trying to get it set up on Linux and it just will not display over USB-C.

    https://github.com/AdnanHodzic/displaylink-debian

    I found this while searching and used it to install. I uninstalled the older EVDI version that came in the kernel and now have the latest version.

    I have even tried with a USB-C hub, then using HDMI and USB to connect to it and it doesn't work. It seems to be the USB-C port itself. I know it works because I can use other devices with it and have used this monitor with Windows on the same laptop. Both monitors work if I switch the HDMI-USB cables between them.

    Code:
    └─$dkms status                  
    evdi/1.11.0, 5.16.0-kali7-amd64, x86_64: installed 
    realtek-rtl8814au/5.8.5.1~git20210730.824d1d2, 5.16.0-kali7-amd64, x86_64: installed 
    realtek-rtl88xxau/5.6.4.2~git20211212.3a6402e, 5.16.0-kali7-amd64, x86_64: installed (WARNING! Diff between built and installed module!) 
    virtualbox/6.1.34, 5.16.0-kali7-amd64, x86_64: installed 
                                                                   
    
    It is detected with LSUSB, as well as every device connected to it. It has a USB port, for example, that my XBox controller is plugged into. It shows up as well with that command. I can use my XBox controller with it plugged into the monitor then plugged into the laptop via USB-C but can't render video to the monitor.

    Code:
    $xrandr
    Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384 
    HDMI-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 263mm x 148mm 
       1920x1080     60.02*+  59.96    60.00    50.00    59.94    59.93    24.00    23.98   
       1920x1200     59.88    59.95   
       1600x1200     75.00    70.00    65.00    60.00   
       1680x1050     74.89    69.88    60.02    59.95    59.88   
       1600x1024     60.17   
       1400x1050     74.76    70.00    59.98   
       1600x900      59.94    59.95    59.82   
       1280x1024     75.02    60.02   
       1440x900      60.02    59.89   
       1400x900      59.96    59.88   
       1280x960      60.00   
       1440x810      60.00    59.97   
       1368x768      59.88    59.85   
       1360x768      59.80    59.96   
       1280x800      59.99    60.02    59.97    59.81    59.91   
       1152x864      75.00    75.00    70.00    60.00   
       1280x720      60.00    59.99    59.86    60.00    50.00    59.94    59.74   
       1024x768      75.05    60.04    75.03    70.07    60.00   
       960x720       75.00    60.00   
       928x696       75.00    60.05   
       896x672       75.05    60.01   
       1024x576      59.95    59.96    59.90    59.82   
       960x600       59.93    60.00   
       832x624       74.55   
       960x540       59.96    59.99    59.63    59.82   
       800x600       75.00    70.00    65.00    60.00    72.19    75.00    60.32    56.25   
       840x525       74.96    69.88    60.01    59.88   
       864x486       59.92    59.57   
       720x576       50.00   
       800x512       60.17   
       700x525       74.76    70.06    59.98   
       800x450       59.95    59.82   
       720x480       60.00    59.94   
       640x512       75.02    60.02   
       720x450       59.89   
       700x450       59.96    59.88   
       640x480       60.00    75.00    72.81    75.00    60.00    59.94   
       720x405       59.51    58.99   
       720x400       70.08   
       684x384       59.88    59.85   
       680x384       59.80    59.96   
       640x400       59.88    59.98   
       576x432       75.00    75.00    70.00    60.06   
       640x360       59.86    59.83    59.84    59.32   
       512x384       75.03    70.07    60.00   
       512x288       60.00    59.92   
       416x312       74.66   
       480x270       59.63    59.82   
       400x300       72.19    75.12    60.32    56.34   
       432x243       59.92    59.57   
       320x240       72.81    75.00    60.05   
       360x202       59.51    59.13   
       320x180       59.84    59.32   
    eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm 
       1920x1080     60.02*+  60.01    59.97    59.96    59.93   
       1680x1050     59.95    60.02    59.88   
       1600x1024     60.17   
       1400x1050     59.98   
       1600x900      59.99    59.94    59.95    59.82   
       1280x1024     60.02    60.02   
       1440x900      60.02    59.89   
       1400x900      59.96    59.88   
       1280x960      60.00   
       1440x810      60.00    59.97   
       1368x768      59.88    59.85   
       1360x768      59.80    59.96   
       1280x800      59.99    60.02    59.97    59.81    59.91   
       1152x864      60.00   
       1280x720      60.00    60.02    59.99    59.86    59.74   
       1024x768      60.02    60.04    60.00   
       960x720       60.00   
       928x696       60.05   
       896x672       60.01   
       1024x576      59.95    59.96    59.90    59.82   
       960x600       59.93    60.00   
       960x540       59.96    59.99    59.63    59.82   
       800x600       60.02    60.00    60.32    56.25   
       840x525       60.01    59.88   
       864x486       59.92    59.57   
       800x512       60.17   
       700x525       59.98   
       800x450       59.95    59.82   
       640x512       60.02   
       720x450       59.89   
       700x450       59.96    59.88   
       640x480       60.02    60.00    59.94   
       720x405       59.51    58.99   
       684x384       59.88    59.85   
       680x384       59.80    59.96   
       640x400       59.88    59.98   
       576x432       60.06   
       640x360       59.86    59.83    59.84    59.32   
       512x384       60.00   
       512x288       60.00    59.92   
       480x270       59.63    59.82   
       400x300       60.32    56.34   
       432x243       59.92    59.57   
       320x240       60.05   
       360x202       59.51    59.13   
       320x180       59.84    59.32   
    DVI-I-5-4 disconnected (normal left inverted right x axis y axis) 
    DVI-I-4-3 disconnected (normal left inverted right x axis y axis) 
    DVI-I-3-2 disconnected (normal left inverted right x axis y axis) 
    DVI-I-2-1 disconnected (normal left inverted right x axis y axis) 
                                                
    
    XRandr just shows the internal display and the monitor connected via HDMI. I'm not sure what the DVI things are, honestly.

    I have tried "xrandr --output DVI blah blah --auto" and it didn't help at all.

    ---



    So I'm basically stuck. The monitor will turn on then go into sleep mode and turn back off. Displaylink is its latest version. Everything else works. I just can't get any video output to it.

    Can anyone assist me with this? Thank you in advance.

  2. #2
    Join Date
    2021-May
    Location
    UK
    Posts
    784
    Your using a VM so the USB ports are being virtualised so no GPU acceleration is available via USB ports.

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