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HDMI Display not working for Ultra96V2 board

darshancg

Hi Team,

Actually, my Ultra 96 v2 board is not able to connect to the Display monitor. I had tested with Active and Passive Mini-DP to HDMI Converter, but it is not working. I had also tested with 2 HDMI Monitors, but still the same.
I am using DPU Image for the Ultra96v2 board.
Can anyone help me to resolve this issue? Would be a great help from your side.
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Thanks,
Darshan
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  • Darshan,

     

    Can you be more precise about which image you are using ?

    Is it one of the Vitis-AI images from AlbertaBeef's projects ?

    If yes, which one : Vitis-AI 1.0, 1.1, 1.2, 1.3 ?

     

    First, the fact that "xrandr --query" is reporting 1024x768 (the default setting),

    may indicate that the U96V2 did not "see" the DP monitor.
    Some monitors which have multiple inputs, disable the unused connectors.Are you able to "select" the DP input you are using with the monitor's menu buttons or

     

    For reference, here is what I get with my Vitis-AI 1.3 image:

     

    After powering up Ultra96-V2, I get the same as you :

       root@u96v2-sbc-base-2020-2:~# export DISPLAY=:0.0

       root@u96v2-sbc-base-2020-2:~# xrandr --query

       Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096

       DP-1 disconnected primary

       root@u96v2-sbc-base-2020-2:~#

     

    After selecting the DP input on my monitor with the monitor's menu buttons,

    I can see some verbose on the serial console (you may not see this verbose in your putty console)

       [  117.335480] Console: switching to colour frame buffer device 480x135

       [  117.341928] zynqmp-display fd4a0000.zynqmp-display: fb0: xlnxdrmfb frame buffer device

     

    Also, I can see the chromium browser appear on the monitor.

     

    Re-trying the xrandr query, now returns:

       root@u96v2-sbc-base-2020-2:~# xrandr --query

       Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 4096 x 4096

       DP-1 connected primary 1920x1080+0+0 607mm x 345mm

          1920x1080     60.00*+  59.94

          3840x2160     30.00    29.97

          2560x1440     59.95

          1680x1050     59.95

          1600x900      60.00

          1280x1024     75.02    60.02

          1440x900      59.89

          1280x800      59.81

          1152x864      75.00

          1280x720      60.00    59.94

          1024x768      75.03    70.07    60.00

          832x624       74.55

          800x600       72.19    75.00    60.32    56.25

          640x480       75.00    72.81    66.67    60.00    59.94

          720x400       70.08

       root@u96v2-sbc-base-2020-2:~#

     

    Regards,

     

    Mario (AlbertaBeef)

  • in reply to albertabeef

    Hi there,

     

    To expand on this, it might be helpful to check out this thread:

    Ultra96-v2 mini-DP to HDMI adapter

     

    It has links to an accessory page where we have tested known good adapters.  Not all adapters work with the Ultra96v2.

    It also has some troubleshooting tips and tricks - very similar to what Mario posted above.

     

    --Dan

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