UDOO QUAD not working in DVI mode

Discussion in 'UDOO QUAD' started by kstearns, Sep 27, 2020.

  1. kstearns

    kstearns New Member

    Feb 15, 2018
    Likes Received:
    I opened a UDOO support ticket, but it's been sitting for more than a week with no response so I thought I would try here.

    In short, when connecting UDOO QUAD to older DVI display devices, it doesn't work properly - display flickers and reports an (invalid) pixel clock rate of 173Mhz. Attaching our video signal analyzer tells us that the TMDS Format = HDMI, not DVI.

    When I use a Raspberry Pi (or really any device except UDOO), the analyzer reports TMDS Format = DVI with correct timings and the display works properly, reporting (correctly) 148.5Mhz pixel clock.

    I've tried all of the UDOO patches/changes I could find, but nothing helps.

    NXP imx6 boards from other manufacturers seem to allude to some DVI_mode flag that can force imx6 output to DVI format, but those appear to be board/manufacturer-specific.

    Has anyone had success getting this to work with older (non-HDMI) DVI-only displays ?
  2. evaloverde

    evaloverde Administrator Staff Member

    Apr 29, 2019
    Likes Received:
    Ciao K,
    thank you for reaching out. Could you please let me in know in private your ticket number? Thanks

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