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  1. #1
    ROG Junior Member Array
    Join Date
    Oct 2021
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    4

    problematic DisplayPort output during UEFI/BIOS/POST screens

    It is unclear if the issue is ultimately a graphics card issue, monitor issue or motherboard issue but it's certainly an interaction of components, all of which are ASUS:
    Motherboard: rog-strix-z590-e-gaming-wifi
    Graphics Card: rog-strix-rtx3060-o12g-v2-gaming
    Monitor: VG248QG

    Relevant configuration is that the monitor be connected via display port to graphics card.
    Relevant UEFI configuration is that compatibility support modules is off.
    It happens with two different VG248QC monitors.
    It does not happen with HDMI output (this makes displayport relevant)
    It does not happen with monitors connected to motherboard displayport output. (this seems to make the graphics card relevant)
    It does not happen with a HP 24mh monitor. (this is the factor that makes the monitor relevant)

    During the problematic output, the monitor indicates it is getting a 640x3321@14Hz signal
    In this configuration, the display output during the UEFI/BIOS/POST screens is incorrect but once the Windows driver takes over, it is fine.

    So far Asus support keeps giving me canned responses like updating drivers... that are absolutely irrelevant.

    Example problematic output where you see the ASUS/ROG Post logo tiled several times across the screen instead of one clear image.

    Click image for larger version. 

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