Need some help with display timings/blanking intervals to move a tear off-screen

Discussion in 'Displays' started by GoldenOne, Nov 2, 2018.

  1. GoldenOne

    GoldenOne n00b

    Messages:
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    Joined:
    Nov 2, 2018
    Heyo!

    I am in need of some help regarding monitor timings/blanking intervals.

    Specifically, how to move the blanking interval. Because right now instead of the frame starting at the top/bottom of the vertical area, its starting/ending in the middle. Resulting in an image like this:

    https://thegoldenone.co.uk/0587979320.png

    My current issue is this: I have a display, and a capture card, cloned together with the display at 120hz and the capture card at 60hz.
    Settings are as shown:

    Monitor: https://thegoldenone.co.uk/0469930223.png
    Capture Card: https://thegoldenone.co.uk/8418084220.png

    The timings are synced perfectly, which means I'm getting a perfectly smooth video to both the display and capture card, BUT, on the capture card, I have a stationary tear in the centre of the screen, as shown here:

    https://clips.twitch.tv/AwkwardDelightfulPeanutYouDontSay

    If the timings were out, then the tear would be moving.

    So I think i'm close to getting this working perfectly.
    Does anyone know, what should I change/adjust in order to move this tear off screen into the "porch" or "sync" area? (I have limited understanding of this but this document explained it quite well http://www.analogway.com/files/uploads/white-papers/wp-custom-formats-082714(8).pdf )

    If anyone can help me out with this that would be awesome.

    Additional info:

    Monitor: Acer x34p @120hz (gsync disabled)
    Capture Card: Elgato 4k60 pro
    GPU: Nvidia 1080ti

    Monitor is running over displayport
    Capture card is running over HDMI 2.0