Dual Screen horizontal lines and tearing.

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  1. Posts : 19,516
    W11+W11 Developer Insider + Linux
       #11

    Do this check (if you didn't already): Make a screen shot and look at the picture. If there are no lines on it than its up to GPU, cable or monitor itself. If you can see lines that it could be because of drivers or system.
    In safe mode 3D section and processor are not working, only 2D which is separate processor.
      My Computers


  2. Posts : 2,716
    Windows 10
       #12

    That maybe in some way related to the use of a VGA connection. The vertical sync is not quite right in the bottom half of the screen.

    An old-un like me has seen that sort of thing countless times on older analogue TVs, round the back and twiddle the vertical hold.

    At least that's what your picture looks like. I don't call that tearing.

    The VGA connection is now legacy, so whether your video Card or driver application, and/or VGA to DVI adapter has facilities for changing timing I would not know.

    The cable quality matters more for VGA, try changing that particular length though that maybe next to zero depending on where the adapter is.

    That's all I know. Just throwing out ideas that have not been mentioned.
      My Computer


  3. Posts : 65
    Windows 10 Home Version 1909 (OC Build 18363.592)
       #13

    Helmut said:
    That maybe in some way related to the use of a VGA connection. The vertical sync is not quite right in the bottom half of the screen.

    An old-un like me has seen that sort of thing countless times on older analogue TVs, round the back and twiddle the vertical hold.

    At least that's what your picture looks like. I don't call that tearing.
    I scond Helmut. I had a lot of horizontal rippling and flickering especially while middle-wheel scrolling. I tried uninstalling the graphics card driver... but there was no such effect on the duplicated display. Finally I got off my butt and actually undid the VGA connction on the monitor and plugged in the HDMI cable from the laptop. No flickering while scrolling. So I thought, well, it's not the monitor. Then I plugged the VGA back in to the problematic desktop and boom, no rippling, no scrolling.

    I'm not sure what the cause was. I had the disply hooked up when I went from Windows 7 to Windows 10 and it just got worse over time. It just needed uncoupling for some reason. It couldn't hurt to try it.
    The VGA connection is now legacy, so whether your video Card or driver application, and/or VGA to DVI adapter has facilities for changing timing I would not know.

    The cable quality matters more for VGA, try changing that particular length though that maybe next to zero depending on where the adapter is.

    That's all I know. Just throwing out ideas that have not been mentioned.
    I'm with Helmut. I found rippling and flickering but none on an external display. Then I uncoupled the monitor's VGA cable and coupled my laptop's HDMI cable and... no flickering. Not the graphics card, not the hardware, hmm... But I hooked the VGA cable up and, presto! No flickering. Don't understand why.
      My Computers


 

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