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Joined 2 years ago
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Cake day: July 1st, 2023

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  • I get something like what you’re describing with my M3 Air when using an Anker 555 hub to connect to an external monitor via HDMI. Most of the time it’s fine, but occasionally I will get a distortion/interference effect on the external screen, kind of like rolling horizontal bars or flickering. Sometimes quite subtle, other times very distracting.

    I’ve tried swapping out cables and repositioning devices in various configurations: it’s not the cables, and other devices don’t exhibit the same issue when displaying through the same hub.

    I’ve also noticed that certain patterns onscreen cause it to happen more easily - checkerboards and fine diagonal stripes in particular. Very odd, and means there are some websites and apps that can semi-reliably trigger it.

    I almost wonder if it’s something to do with how macOS is scaling the image for the display, and that not playing nice with the hub’s HDMI encoder for some reason?