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Question about screen distortion on external monitor. (lemmy.dbzer0.com)

submitted 3 days ago by neon_nova@lemmy.dbzer0.com to c/apple_enthusiast@lemmy.world

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I use a windows computer for work with a usb-c to HDMI hub.

I needed to use my wife’s m1 air, and there was weird distortion on the screen. It was minimal, but noticeable.

I read that this can be a problem with m1 and m2 air models. I plan to get an m4 air in the next few months and I’m wondering if this model has any screen distortion problems on an external monitor.

I do not have distortion problems with any of my other computers using the same hub and wires, so I don’t think it’s a problem with them.

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[–] fuckwit_mcbumcrumble@lemmy.dbzer0.com 2 points 3 days ago (3 children)

What kind of distortion? So you have a picture?

Is it blurry? Are there digital artifacts randomly? Does it just blank out then come back?

[–] neon_nova@lemmy.dbzer0.com 1 points 3 days ago (2 children)

It’s a hard to describe, but it’s like faint lines running through the display horizontally. Hard to see on dark backgrounds.

[–] MurrayL@lemmy.world 2 points 3 days ago* (last edited 3 days ago)

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?

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