iPhone XS Max Auto-Brightness Glitch

Discussion in 'iPhone' started by leftcoastnomad, Oct 27, 2018.

  1. leftcoastnomad, Oct 27, 2018
    Last edited: Oct 30, 2018

    leftcoastnomad macrumors newbie

    Oct 3, 2018
    When I slowly move the brightness slider (accessed either from Settings or Control Center) across the ~20% brightness point, either going from dim to bright, or bright to dim, there is a sharp non-linear increase/decrease in brightness.

    This also happens when auto-brightness moves the brightness level past this ~20% point (either going up or down in brightness) - there is that sudden increase/decrease "jump" in the brightness level.

    Where I naturally use the phone, this happens quite a lot as the phone seems to operate right around that level, and my brightness occasionally "jumps" while I'm reading. It almost looks like a brief flicker.

    I did return the original XS Max for this issue and noticed it happened on the replacement as well. I figured it was a software issue - but now with iOS 12.1 beta 5, its still happening.

    Is this happening for anyone else?

    Issue discussed elsewhere:

  2. Brad Smith macrumors regular

    Oct 13, 2003
    Vancouver, BC, Canada
    Yes, and I’ve been through two iPhone XS models. It’s especially noticeable when watching video and manifests as a pretty obnoxious flicker about once per second
  3. leftcoastnomad thread starter macrumors newbie

    Oct 3, 2018
    Becauae auto brightness adjusts somewhat slowly I’m not sure this is something you would see once a second. Under normal usage in the right (or wrong) amount of ambient light it happens once every few minutes at most.

    Aside from my two devices, one other person on this forum noted this issue with his XS Max. Very surprised 12.1 beta 5 didn’t fix it.

    I’m starting to think I have defective hardware as a glitch this prominent would probably have a 100+ page thread here if everyone had it.
  4. leftcoastnomad thread starter macrumors newbie

    Oct 3, 2018

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3 October 27, 2018