Lightroom Mobile: iPhone screen dims

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  • Updated 4 months ago
  • (Edited)
This happened with my iPhone 8 Plus and now with my iPhone 11 Pro: sometimes when taking photos and sometimes when editing, the screen dims to less than half brightness. A few minutes later it will brighten again. It can’t be that the phone is under-powered for the app (?).
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luxBorealis

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  • concerned

Posted 4 months ago

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Peter Obermeier

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Hi luxBorealis, I am sure that your iPhone is not underpowered, because I have not seen the described effect on my iPhone 7 and not on my iPhone 11 PRO.
Please check the iPhone display settings. Change the display time our time to never just for test reasons
Or check the auto display brightness.
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Nzswedespeed

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I have the same issue with my 7plus & iPad Pro 12.9" 2nd gen. I have read else where that it is the device reducing the display to limit heat (a form of throttling). I witness then when working on raw files (50mb Fuji RAF) or 4k video files
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Peter Obermeier

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Oh, that is interesting. I have this iPad type as well and , I am working with Fuji RAF files and have never seen this effect. Please tell me what you are processing, then I try to replicate it. This is helping Adobe or Apple to fix it. If it is really an overload protection then all is fine for time being, but Adobe should look into it to improve their code.
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Nzswedespeed

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4k video files in Lumafusion does the trick after 15min or so. But when I import the Raf files directly into LR mobile (via the camera roll using the camera connection kit) after editing 2 dozen or so photos the display often dims. I do have a case on my iPad pro which may be holding the heat in. Do you have a case on yours? 
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Peter Obermeier

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Hi Nzswedespeed, yes I have a case for my iPad Pro, but it is not a closed one, the sides are open and the back is fixed only in the middle, therefore the air can flow. This system is called reboon and I am not sure if it is available internationally.
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Rikk Flohr, Official Rep

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The behavior you describe is likely iOS overheat protection kicking in. Get an ice pack and hold it against the back of your phone to test. If the dimming disappears you know your iPhone is overheating. 
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Peter Obermeier

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Have done a little test and imported 35 Fuji RAW with 50MB each, then edited via batch functionality. All with full brightness and nothing unusual happen. LR mobile is dimming the background while batch edit while the foreground text is bright. But I guess I have to do that with thousands of pictures. It would be interesting to hear more details about the picture processing and how many are processed via batch.