External camera laggy - low frame rate

I've just upgraded from a 2018 MacBook Pro to the MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports).

When using the Mac's FaceTime camera, everything works fine. However, when connecting it to my LG UltraFine 5K (as I was my previous Mac), the camera feed is laggy (in every application).


The frame rate is really low and erratic - ranging from one frame per second to even fewer.


My previous Mac worked fine with the same monitor.


I've tried:

Using a different Thunderbolt port on the Mac to connect to the display.

Resetting the Mac's PRAM and SMC.

Creating and testing with a new user.

Reinstalling 10.15.4.

Checking for firmware updates for the external display.


all to no avail.


I can't seem to fix the issue, nor can I find any suitable help online.


Any thoughts are appreciated.



Posted on May 19, 2020 8:46 AM

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213 replies

Jul 16, 2020 4:44 AM in response to GoldsteinPC

Indeed. It's been particularly tough, especially during lockdown where I would've liked to have used my monitor's camera to keep in touch with friends and family.


Since my first post where I went through steps to attempt to diagnose the issue myself, my experience so far with Apple has been as follows:


I reported this to Apple, and have had various members of support contact me. Some support staff connected remotely to my Mac and ran some diagnostic tools and collected logs.


I was then asked if I could return my Mac to Apple so they can check my hardware, but they told me that they wouldn't be able to get me a replacement, and that I'd have to order a new Mac and wait for it to be delivered. As I don't want to be without my Mac, I asked if they could perhaps instead just replicate the same setup as ours to diagnose, but I was told that this will likely not help as they seemed to be convinced this issue existed only with my Mac.


I asked if they could at least try, and even told them about this thread, but I've since stopped receiving replies.


It's all been quite frustrating, and it appears that no one is currently working on this. Again, this has particularly come at a bad time where reliance on my Mac my setup's webcam has been particularly crucial.

Jul 29, 2020 2:24 PM in response to J Michael

J Michael - doing the same and it "works", but it's also total BS to be dealing with on a $3k MBP using their recommended $1300 monitor. Support is impossible, so clueless. I asked if they had this logged as a known issue, and rep told me "they don't have a database like that". I'm sure they do, but just don't trust tier 1 support reps enough to let them see it. I'll be downgrading to my old MBP as soon as repair is done, and returning this one. Last support rep said it must just be my machine because Apple has really good QA people. I pointed out this thread, and it was like watching a computer glitch - that Apple might have a bug didn't fit his belief system.

Jul 29, 2020 3:25 PM in response to J Michael

Hi thanks J Michael,


Just to confirm - is the issue only present when using the webcam? Or is it glitchy in general with the 2020 Macbook?


Do you think this is a hardware issue or a software issue which can easily be resolved?


I only have a week left to return the LG 5K and have been on the fence about it the whole time. My plan is to buy a new Macbook at some point in the next year so if it wont be compatible that would suck. Yes it's the best screen I've tried (and i've tried a bunch) but there are uniformity issues with a white screen (un-eveness which others also report) and of course the design is ugly - but the biggest hurdle is that it is very old and very $$$. the current imac screens are wider Gamut and better contrast. But all that being said its the best screen i've found so far..... Ugh.... decisions decisions...


Thanks




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External camera laggy - low frame rate

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