Apple Catalina Appears to Introduce Massive Jitter - SOLVED!
aaron at digitalcrossroad.org
aaron at digitalcrossroad.org
Fri Oct 30 20:57:13 UTC 2020
Hi Mark,
I'm running a MacBook Pro (Retina, 15-inch, Mid 2015) with Mojave 10.14.6 (latest).
I've always had location services off (including all system services within).
I haven't seen any jitter issues on my end.
Along with, no matter if I have bluetooth turned on with my wireless mouse and keyboard connected or not, I see no consistent change in jitter.
Even further, enabling location services (including all system services within) and bluetooth enabled, I'm not seeing any change in jitter.
I know you said earlier this issue seems to have started somewhere _around_ Mojave so just my two cents.
-Aaron
Oct 30, 2020, 12:08 by mark.tinka at seacom.com:
> Hi all.
>
> So I may have fixed this for my end, and hopefully others may be able to use the same fix.
>
> After a tip from Karl Auerbach and this link:
>
> > https://developer.apple.com/forums/thread/97805
>
> ... I was able to fix the problem by disabling Bluetooth.
>
> However, disabling Bluetooth was not enough. I also had to disable all Location Services.
>
> After that, I re-enabled Location Services and only allowed for two features:
>
> - NetSpot
> - Find My Mac
>
> With just those two location services, as well as Bluetooth disabled, I have no more high jitter.
>
> App performance like Zoom and Youtube uploads are now crisp, with 0.0% packet loss.
>
> So looks like that Bluetooth is a huge problem. Confirmed by opening the "Console" app, and adding "scan" in the filter bar, top right.
>
> A peak latency of 13.5ms after 300 packets:
>
> Marks-MacBook-Pro.local(172.16.0.239) 2020-10-30T21:06:05+0200
> Keys: Help Display mode Restart statistics Order of fields quit
> Packets Pings
> Host Loss% Snt Last Avg Best Wrst StDev
> 1.172.16.0.254 0.0% 300 3.1 4.8 2.2 13.5 1.9
>
> Mark.
>
>
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