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WiFried: iOS 8 WiFi Issue

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Re: WiFried: iOS 8 WiFi Issue

#61

Post by cobralibre »

I see many comments criticizing Apple's QA and wondering how this defect was not discovered prior to release. The bulk of the comments seem to adopt a tone of disbelief. I find that hard to believe.

It would be illuminating to know more details about how development and testing worked for the Yosemite project. Was this a late change? Were there systematic blind spots in the test environments and test processes that made defects like this difficult to discover internally? Are we even sure that this issue was not identified internally? Etc.

Re: WiFried: iOS 8 WiFi Issue

#62

Post by dennish00a »

I've had WiFi problems for many moons on 10.9: long latencies when pinging the router and complete dropouts for periods of 2-10 seconds every 3 minutes or so. The problem seems only to happen with certain routers. I was hopeful that my problems could be explained by the AirDrop issue (i.e., maybe I was only having problems when in proximity to certain computers using those troublesome routers).

Sadly, I don't even have the awdl0 interface. I tried taking down p2p0 but that didn't help either. Any other ideas?

I am really desperate!!!

Re: WiFried: iOS 8 WiFi Issue

#63

Post by TazeTSchnitzel »

Kudos wrote: post #33
tdicola wrote: post #28

I'm surprised this issue wasn't caught at Apple. You would think they must have a huge network of Macs and iPhones--surely someone should have noticed the poor WiFi performance.

I tested on my 802.11ac network with an iPhone 6 and couldn't replicate using the steps provided. A speed test sustained 193Mb/s. Maybe 802.11ac networks don't have the same problem? I would think Apple are running 802.11ac on campus.

Perhaps 802.11ac, since it uses 5GHz, is less congested and thus has less problems?

Re: WiFried: iOS 8 WiFi Issue

#64

Post by danudey »

JoshTheGeek wrote: post #51
craigching wrote: post #40

Earlier quoted context omitted.

> Switching WiFi networks or even turning WiFi off and back on again will solve the problem for a short period of time. This is exactly the problem I'm having both with my 10.10 MBP and my iPhones/iPads running iOS8. Glad to hear bringing down awdl0 fixes it, I'm going to try it as well, but it seems there's no solution for non-jailbroken iOS devices yet :( Here's the weird thing, my devices (both i and MBP) are fine…

Unrelated: Don't factory reset your router. The software to set it up requires you to downgrade to 10.7 or something. It'd be nice if linksys would update their software, or at least remove the version cap.

I didn't have to use any special software to set up my Linksys E4200, either when it was new or this year.

You can always use the web interface to set it up, it's just 'easier' for non-technical consumers to use the software.

Re: WiFried: iOS 8 WiFi Issue

#65

Post by danudey »

fit2rule wrote: post #14

Bonjour over Wifi is used for more than Airdrop - its also used for virtualized CoreMIDI endpoints, and Audio too .. maybe there's something to be said about paring down the Bonjour refresh interval or something, but then we'd all be complaining about how long it takes to connect our studio gear to the fancy set of iPads whose soul purpose is to rock and roll ..

Bonjour advertisements have an exponential back-off. They'll advertise themselves, then again 1s later, then 3s, then 9s, 27s, etc.

The same is true of bonjour probes; they'll request, then again 1s later, then 3s, then 9s, and so on.

Source: https://developer.apple.com/library/ios/documentation/Cocoa/...

Re: WiFried: iOS 8 WiFi Issue

#66

Post by apenwarr »

Here's my tool for measuring latency glitches in real time on any device with a javascript-capable web browser. Maybe it will help some people narrow down the nature of their wifi slowness problems. In short, if the latency is always high, that's one thing. If it is usually low but then jumps, that's a different thing. http://gfblip.appspot.com/

Re: WiFried: iOS 8 WiFi Issue

#67

Post by fit2rule »

danudey wrote: post #65
fit2rule wrote: post #14

Bonjour over Wifi is used for more than Airdrop - its also used for virtualized CoreMIDI endpoints, and Audio too .. maybe there's something to be said about paring down the Bonjour refresh interval or something, but then we'd all be complaining about how long it takes to connect our studio gear to the fancy set of iPads whose soul purpose is to rock and roll ..

Bonjour advertisements have an exponential back-off. They'll advertise themselves, then again 1s later, then 3s, then 9s, 27s, etc. The same is true of bonjour probes; they'll request, then again 1s later, then 3s, then 9s, and so on. Source: https://developer.apple.com/library/ios/documentation/Cocoa/...

Ah, that explains everything, thanks ..

Re: WiFried: iOS 8 WiFi Issue

#68

Post by edeion »

coldpie wrote: post #45
conradev wrote: post #39

Earlier quoted context omitted.

Sure! It's a combination of static and dynamic analysis. I have a jailbroken phone, which allows me to access any file on the filesystem and decrypt any App Store binaries[1]. The first step is to find in which binaries the functionality lives. I know from searching that AirDrop lives in Sharing.framework[2], which has a supporting daemon, sharingd. Then, I open the binaries in a disassembler like IDA Pro[3] or Hoppe…

Oh crap, I didn't know IDA was free for non-commercial use. I thought it was like Photoshop: prohibitively expensive for most users, so everyone pirates it. I'm going to have to give that a shot.

Maybe you'd like Radare, which is free software. http://www.radare.org/y/

Re: WiFried: iOS 8 WiFi Issue

#69

Post by udalov »

coldpie wrote: post #45
conradev wrote: post #39

Earlier quoted context omitted.

Sure! It's a combination of static and dynamic analysis. I have a jailbroken phone, which allows me to access any file on the filesystem and decrypt any App Store binaries[1]. The first step is to find in which binaries the functionality lives. I know from searching that AirDrop lives in Sharing.framework[2], which has a supporting daemon, sharingd. Then, I open the binaries in a disassembler like IDA Pro[3] or Hoppe…

Oh crap, I didn't know IDA was free for non-commercial use. I thought it was like Photoshop: prohibitively expensive for most users, so everyone pirates it. I'm going to have to give that a shot.

The free version is also Windows-only

Re: WiFried: iOS 8 WiFi Issue

#70

Post by coldpie »

edeion wrote: post #68
coldpie wrote: post #45

Earlier quoted context omitted.

Oh crap, I didn't know IDA was free for non-commercial use. I thought it was like Photoshop: prohibitively expensive for most users, so everyone pirates it. I'm going to have to give that a shot.

Maybe you'd like Radare, which is free software. http://www.radare.org/y/

Thank you for the link.
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