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Did iOS 9 set millions of iPhone clocks to the wrong time?

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Re: Did iOS 9 set millions of iPhone clocks to the wrong time?

#11

Post by jameswilsterman »

PhantomGremlin wrote: post #10

I monitor ntp activity from the computers and iPhones on my home network, so I have a good understanding of how Apple does this, at least on OS X and iOS 8.4, at least when WiFi is available. It's simple ntp. The computers ask DNS for time.apple.com, while the iOS devices ask for a similar domain, time-ios.apple.com. From that point both types of devices make ntp requests. What I do on my firewall is redirect those r…

For me the problem seems to affect both WiFi and LTE (on Verizon).

What's crazy is that my clock seems to be getting worse. It's gone from 5s off to now ~20s off since I've upgraded.

Re: Did iOS 9 set millions of iPhone clocks to the wrong time?

#12

Post by AlphaSite »

jameswilsterman wrote: post #11
PhantomGremlin wrote: post #10

I monitor ntp activity from the computers and iPhones on my home network, so I have a good understanding of how Apple does this, at least on OS X and iOS 8.4, at least when WiFi is available. It's simple ntp. The computers ask DNS for time.apple.com, while the iOS devices ask for a similar domain, time-ios.apple.com. From that point both types of devices make ntp requests. What I do on my firewall is redirect those r…

For me the problem seems to affect both WiFi and LTE (on Verizon). What's crazy is that my clock seems to be getting worse. It's gone from 5s off to now ~20s off since I've upgraded.

It's gotten to a minute and 2 s now.

Re: Did iOS 9 set millions of iPhone clocks to the wrong time?

#13

Post by toufka »

PhantomGremlin wrote: post #10

I monitor ntp activity from the computers and iPhones on my home network, so I have a good understanding of how Apple does this, at least on OS X and iOS 8.4, at least when WiFi is available. It's simple ntp. The computers ask DNS for time.apple.com, while the iOS devices ask for a similar domain, time-ios.apple.com. From that point both types of devices make ntp requests. What I do on my firewall is redirect those r…

It affects (non-cellular) iPads with iOS9 as well, so likely not a carrier-related issue. So it's not issue #3. And like you say, a lot more than iOS9 would be out of sync if it was #2. So we're going to have to go with #1 - Apple broke something in ntp.

Re: Did iOS 9 set millions of iPhone clocks to the wrong time?

#15

Post by waz0wski »

toufka wrote: post #13
PhantomGremlin wrote: post #10

I monitor ntp activity from the computers and iPhones on my home network, so I have a good understanding of how Apple does this, at least on OS X and iOS 8.4, at least when WiFi is available. It's simple ntp. The computers ask DNS for time.apple.com, while the iOS devices ask for a similar domain, time-ios.apple.com. From that point both types of devices make ntp requests. What I do on my firewall is redirect those r…

It affects (non-cellular) iPads with iOS9 as well, so likely not a carrier-related issue. So it's not issue #3. And like you say, a lot more than iOS9 would be out of sync if it was #2. So we're going to have to go with #1 - Apple broke something in ntp.

wonder if it's due to something that's changed as part of the battery life improvements, from process scheduling to clockspeed changes
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