WDT timeout, unsolvable?

Hi Joris

Got an update already. I've got the same problem here on iOS 5.0 and would like to know the final solution.

Thanks

Frank

Frank@franknoort.nl

I too would like to know what the WDT timeout is in panic.plist as I've all of a sudden been experiencing kernel panics on my iPad 2.

Is it jailboken? The only times I've read about WDT (Watchdog timer) errors is on jailbroken devices.

Nope, that's the odd thing. Never jail broken and never will. Doesn't appeal to me at all.

The WDT monitors apps, and kills them if they don't respond within a preset timeout (all apps are supposed to "check in" with iOS frequently*). If it's a built in app that doesn't respond you will get a kernel panic (sort of like a Windows Blue Screen of Death). As to WHY a built in app isn't responding, it's as much a mystery to me as it is to you. As a start restore the device with iTunes and set up as New. Add only email accounts and test. If it doesn't crash after a while add back other apps. If it crashes as New you've got a hardware problem.

*For all you developers who just cringed, please forgive my gross oversimplification

Thanks, very helpful explanation. I will try restoring from new and see what happens. Odd, though, that this would only happen in the last month after having used the device for nearly a year. Could it really be a hardware issue if the problem only started recently?

Very helpful indeed. I was at the Apple Store yesterday and they stated it was a hardware problem. Want to makse sure with this methors to see if they are right.

Made a fresh start today, installed the basis iOS 5.0.1 with a very few applications. Lets see how long this will last.

Was the restore as new device helpful?

Same on iPhone 5. Since iOS 8.1. "panic.ips" in diagnostics, "WDT timeout". Seems to be a software bug. It seems I meanwhile detected a pattern: From time to time when doing app store updates it happens. A few minutes ago again with the facebook app. Could it be a storage issue (iPhone is pretty full!)?

Is it a hardware bug (new battery, new display, ...) or is it a software bug?

I have currently the following suspects:

- Battery (replacement part from Apple in use)

- Display (replacement part from Apple in use)

- Flash storage (free disk space very low (< 1 GB left))

- iOS

The ResetCounter-Log created after reboot of the iDevice has "bug_type" = 115).

What do you think?

MobileHero wrote:

What do you think?

I think you're far more likely to get answers if you start your own thread. This one was dormant for almost three years before you resurrected it. You have a completely different phone and different version of iOS.

MobileHero,

I have exactly the same symptoms on my iPhone 5, have done for a long time, can't find cause or solution (tried DFU and normal restore, several updates etc). Interestingly enough I had the issue 1st where the phone would freeze for a few mins and then come back as if noting was wrong (I assumed a faulty app running in background) but I just got used to it as it was not often and did not reboot, however these days it either comes back for a split second then reboots or reboots straight away (I think apple may have changed timeout behavior to restart SpringBoard or the OS if there is inactivity where as before it was more tolerant).

Some days it only happens once or twice, other days it happens 10-20 times. Apple Store diagnostics didn't help. Have also replaced screen and battery after the issue and has not changed it at all. It definitely happens more often if I am updating apps, in fact I can be sure that it will happen most of the time when updating apps. Phone is close to full (64GB with 2GB left) and I fear that it is a hardware issue with the flash storage.

Did you open another thread on this?

Thanks!

Hi,

after trying and checking several things for weeks I´m now pretty sure it´s the flash storage. The error will only appear if the remaining storage is shrinking. Not sure at how much GB storage left it started, but with about 2 GB or less remaining the bug shows it´s "bad side": Screen freeze, Reboot, taking a few minutes. I managed to clear some GB - now about 5 GB free space left - and the bug "get´s better": When freezing the screen only turns black and comes back to lock screen a few moments later.

I´m currently focussing on trying to figure out how much GB left is the border line. The bug can be provoked at nearly 100% by simply running app store updates.

For me it seems - again - like a flash storage bug. And because it never has been changed this hardware error has been delivered already by factory. Interesting point in matters of customer rights...

Any news?!?

Hi: I have an iPhone 4s with 7.1.2 for 5 years, and I have never had this problem before. But when I changed the battery, it begun having that error "WDT timeout" panic.ips bug_type

Hi Pelupa. You should take it back to the store that changed the battery.