Well we know what happened to Apple when they ousted him as head of Mac and he left.
Apple is aware of battery life problem on 4s and iphone 4
- Thread starter sekelani
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Well we know what happened to Apple when they ousted him as head of Mac and he left.
xrayeyes
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Wasn't Skull commenting on the OP and not that second poster?
You have confused TWO ENTIRELY different posters. The OP states his theory and how he tested it for confirmation. Someone then came alone and said, "OK how do I avoid the bug and then show that the iPhone 4S actually works".
So to help explain what is going on lets start with a level playing field by breaking down only the first post.
Now iOS is a *nix based operating system. Which means it has a video card driver as part of its core components. This driver is in control of a GPU. The key part to this is that the GPU can run code, on its own internally, with NO help or need of the CPUs interaction. That is why they are now called Graphic Processing Units. Since no one has been able to figure out exactly what is going on, this explanation has become the Occam's Razor in a sense. No one could pin down an exact cause because so many apps helped exhibit the bad behavior. That means they must share a common result. The ability to change something that gets stuck and continues to drain the battery.
Now I already stated that I could play games while the phone is at 100% charge and then force the phone to fall below 96% and never be able to recharge 100%. Those games where utilizing the GPU at 100% power. Other have stated they saw this behavior without ever playing a game. The theory he posts explains BOTH conditions flawlessly.
The second poster then asks the obvious question, how do I avoid the GPU at ALL COSTS to see if I can get a battery drain that is better than 1 to 2% per hour. He did it by killing off all code that could possible cause the GPU to keep running code after the fact. His test results show the battery drain is now at 1% per 3 hours. A full 300% increase in battery life. And all he did was AVOID the condition the OP stated was the issue.
As far as I am concerned this looks like the real deal. I have stated MANY times that this was an API issue with a new section of the hardware. It fits and it looks to be reproducible. I figure by next week this result will either be proven beyond a shadow of a doubt or it will lead to the exact root cause. Either way, it was bloody brilliant work.
So to help explain what is going on lets start with a level playing field by breaking down only the first post.
Now iOS is a *nix based operating system. Which means it has a video card driver as part of its core components. This driver is in control of a GPU. The key part to this is that the GPU can run code, on its own internally, with NO help or need of the CPUs interaction. That is why they are now called Graphic Processing Units. Since no one has been able to figure out exactly what is going on, this explanation has become the Occam's Razor in a sense. No one could pin down an exact cause because so many apps helped exhibit the bad behavior. That means they must share a common result. The ability to change something that gets stuck and continues to drain the battery.
Now I already stated that I could play games while the phone is at 100% charge and then force the phone to fall below 96% and never be able to recharge 100%. Those games where utilizing the GPU at 100% power. Other have stated they saw this behavior without ever playing a game. The theory he posts explains BOTH conditions flawlessly.
The second poster then asks the obvious question, how do I avoid the GPU at ALL COSTS to see if I can get a battery drain that is better than 1 to 2% per hour. He did it by killing off all code that could possible cause the GPU to keep running code after the fact. His test results show the battery drain is now at 1% per 3 hours. A full 300% increase in battery life. And all he did was AVOID the condition the OP stated was the issue.
As far as I am concerned this looks like the real deal. I have stated MANY times that this was an API issue with a new section of the hardware. It fits and it looks to be reproducible. I figure by next week this result will either be proven beyond a shadow of a doubt or it will lead to the exact root cause. Either way, it was bloody brilliant work.
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Read the post just above this and follow the link from post #644.
Someone may have figured out why you are seeing a difference.
While you think you may have done the exact same thing both days, odds are you actually did things in different orders. Those differences in which apps you executed and when may leave the GPU running code in background that eats battery life.
I had the same exact thing happen to me last week. One great day of battery life but every other day was so/so.
could this really be the cause ?, are we talking about the 2% per hour drain for the more rapid, getting hot type ?. if ere talking about the rapid hot drain, it does not explain why it happens to some phone and not others running the same apps and settings. if we are talking about the 2% per hour then that's strange as i have done resets with apps shut down etc etc and never really see anything better than 2% per hour
Actually it perfectly explains how two people with the SAME exact app load outs will see different results.
It is the exact sequence of HOW you run the apps that causes the issue. The offending app, which I bet there are 100K plus, only has to be run LAST before you put the phone to sleep.
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You forgot that phone calls and texts are done with applications. IE they both use the GPU to display data to the screen.
I didn't even consider the ipf.net application. Hmmmmm. Will have to dwell on how to reference stuff in the future. Thanks for the heads up on that.
fair point, but how do you explain the in-ability for some people to ever be able to disable the draining effect. my first 4s had rapid drain, i tried everything, closed all apps, soft reset etc etc and it was still draining, evening in flight mode, which i agree would indicate gpu. However nothing i did seemed to stop the draining once it had started
RandyM
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Reading the posts about battery issues with the 4s I was curious to see if my battery ws in the normal range or not. My previous iphone (the 4) required i charge it everyday so I really dont have a frame of refference to go by. Here is a screen shot of my usage data. Im not sure if thats all I would need to upload for someone to tell me or not
If my 4s is to be usable all day I would be laughing.
I can hardly have my phone alive for 8-9 hours with moderate to light usage.
Grrrrrrr ...
That's great stats.
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