Apple Begins Seeding of iOS 5.1 Beta, Xcode 4.3 to Developers

[PeteLP]

MY main point is that the video driver bug referenced in this quote ... sounds like a very strong candidate for many of the battery problems

A video driver bug would affect all phones. There are tons of units out there that have normal battery life.

Absolutely wrong.
... bugs in ANY one piece of software can exist such that they appear to any conceivable percentage of users. ... (my list of examples)

To say I'm "absolutely wrong" when pointing out it doesn't really make sense in the context of stand-by time is quite a bold statement to make, especially then backing it up with credentials and just plain forgetting the meat of the issue.

Firstly: I apologize for coming off as a bully.

Secondly: I don't see where your initial statement (the statement I responded to) had anything to do with "pointing out it doesn't really make sense in the context of stand-by time".

Your first argument was a simple statement of fact that the bug could not be video drivers because of the fact that many phones did not have the problem. I do maintain that such a statement is wrong, based on the many examples I gave. IMO the only thing absolute here is that we can't simply rule out the video driver bug by such an argument.

It's certainly true that we can't know for sure that this IS a bug or THE BUG, given the available info. We CAN know that it's a strong candidate, which I continue to believe despite your new arguments.

Now let's talk about those new arguments:

As also a trained software developer, I can tell you you're forgetting one big piece of information we have : Stand-by time. Ie, we're all basically running the same code as far as video drivers go : the lock screen (with the screen turned off mostly I'd bet).

Apps by that point are suspended or doing their background tasks only (since we're talking overnight here, not just locked for a few minutes in which the foreground app remains in the foreground), which does not include using the frame buffer or graphical rendering :

To paraphrase your argument: Users observe major differences in battery drain during standby time (agreed). Apps typically do not call video drivers during standby time (also agreed). Therefore a video driver bug can not be the bug that explains those differences in battery drain (disagree)

Having read the link someone posted above, sourcing that video driver bug, (before ever entering this conversation) I learned the following:

Skorp10 used apple tools to look at energy consumption graphs taken over time and found that "in sleep state - when nothing should use the GPU, there is [heavy] recorded video card activity". His theory is that certain app API calls made to the driver BEFORE SLEEP STATE trigger a video driver bug which causes driver activity (and battery drain) to continue THROUGHOUT sleep state, (and that iPhones not using such apps or API calls, eg, would NOT experience such battery drain). Note that THIS WAS THE MAIN POINT OF THE BUG REPORT. He backs this with a good deal of evidence and experimentation, and the theory is supported by follow up tests of others who replied to that thread.

Pete

 

[Painkiller]

Battery Life currently is:

Usage: 2 Hours, 23 Minutes.
Standby: 22 Hours, 12 Minutes.

65% still left. I say my battery got improved.

How was your battery life before the update? Did you had this phantom usage too?

 

[throys]

Battery definitely been improved or I would say fixed in my case.
My friend who has a t-mobile uk has issues with his iphone 4s and has change 3 times and was contacted by a apple engineer who helped him fixed it by giving him so codes to enter and re-enter and after 24 hours they found the error where its fixed temporarily and the engineer said that there was a fixed coming soon with a new update. Not sure if this was the update he was talking about 5.1.

so far today with from taking the phone off charger at 7am with fulL usage including 40 mins of street fighter AND ICLOUD synching with full location services turned on I have

USAGE 3 HOURS, 16 MINS
12 HOURS, 5 MINS STANDBY
AND WITH 53% BATTERY REMAINING.

 

[Painkiller]

USAGE 3 HOURS, 16 MINS
12 HOURS, 5 MINS STANDBY
AND WITH 53% BATTERY REMAINING.

So you would hardly reach the 1day in the standby field?

I have like 6:42 hours usage and 12 hours standby with 56% of left battery. Just played for 15 minutes on two cores (infinity blade) and checked mails and websites. No calls today.... So i am not sure if the phone could last longer and if the update will really fix this phantom usage....

 

[throys]

So you would hardly reach the 1day in the standby field?

I have like 6:42 hours usage and 12 hours standby with 56% of left battery. Just played for 15 minutes on two cores (infinity blade) and checked mails and websites. No calls today.... So i am not sure if the phone could last longer and if the update will really fix this phantom usage....

I never expect miracles with smartphones and using anddroid briefly and numerous friends with android devices most have to turn thier data off for thier phones to last 12 hours of usage.
With the iphone 4 with moderate usage I could go a day n half sometimes so hopefully the next beta it will improve a bit more, but for now I'm more than happy

 

[ntrigue]

Battery Life currently is:

Usage: 2 Hours, 23 Minutes.
Standby: 22 Hours, 12 Minutes.

65% still left. I say my battery got improved.

What are you guys running as far as features? Mine died in six hours.

 

[throys]

What are you guys running as far as features? Mine died in six hours.

I have around 74 apps installed including games, etc.
Icloud mail fetch feature on
Around 45 mins of calls
around 34 imessage send in 24 hours
pulse news check frequently once an hour
couple youtube vids
45 mins of street fighter games
and safari use

today battery died from a whole day of charge

 

[lam93]

phone got to 20 percent then restarted. Never happened to me before 5.1 so ill assume it was the update.

 

[lam93]

any news on the final version?

 

[milo]

It's still probably a few weeks away.

 

[tarasis]

phone got to 20 percent then restarted. Never happened to me before 5.1 so ill assume it was the update.

I've had 2 odd restarts on 5.1, one this morning just after I disconnected it from the charger and the previous one about 5 - 10 minutes after taking it off charge and had opened the AppStore app.

 

[ucantgetridofme]

y