justin
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| [iPhone] auto-brightness 3g vs 2g / frame rate 2g vs 3g
I've found out that the iphone 3g auto-brightness sensor is just above the earpiece gap.
Looking at the 2g iphone, I do the following.
a) set the brightness to minimum and auto
b) turn the phone off
c) cover the top part of the iphone and turn it on (mimic pitch black room)
d) slide to unlock it
e) the brightness dims further, toggling the "auto" button shows the change
Looking at the 3g iphone, I do the same thing and I reach step (d) the screen gets slightly BRIGHTER (this is wrong). Toggling the auto button shows the change.
Switching this experiment: turn brightness slider to 100%, the 2g iphone gets much MUCH dimmer after you unlock it in the "dark room" simulation (this is correct). The 3g iphone brightness changes only very slightly down. (this is wrong)
Is this what your 3g iphone does?
The other difference (and this is pervasive):
the iphone 2g launcher page scrolls from left to right extremely smoothly. The "frames per second" must be at least 30, possibly more. By being careful and gentle with your finger, you can get very slow beautiful motion from page 1 to 2 and back again. The phone is always responsive.
the 3g iphone launcher page does not scroll smoothly, its frame rate appears to be 15fps or less, it isn't consistent either, sometimes it jerks and jumps. It is very difficult to use your finger to "prod it" with small momentum. The same problem occurs in many animation transitions and in vertical scrolling as well. And of course often "contacts" hangs when first selected (leaving you hopeless trying to scroll it), or pressing a button doesn't do anything for a while.
If this was a PC I'd assume something nasty was "running in the background" stealing cycles / interrupts or whatever, and I'd go looking for it to kill it. |
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Mchart
Super Joe
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Gurnee, IL
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| I don't have the issues with the launcher/app selection main page. I do definatly have issues with auto-brightness. It just doesn't seem like it's programmed right. (IE - It doesn't get more dim when it's dark out, or get more bright when it's bright out. It seems to randomly decide based on usage almost.)
The contact hang is due to the phone accessing the slow SIM card. This I can understand - But they should make it so the list updates in a dynamic fashion while loading off of the SIM card, instead of halting the entire process waiting for things to update. |
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justin
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1 edit | I don't believe the contact hang are the sim card because my contacts were neither pulled from the card, nor stored on the card. My 2g iphone has no card currently but does not hang when it does, and shows the same contacts when it does not. Putting in a card does not add any new contacts or do anything to that list.
Pulling out the card on the 3g iphone does not improve the hang.
Let me be more specific: pushing 'contacts' shows the list quickly, but scrolling does not work for some length of (annoying) time.
The 2g iphone shows the list slightly less quickly than the 3g iphone but (key point) once it does, the touch screen is active instantly. |
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EveryName
Wake Up
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join:2001-12-05
Montreal
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| reply to justin
I have an iPod Touch, which I just got, and the auto-brightness is ridiculous! I have a BlackBerry, and it works great. There is very dim when it is super dark. A normal setting for normal light. And a super bright mode that activates in the sun. It really works well and I rarely have to turn it off.
As for the iPod Touch, I've noticed that in direct sunlight I usually can't see the screen at all (brightness on 50% and auto-brightness activated). Sometimes it will turn the screen DOWN when it is quite bright. It is usually brighter when I turn the auto brightness off. I just turned it off permanently, because its a useless feature, and was really overlooked. If its really sunny I can just turn it up manually. |
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justin
Australian
join:1999-05-28
Brooklyn, NY | Maybe my 2g iphone was by some amazing chance assembled correctly and most others both 2g, touch and 3g are not.
But it works really well on the 2g.
So very frustrating to see things slide backward so much. |
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Polarbreeze
@tel-ott.com | reply to justin
The auto-brightness on my 3G is broken too. It looks like there's a basic design flaw in the thing. Hopefully it's a software fix and hopefully it's coming soon. |
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djrobx
join:2000-05-31
Valencia, CA | reply to justin
I don't notice problems with the springboard page flipping. But the auto-brightness is definitely broken on the 3G.
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Turbocpe
Premium
join:2001-12-22
IA
1 edit | reply to justin
I don't mean to hijack this thread, but on my 2G iPhone, I followed your steps above. Mine does not adjust correctly?
If I cover the top part of the phone and turn it on, then uncover it X amount of time later, shouldn't there be a difference? Isn't that part of auto adjusting?
The only difference I can see is when I'm in the brightness control and turn the auto adjust slider from off to on. The brightness does adjust upon turning the auto adjust slider from off to on.
But following your steps above, I get nothing. I'm covering the top part of the phone, and on my 2G phone, if you take a flashlight, you can see the sensors just above the ear piece. |
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justin
Australian
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| Maybe your 2g is broken . But the best part of auto brightness on 2g was having the brightness slider at 75pc which was perfectly usable in daylight and then using it at night or movie theater etc and seeing it crank the screen down really low..
This is the last 1.x firmware though, not 2.x which I have not put on the 2g |
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Turbocpe
Premium
join:2001-12-22
IA
| Your steps above don't really do much for my 2G phone running 2.0.1
But if I take a flashlight near the earpieces, where the sensors are, it takes about 5 seconds before it brightens. However, if I remove the flashlight source, it never auto dims. In fact, if I cover the top section of it, it still doesn't auto dim. I've kept the screen active for over 1 minute nonstop and it doesn't dim.
If I turn it off and back on, then the screen is back to normal dim.
May be due to the 2.0.1. But it doesn't appear to work as expected.
Again, I don't mean to hijack. I think I gather that something isn't right. |
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jdong
Eat A Beaver, Save A Tree.
Premium
join:2002-07-09
Rochester, MI
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| reply to justin
I noticed this same regression upgrading my iPod Touch from 1.x to 2.x firmware; I strongly believe this is a problem introduced by the 2.x firmware upgrade. Same with the "framerate"... UI lag on the 2.x firmware is a lot worse than 1.1.x, and I really hope 2.1 will fix that for me.
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