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 Google Nexus 4 - V5, >150 proud owners

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Harddisk
post Jan 28 2013, 11:43 AM

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OMG, the lag... when the phone is in heat, like a b****. doh.gif
Harddisk
post Jan 28 2013, 01:06 PM

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QUOTE(billy_overheat @ Jan 28 2013, 11:52 AM)
how hot is it? @@
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Don't have laser thermometer to measure that.

QUOTE(herojack41 @ Jan 28 2013, 11:53 AM)
blink.gif snapdragon lag when it heat up?  hmm.gif or maybe you running too much thing at the same time??

well.....while i gaming....my tegra 3 seems ok although the phone is very hot
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This is not Tegra 3 la. Since when does "running too much thing" in Android makes the phone heats up? laugh.gif

QUOTE(Kazz123 @ Jan 28 2013, 12:16 PM)
Was using one power guard, and got a over heat warning, I think temperature is over 40 degree. But the phone didn't lag~~~ I Dun think the lag is from the heat bro~~ 2cents
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Bro, you didn't do enough research. It has been proven by Anandtech that Nexus 4 will "slow down" the processor if the phone is overheating (reason unknown). Hence the lower benchmark scores compared to it's counterpart phones with same spec (LG Optimus G, HTC Droid DNA, etc)

So yes, the lag was indeed caused by the heat. sweat.gif
Harddisk
post Jan 28 2013, 01:19 PM

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QUOTE(benny888 @ Jan 28 2013, 01:09 PM)
3 of my friend using iPhone don't even use or know iTunes!!
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OT: How did they even initialise the phone for the first time? IIRC, you need iTunes to activate the phone for the 1st time before using it, right?
Harddisk
post Jan 28 2013, 01:23 PM

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QUOTE(Kazz123 @ Jan 28 2013, 01:13 PM)
Ooooo.... Didn't read anandtech review~~ so far so good for my phone.. Anyway~~ what apps are u running? The only lag I experience is during apps installation... But that only lasted a sec or two...
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Just normal web surfing using 3G connection after I took a PhotoSphere. Earlier I was having problem with the connection. Showing H but no connection (probably fall into Maxis' network), so I did some stuff like set to Airplane ON/OFF to try to reinitialise the connection, but failed. By doing all these stuff, phone starts to warm up.

So finally I force a reboot and I get back my connection. By that time, phone was quite warm already. So I just go with my usual stuff, G+, FB. Eventually it falls into hotter than "warm" category. That's where the keyboard went lagging on me.

Most of the time when the CPU down clock, the most obvious lag would be the keyboard.
Harddisk
post Jan 28 2013, 01:44 PM

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QUOTE(herojack41 @ Jan 28 2013, 01:39 PM)
i know......but isnt this snapdragon suppose to be > tegra 3?  hmm.gif
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I don't get such lag on my GNex if the device heats up, but that doesn't mean TI OMAP is better than the Snapdragon in Nexus 4.

I didn't get the right term earlier, so I quote:
QUOTE(cowithgun @ Jan 28 2013, 01:30 PM)
Nexus 4 has a thermal throttle set to rather low at just 60 Celsius. So the CPU slow down to prevent overheat. However this is to low. It should be fine even at 75. I suspect that is what other phones are using. Silk check when I am free.
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This is the main reason why the lag appears, because of the sudden lacked of CPU resource for the apps to run.

QUOTE(Kazz123 @ Jan 28 2013, 01:43 PM)
Not sure what's happening there. But I do know that, whenever I lost connection (data, network), it will automatically warms up.. Working in a plant with a lot of EM interference, sometimes really warms up the pocket. Have to off all data.

Conclusion, I think the warmth is from your network connection. But getting laggy after that, I am clueless. Sifus sifus here have any idea why?
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The heat generated from the lacked of signal was a collateral damage. It's accounted into the thermal detector used by the CPU as well. And I believe they are in the same area. So if 3G chip heats up, the CPU follows. It's SoC right? Meaning both CPU and 3G controller supposed to be on the same chip.

So there you go. laugh.gif

This post has been edited by Harddisk: Jan 28 2013, 01:47 PM
Harddisk
post Jan 28 2013, 02:26 PM

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QUOTE(Kazz123 @ Jan 28 2013, 01:53 PM)
So the conclusion is, try to have good connection every time to avoid device heating up. Or put it on a cold place, ie in front of aircond to cold it down.

Then I have another question, this constant heating and cooling, dies it affect the glass back? Am really concern with it cracking~~ huhuhu..
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Couldn't care less. If it will crack, it will crack.

The only way to avoid heating up the device is to not using it, which defeats the purpose of me buying it. sweat.gif

So I'll use it, let it heats up, if the rear glass wanna crack, there's nothing I can do about it. The only thing is, if I could only safely lift the thermal throttle thing without risking the CPU burned. hmm.gif

Anyway, having rear glass does help to dissipate the heat faster.
Harddisk
post Jan 28 2013, 03:49 PM

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QUOTE(benny888 @ Jan 28 2013, 03:07 PM)
So far I know of only one case back glass cracked supposedly due to temperature change - affected was an editor from Droidlfe. Since he was from Droidlife this issue was spread all over the web. We do not really know the exact circumstances except he claim the " back getting warm from the heat of his hand. Then when he gently placed the phone on his room temperature countertop (I’m assuming the room temperature was quite low), the glass could not bear the sudden drop in temperature, resulting in the rather enormous crack ".
This was reported in late Nov
Have not read/heard of any new such cases since than
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He also claimed that similar thing happened to LG Optimus G which he was having it at that moment, together with photo shots of both phones with cracked rear glass.
Harddisk
post Jan 28 2013, 08:28 PM

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QUOTE(cowithgun @ Jan 28 2013, 04:02 PM)
Did some checking on the thermal throttling issues. Apparently, Optimus G really has a much higher Thermal Throttle at 93C!

https://github.com/jonasl/LGE970_ICS_kernel...e/j1/board-j1.c (line 1985-1999)

CODE

static struct msm_thermal_data msm_thermal_pdata = {
.sensor_id = 7,
.poll_ms = 1000,
#ifdef CONFIG_MACH_LGE //sync with thermald-8064.conf's temperature. actually 60'C is too low to degrate CPU freqency to 918MHz
.limit_temp = 93, //later carefully tune it
#else
.limit_temp = 60,
#endif
.temp_hysteresis = 10,
.limit_freq = 918000,
};


By comparison, the default thermal throttle for Nexus 4 is way low at 60C. If you believe your Nexus 4 always slow down due to thermal throttle, you should change the ".limit_temp = 60" to say 75C. I think it is still perfectly safe at 75C.
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Gotta compile the kernel yourself in order to make this work?
Harddisk
post Jan 29 2013, 12:09 PM

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Finally, found a faster line, but this is not a place I'd hangout at just for the sake of the faster connection
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Harddisk
post Jan 29 2013, 02:38 PM

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http://www.rearthusa.com/google-nexus-4-hybrid-fusion-case
Harddisk
post Feb 5 2013, 10:56 AM

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Both photo taken 1 after another with the same WB setting (not auto). Camera really sucks. doh.gif
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Harddisk
post Feb 5 2013, 11:37 PM

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Any method to calibrate the gyro? Now I take PhotoSphere, the sensor sengek. Very difficult to take decent PhotoSphere now.

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