Develop Bugs

[Q] Proximity sensor calibration

I am having an issue with my proximity sensor and believe it may be some sort of calibration issue. It works (ie when I am in calls, if I cover it with my finger, it shuts off the screen) but the sensitivity has become very poor. I've had the phone since the day it was released and the proximity sensor had no trouble reflecting off my head and keeping the screen off during calls. Over the last few months I've noticed I started hitting buttons with my ear during calls because the screen is not shutting down. It seems like the sensitivity has decreased by some fixed amount in the last few months. It is very annoying because I keep accidentally hanging up on people or hitting the hold call button while I am talking.
The only two things I thought it could be would be either the sensor needs to be calibrated or possibly the sensor is going bad. I'm running the cyanogen 7 nightlies but have also tried reverting to some of the more stable RCs and still had the issue. I will try going back to a t-mobile rom tonight to see if that helps.
Has anyone else experienced this? Or does anyone know how to re-calibrate the sensor?

z test from market calibrates (im pretty sure)

smokeuout said:
z test from market calibrates (im pretty sure)
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Click to collapse
I gave it a shot, but I didn't see anything for calibrating the proxy sensor in that app.
I did however do a test using the camera on my transformer and compared the intensity of the proxy sensor LED to that on other phones. It appears as if mine is very dim and barely blinks. I think the infrared LED is burning out or the circuit that supplies it is not putting out the correct power.
Has anyone ever tried replacing a bad proxy LED before?

try sucking over the surface with a vaccum...i know it sounds crazy but its fixed alot of proxy sensors

smokeuout said:
try sucking over the surface with a vaccum...i know it sounds crazy but its fixed alot of proxy sensors
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That, or use one of those compressed-air cans for cleaning stuff and blow it into the speaker hole towards the proximity sensor (to the left of the speaker hole.) The proximity sensor seems very sensitive to dust particles.

You haven't installed or changed screen protectors recently, by any chance? Those have been known to mess up the sensor. Also, make sure the protector or glass is nice and clean in the area of the sensor.

Thanks for all the great advice! I'm going to give the vacuum and air can a shot.
Oh and to answer redpoint, I haven't installed any screen protectors on this phone ever, but thanks for the advice.

My GF's Vision behaves the same...
Still looking for a calibration tool, i found only one, but that don't work.
Also tried to "clean" the sensor
I think we have to return it to htc...

Same problem with my DZ since I put Virtuous G Lite on it. Did you guys find a solution for your proximity sensor ?
Cleaning or software ?

cri-cri16 said:
Same problem with my DZ since I put Virtuous G Lite on it. Did you guys find a solution for your proximity sensor ?
Cleaning or software ?
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I am having the same problem. I keep hitting the hold button. Any fixes?

Smart Stay Error

Just this evening I noticed when I put my phone under a lamp with a bulb, the phone thinks the lamp is my face and doesn't turn off the screen. Are you guys experiencing the same thing?
Sent from my GT-N7100 using Tapatalk 2

prinzhernan said:
Just this evening I noticed when I put my phone under a lamp with a bulb, the phone thinks the lamp is my face and doesn't turn off the screen. Are you guys experiencing the same thing?
Sent from my GT-N7100 using Tapatalk 2
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Click to collapse
I experienced the same thing though it happened randomly. I tried to put my friends sgn2 side by side with mine and his phone doesnt have this problem.
Is this hardware problem? How to fix it?

MimpiGadget said:
I experienced the same thing though it happened randomly. I tried to put my friends sgn2 side by side with mine and his phone doesnt have this problem.
Is this hardware problem? How to fix it?
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Click to collapse
I don't know. Seems to happen on my note 2 randomly.

Today it happened to me in dim litted situation. So it seems not limited only on bright situation.

Yes, I had this problem some days back! Damn, I was going to wipe my device for this, then thought about un'smart' stay and just rebooted the device, got fixed!
Btw- The smart alert feature is also not responding for me sometimes! When I pick the device up from the table beside my bed it vibrates sometimes, but most times it don't. Don't know what's going on!
Sent from my GT-N7100

These smart features use the front camera as the sensor to determine the condition. Should there be any defect on the hardware, itu must be the front camera. But I find my front camera to work well on taking photos. So I wonder what caused this? software? I don't think so since I was using the same version firmware with my friend and only mine got that problem.
I have no idea what is the cause of the problem.
If anyone had these problem, please describe it here so we can get an idea what might caused these.

The software does what it can. It confuses our eyes with other things. it has happened to me. I think it's more meant for you to look at your phone and not turn off rather than being able to 100% distinguish your face in all situations and know to turn off the screen. Most of the time it works though. I'm happy! But usually to not waste battery I turn off the screen when I put it down.

[Q] Proximity Sensor dead. Suggestions to simulate its working?

Alright. My proximity sensor has been dead for a while now. (And yes, it indeed is dead. I've used Proximity Sensor Recallibrator and different apps for testing it.)
It's not a very big issue to use the phone without a working Proximity Sensor. But it gets annoying while attending calls. With a functional sensor, the phone locks itself when you place the phone next to your ear. However, as expected mine doesn't. I've made it a habit to manually lock the screen by pressing the power button before making a call or after receiving a call. However, there are times when I forget in the rush and it leads to very annoying things, the notification drawer slides down and apparently 'my ear' presses and activates wifi, bluetooth and almost everything on the power widget in the notification drawer.
Its really annoying.
I know there's no real way of actually simulating a proximity sensor. So I just need suggestions from you guys as to how to tackle this problem. Any suggestions with creative ideas or workarounds would be welcome.

When i had an htc hd2 i had the same proble and i was using one out of two apps the problem is i can't fully remember the names, one was ditching the proximity sensor and using the light sensor for proximity and the other one was suposed to make the proximity sensor much snappier using partial info from light sensor. Search the play store for "proximity".
P.S. did you dismantle the phone to see if you have dust behind the speaker gril? I had the same problem with my handset , i could have swore that my sensor was dead but after i cleaned it it worked. Hoped i helped
Sent from my Desire HD using xda app-developers app

bondocel said:
When i had an htc hd2 i had the same proble and i was using one out of two apps the problem is i can't fully remember the names, one was ditching the proximity sensor and using the light sensor for proximity and the other one was suposed to make the proximity sensor much snappier using partial info from light sensor. Search the play store for "proximity".
P.S. did you dismantle the phone to see if you have dust behind the speaker gril? I had the same problem with my handset , i could have swore that my sensor was dead but after i cleaned it it worked. Hoped i helped
Sent from my Desire HD using xda app-developers app
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Light sensor data for proximity checks. Its an innovative idea... although wouldn't that make my phone lock itself when the lights are turned off?
Also, the dust thing might be a problem, I'll give it a try to see if it helps. Thanks.

if4ct0r said:
Light sensor data for proximity checks. Its an innovative idea... although wouldn't that make my phone lock itself when the lights are turned off?
Also, the dust thing might be a problem, I'll give it a try to see if it helps. Thanks.
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1 No that app activates only in call, it bypasses the the sensor data from proximity to light while in call then reverts back after call ends the only downside is that it is not as snappy but it is better than nothing
2 Dismantle your back casing and you will find the motherload of dust in speaker grill, if you didn't check that out first then i'm 99% sure this is your problem: filth in speaker grill and on proxy and light sensors you will find a carpet of dust
Caution!!!!
-watch a dismantling video before you start
-if you want to use compressed air to clean the speaker funnel don't exceed 2 bar max and blow at a distance of 15-25 cm not closer
For further support i will help you over forum but check google or xda for a tutorial

bondocel said:
1 No that app activates only in call, it bypasses the the sensor data from proximity to light while in call then reverts back after call ends the only downside is that it is not as snappy but it is better than nothing
2 Dismantle your back casing and you will find the motherload of dust in speaker grill, if you didn't check that out first then i'm 99% sure this is your problem: filth in speaker grill and on proxy and light sensors you will find a carpet of dust
Caution!!!!
-watch a dismantling video before you start
-if you want to use compressed air to clean the speaker funnel don't exceed 2 bar max and blow at a distance of 15-25 cm not closer
For further support i will help you over forum but check google or xda for a tutorial
Click to expand...
Click to collapse
Can you recall the name of the apps? A bit more help than "proximity" would do.. there are a ton load of crappy apps out there with proximity in their names
And thanks for the suggestion I was indeed watching a dismantling video just now.

https://play.google.com/store/apps/details?id=TomReay.proxSensor&feature=search_result
This was the app i initialy used but back then it was't only for htc hero it was only fot htc
But i can't seem to find the second one it was something like :
https://play.google.com/store/apps/details?id=com.hardrock.smartscreenoff&feature=search_result
But i am not 100 % sure this is it
Any progres on dismanteling? i do the cleaning about once in 2 months and it works perfect

bondocel said:
https://play.google.com/store/apps/details?id=TomReay.proxSensor&feature=search_result
This was the app i initialy used but back then it was't only for htc hero it was only fot htc
But i can't seem to find the second one it was something like :
https://play.google.com/store/apps/details?id=com.hardrock.smartscreenoff&feature=search_result
But i am not 100 % sure this is it
Any progres on dismanteling? i do the cleaning about once in 2 months and it works perfect
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Click to collapse
These were the apps that I found. The first one does not work. (I tried it out of desperation even though it stated it was only for HTC Hero ). I read the description of the second one you mentioned and it does not state any such feature about using the light sensor. The closest thing that app would do is to turn the screen off by shaking.
Anyway, you've given me the idea about using the light sensor data only when there is a phone call to lock the screen. I'll try to use Tasker to see if I can make a setting for that scenario. Otherwise I'll just go ahead and make the app.
As for the dismantling, I've seen the video and to get to the grill all I have to do is to remove the gps cover, remove the agency sticker, unscrew 5 screws of the main body cover and remove the cover... right? But unfortunately I don't have the screwdrivers right now, I'll get them first tomorrow and then definitely clean the grill.

if4ct0r said:
These were the apps that I found. The first one does not work. (I tried it out of desperation even though it stated it was only for HTC Hero ). I read the description of the second one you mentioned and it does not state any such feature about using the light sensor. The closest thing that app would do is to turn the screen off by shaking.
Anyway, you've given me the idea about using the light sensor data only when there is a phone call to lock the screen. I'll try to use Tasker to see if I can make a setting for that scenario. Otherwise I'll just go ahead and make the app.
As for the dismantling, I've seen the video and to get to the grill all I have to do is to remove the gps cover, remove the agency sticker, unscrew 5 screws of the main body cover and remove the cover... right? But unfortunately I don't have the screwdrivers right now, I'll get them first tomorrow and then definitely clean the grill.
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Click to collapse
If you have the phone for a long time and you never cleaned it , that might be your problem.
Btw didn't you notice that the phone would turn off harder and sometimes sporadickly while in call before it stoped working?

bondocel said:
If you have the phone for a long time and you never cleaned it , that might be your problem.
Btw didn't you notice that the phone would turn off harder and sometimes sporadickly while in call before it stoped working?
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Click to collapse
Actually.. I don't recall when it actually stopped working. So no, I have no recollection of such happenings. But I do believe you that it might be a possible cause because of the way I handle the phone, dust is a very real possibility.

Ok my friend i will stay tuned on the topic. i will go to bed now but i will be here tomorow to help and assist with whatever i can.
Good luck m8!

Tell me if you mannaged to fix anything.

First of all try to clean the sensor

I've got a simple one... Call a friend and place your hand over the sensor. If the screens turns off its working lol

Knock On Not working properly

Hi, everyone. So I have an LG G4 for more than a year now and I am very pleased with its performance. I did have an issue with sometimes the audio is stuck after a call but I think it more has to do with bad reception as I noticed so its rare this days. However, lately something happened with the knock on feature which I cannot figure out at all. Sometimes it just doesn't work. I tap and nothing happens. The power on button is working perfectly but the knock on is unresponsive. I fiddled with the proximity sensor but it's not it. Sometimes it just stops working for 5-6 times and then it works and the again it doesn't. There is no pattern. When it's powering on the feature works with no hiccups but after that it's like the cpu forgets to monitor the process. I don't know. I have tried calibration and it works with no problem for a few minutes and then it goes back again to this stutter. Does anyone have any ideas about this? I am thinking factory reset but the hassle would be pointless if the problem persists and I am in no mood to install all those apps I have from the beginning for no reason. Any hep will be really appreciated. Thanks in advance.

I am experiencing the same issue but mine Knock on is a bit delaying.. for an example, I double tap on the screen and it gives response in 3-4 mins or not... I am suspecting from screen protector which has been mounted for almost a year, it could be corrupted(scratch) Give a try on removing the screen protector(if you have any)

It's a hardware problem. Many threads online about it
Sent from my LG-H811 using Tapatalk

Nailen said:
Hi, everyone. So I have an LG G4 for more than a year now and I am very pleased with its performance. I did have an issue with sometimes the audio is stuck after a call but I think it more has to do with bad reception as I noticed so its rare this days. However, lately something happened with the knock on feature which I cannot figure out at all. Sometimes it just doesn't work. I tap and nothing happens. The power on button is working perfectly but the knock on is unresponsive. I fiddled with the proximity sensor but it's not it. Sometimes it just stops working for 5-6 times and then it works and the again it doesn't. There is no pattern. When it's powering on the feature works with no hiccups but after that it's like the cpu forgets to monitor the process. I don't know. I have tried calibration and it works with no problem for a few minutes and then it goes back again to this stutter. Does anyone have any ideas about this? I am thinking factory reset but the hassle would be pointless if the problem persists and I am in no mood to install all those apps I have from the beginning for no reason. Any hep will be really appreciated. Thanks in advance.
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Click to collapse
Is your case or temp glass protect over prox sensor. That can affect it bad. Also scratches on glass over prox sensor. If not. Then more than likely hardware related.

No the screen protector does not cover the prox sensor. It's cut out as it should be. I am starting to think it's a hardware problem. The thing is why now?!

Nailen said:
No the screen protector does not cover the prox sensor. It's cut out as it should be. I am starting to think it's a hardware problem. The thing is why now?!
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They are mostly sensors just like on a car. Sometimes it's just there time. Electrical components fail all the time. Are u rooted. Modified anything recently?

TheMadScientist420 said:
They are mostly sensors just like on a car. Sometimes it's just there time. Electrical components fail all the time. Are u rooted. Modified anything recently?
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Click to collapse
No. I haven't touched it at all yet. I am pretty satisfied with the performance so I left it alone. The only thing worth mentioning is that I overheated taking a lot of pictures during an event. Maybe this did a number on it!

I have been discussing the issue with a technican today. It is a hardware issue, you cannot fix it. Apparently, the proximity sensor dies after ~2 years - at least somewhat. Why somewhat?
Check this out: You can check the status of your sensor using MINIOS, type *#546368#*815# (n.b. - swap 815 for your model number).
Now click device test - MT - ok - Individual Item - Sensor test - WAIT!
The proximity sensor will run a test and likely come up with a figure between 60~90. The actual value should be 220+.
Meaning: Your phone thinks it´s ~6-9 cm away from your face, that is not enough to trigger knock-on but it´s far enough to be triggered using the backside button.

My knock on doesn't work, but knock off does. Not a major issue, just annoying!

Question about an proximity sensor issue

So i have an H812 model and last year i had the dreaded boot loop issue but got it fixed under warranty and no issue since with that. The issue that is irritating the hell out of me now is that the double tap to turn screen on just stopped working reliably. It barely ever works.
I've tried the sensor calibration from the hidden menu and i have a question about that also. My sensor acts like it calibrates fine but the # next it seems kinda low (# next to proximety cal pass ...). It's around 48. See screenshot for reference taken from xda https://forum.xda-developers.com/attachment.php?attachmentid=3513220&d=1445359160
Has my sensor just crapped out? and if so, is that normal. Any help would be appreciated, i've gotten so addicted to using that feature that people ask me what the hell i'm doing when i try to turn their phones screen on lol.
Edit: No screen protector on btw and the internal board as far as i can see seems fine too. And the double tap to turn screen off works fine.
Thanks

sunster said:
So i have an H812 model and last year i had the dreaded boot loop issue but got it fixed under warranty and no issue since with that. The issue that is irritating the hell out of me now is that the double tap to turn screen on just stopped working reliably. It barely ever works.
I've tried the sensor calibration from the hidden menu and i have a question about that also. My sensor acts like it calibrates fine but the # next it seems kinda low (# next to proximety cal pass ...). It's around 48. See screenshot for reference taken from xda https://forum.xda-developers.com/attachment.php?attachmentid=3513220&d=1445359160
Has my sensor just crapped out? and if so, is that normal. Any help would be appreciated, i've gotten so addicted to using that feature that people ask me what the hell i'm doing when i try to turn their phones screen on lol.
Edit: No screen protector on btw and the internal board as far as i can see seems fine too. And the double tap to turn screen off works fine.
Thanks
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Is the little black rubber plug in the prox sensor. They may have forgot to put it back in. This little black plug is required for proper prox sensor to function properly.

Thnaks for the response but It worked perfectly for quite some time after the board was replaced by the service center so don't think that's it.

I'm guessing you dropped your phone. That's the problem

deltadiesel said:
I'm guessing you dropped your phone. That's the problem
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Sorry man, never got an alert to this but better late than never . Can't recall but i might have. Why would you say that? Is there a possibility something moved or broke or just plain got whacked out of place? Of course the issue is still there. I was thinking about opening it up anyways so i'll take a look. Thanks

sunster said:
Sorry man, never got an alert to this but better late than never . Can't recall but i might have. Why would you say that? Is there a possibility something moved or broke or just plain got whacked out of place? Of course the issue is still there. I was thinking about opening it up anyways so i'll take a look. Thanks
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So i opened it up and checked the rubber piece just to make sure and it's there. Everything else looks ok. I guess the sensor just crapped out and will just continue to live with it.