Database Users

[Q] Proximity sensor funkiness?

This has been happening pre and post Nodo on my focus. If i'm on a phone call for at least a few minutes, then pull the phone away from my head, the phone's display should become active, but it isn't.
Anyone else having this issue or is it time to exchange the phone?

I have the same issue also it seems like I have to press the power button a couple of times to get it back.
Sent from my SGH-i917 using XDA Windows Phone 7 App

I'm also having this issue. Anyone remember if ther were having it pre-Nodo? Just wondering if the update changed something.
Regardless, it's a bit of a PITA.

I experienced this after having to replace a cracked screen. I just recalibrated the proximity sensor with my finger about an inch away and it worked fine.

ArcWhistler said:
I experienced this after having to replace a cracked screen. I just recalibrated the proximity sensor with my finger about an inch away and it worked fine.
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How did you do that?

Yeah, ditto that - how do recalibrate the sensor?

Samsung Diagnostic App.
http://forum.xda-developers.com/showthread.php?t=839154
I was pecking around the screens months ago, and there was one bank of tests (multi-touch, red, green, blue, white, battery, etc, etc) that allowed setting and viewing the proximity sensor.
I remember playing with moving my hand closer, and further and watching it change from sensed to clear.
Sorry, can't remember which codes now.

I used the Wiki:
http://forum.xda-developers.com/wiki/index.php?title=Samsung_Focus
LCD Test - *#0*#

Ok, mine says No Detection. Is there anyway to set the value?

One other thing to note, about the samsung focus specific update regarding disabling the touch sensitive buttons while in a program, that also isn't working for me either. Not sure if they are related, but thought I'd throw it out there.
And as far as calibrating goes, not sure it would help since the problem only occurs while I'm on a longer phone call. On short ones the proximity sensor works just fine.

If you move your finger closer to the sensor, it should eventually change to Detected. The "set" button at the bottom should set the proximity sensor to the new distance. Mine is around 75.

ArcWhistler said:
If you move your finger closer to the sensor, it should eventually change to Detected. The "set" button at the bottom should set the proximity sensor to the new distance. Mine is around 75.
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Mine says No Dectection. It has Prox Sensor: XXX I've taken my entire hand and covered my phone. NOTHING. When I push SET, It says ProxThreshold :0. Is there anyway to set it manually?

samsung focus post nodo
I believe the prox sensor issue is happening post nodo, I have never had this problem prior to the update... I have been able to fix it temporarily by pulling the battery and starting it up... don't know how long the fix works... got to do some testing... I am wondering if its a power thing as the screen wouldnt work when you plugged it in to power and had on a soft surface....

Still nothing. I didn't want to hard reset since I have Chevron installed. For some reason I did four updates on my phone and don't have a single backup. If I hard reset I'm S.O.L. with Twin Blades and other homebrew apps

What value does it show when you press the Reg button?
I've had issues with my earring tapping the screen while I talk and I had it fixed before NoDo, but the values reset when it was installed, they also appear to be different values now as my screen got supper finicky after the update. I was constantly hanging up or scrolling through multiple pages of stuff with my ear and you could see the screen turning on and off. I ran the proximity calibration while holding my hand in front and set to it to 1.
If it shows xx have you tried setting the value with nothing in front of the phone to see if it will at least zero out?

BooR4dley said:
What value does it show when you press the Reg button?
I've had issues with my earring tapping the screen while I talk and I had it fixed before NoDo, but the values reset when it was installed, they also appear to be different values now as my screen got supper finicky after the update. I was constantly hanging up or scrolling through multiple pages of stuff with my ear and you could see the screen turning on and off. I ran the proximity calibration while holding my hand in front and set to it to 1.
If it shows xx have you tried setting the value with nothing in front of the phone to see if it will at least zero out?
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Click to collapse
It has a big red box. It says No Detection. Prox Sensor:XXX Do I press Set or Reg?

another thing is wrong
seems like my light sensor is fried as well... I am starting to wonder if it's because of bad placement of the usb port... both lay right in front of the port, can't imagine pluging in and unpluging the phone would help if the sensors are right in front. I can't get either sensors to work anymore, even with a battery pull... does anyone else have this issue? goto the diagnosis menu and type
*#05#
you should be able to run through all the tests, I skip the feedback loop... Start at 1 and work your way through.
My Prox sensor says, no sensor XXX, and my light sensor is stuck with a value and will not change even when I cover the sensor... looks like a warranty replacement... how does this work with a sd card installed, the official WP7 ATT certified 8GB? Anyone else have to do this?

rockclimbaudiextreme said:
seems like my light sensor is fried as well... I am starting to wonder if it's because of bad placement of the usb port... both lay right in front of the port, can't imagine pluging in and unpluging the phone would help if the sensors are right in front. I can't get either sensors to work anymore, even with a battery pull... does anyone else have this issue? goto the diagnosis menu and type
*#05#
you should be able to run through all the tests, I skip the feedback loop... Start at 1 and work your way through.
My Prox sensor says, no sensor XXX, and my light sensor is stuck with a value and will not change even when I cover the sensor... looks like a warranty replacement... how does this work with a sd card installed, the official WP7 ATT certified 8GB? Anyone else have to do this?
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same problem here. seems like those two sensors are burned

[Q] Defy+ proximity sensor issue

My defy+ proximity sensor is not working.
As soon as I make a call, the phone screen goes black. The call goes thru fine, but the screen goes black.
No, I don''t have my finger or face near the proximity sensor.
No mods on the phone OS.
I did some debugging-
Cleaned the back of the phone by blowing air.
Tried the screw loosening like in the youtube video
Changed brightness settings from auto to manual.
Changed display turn off from 1min to never.
Finally, I downloded a sensor app and checked for change in the value of the proximity sensor when put by finger in the sensor area. The value was stuck at 3%, no matter what I did.
I was playing around and when I pressed the speaker area near the proximity sensor, the sensor value jumped to 100%
So I think the glass is blocking the sensor (or acting as a reflector).
Just to make sure the glass was the issue, I made a call by keeping the speaker area pressed. It worked as expected - no screen blanking after call. It does go black if I put my finger in the proximity sensor area.
I have no idea how to fix it.The screen & sensor need to be pressed closer.
Only thing I have tried is tighten the screws in the back. But no use.
Any help?

Since you don't have mods, it's probably broken, go to customer care.
Or you can maybe try factory reset

Do you have a screen protector?
Out yes remove it.
If not your sensor is broken.
Sent from my MB526 using XDA Premium 4 mobile app

Issues After Screen Replacement on G2

So a customer has informed me that they are having issues with their G2 after a screen replacement.
The issues are:
-Screen is blurry (obviously will need a new screen)
-Knock on isn't working.
-When she unlocks the phone it sometimes locks itself again.
-Screen does not wake back up when proximity sensor shuts it off during a call.
I am guessing that all of the issues are to do with the new screen.
Any help would be great.

Did you update the touch firmware for knock on? Maybe the proximity sensor not waking up has to do with the modem. Idk I'm a noob to these things but that's my opinion on what's wrong.

Was/is it a genuine LG screen?

robogo1982 said:
Was/is it a genuine LG screen?
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No. It is not a genuine screen. It is an aftermarket screen. I've repaired hundreds and hundreds of phones with third party parts. Never had any issues like this.

the g2 is locked down tighter than apple products. i wouldn't be surprised if the aftermarket screen is a result of all those issues.

resinis said:
the g2 is locked down tighter than apple products. i wouldn't be surprised if the aftermarket screen is a result of all those issues.
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Do you have a more detailed reason behind the issues?

Still looking for some info.

it's the proximity sensor. I put a little piece of electricians tape on the pad that pushes the proximity sensor into the phone screen and that solved all my issues. Message me if you have any questions

markrulesallnow said:
it's the proximity sensor. I put a little piece of electricians tape on the pad that pushes the proximity sensor into the phone screen and that solved all my issues. Message me if you have any questions
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I have the same problem. Could you please be more specific on the solution you found. Would a photo be too much to ask?
Many thanks!

kxanthop said:
I have the same problem. Could you please be more specific on the solution you found. Would a photo be too much to ask?
Many thanks!
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Hi, I had lots of issues with my proximity sensor too, and I just fixed it. Most of the time the sensor would detect an obstacle at 0cm, preventing knock-on and knock-code, making it very hard to unlock the phone and keeping the screen black during/after calls.
My issue was actually a small pad behind the sensor, that's supposed to push it against the screen: that pad was too thin!
Adding some adhesive tape on that pad solved the issue for good! That pad is on the rear buttons assembly (the one that is hold with 7 screws).
More precision about how to fix:
- remove the rear door.
- remove the 7 screws holding the plastic assembly holding the rear button.
- remove the rear button assembly.
- loot at the rear of that button assembly: on the top left there's a small soft pad that's supposed to push the proximity sensor against the screen.
- add some thick adhesive tape on that pad
- put everything back together: put button assembly in place and clip it, put back 7 screws, clip back rear door.

Agree with the crowd, it's the prox sensor. Same thing happened to me when I replaced a screen recently. The tell tale sign is when making a call, the screen will turn off. This is because it's already sensing that the phone is being held up to the user's face when in fact it's a false positive. I believe there's one of two reasons:
1.) Following screen install, the prox sensor is located an incorrect distance from the small window it looks through. In other words its too close or too far away.
2.) The prox sensor is not correctly centered in the window it looks through and needs slightly tweaked up/down/left/right to be perfectly centered.
I couldn't determine beyond a doubt which one of the above was the case or perhaps both. But after taking it apart a few times and tweaking the position of the sensor, mine started working ok and has now been functional for a few months without issue.

markrulesallnow said:
Hi, I had lots of issues with my proximity sensor too, and I just fixed it. Most of the time the sensor would detect an obstacle at 0cm, preventing knock-on and knock-code, making it very hard to unlock the phone and keeping the screen black during/after calls.
My issue was actually a small pad behind the sensor, that's supposed to push it against the screen: that pad was too thin!
Adding some adhesive tape on that pad solved the issue for good! That pad is on the rear buttons assembly (the one that is hold with 7 screws).
More precision about how to fix:
- remove the rear door.
- remove the 7 screws holding the plastic assembly holding the rear button.
- remove the rear button assembly.
- loot at the rear of that button assembly: on the top left there's a small soft pad that's supposed to push the proximity sensor against the screen.
- add some thick adhesive tape on that pad
- put everything back together: put button assembly in place and clip it, put back 7 screws, clip back rear door.
Click to expand...
Click to collapse
Many thanks on the very detailed instructions. I will try them out tomorrow. What I have noticed though, is that I can see the LED through the proximity sensor window, so it might be a misalignment issue as well. Any suggestions on where to buy a new screen for the G2 ( preferably Aliexpress or ebay).

Screen becomes unresponsive to touch frequently

I've searched a good bit and wasn't able to find any information regarding the exact problem I'm having.
Bought a used G6 for starters
No water damage indicated by the sticker
The phone works great on the home screen and app drawer
I turned on dev mode to show touches
When you're in the camera it will stop responding to touches, you can still take pictures using the side buttons. The screen will become responsive again after a couple minutes. This whole time you can take pictures and the screen is functioning just not responding to touch
This happens also when you're loading web pages, even a Google search the screen will stop responding to touch and then eventually start responding again for a short while till you load another page or start moving around the page too quickly it seems. However again the screen is functioning, video previews are playing, just no response to touch.
Loading a game like Asphalt 8 the phone doesn't respond to touches until a couple minutes after the game has been fully loaded.
Even after a hard reset/factory reset the screen will sometimes be unresponsive upon the initial welcome/setup screen and then it will become responsive and you can go through the whole setup without an issue.
Any insight? Any suggestions? If I can't figure it out I'll just get rid of it but it's in great condition a shame it just doesn't function properly.
Thanks in advance!

Looks like some sort of hardware issue...
But before you start to worry...
This might sound like a stupid question but have you tried cleaning your screen with some cleaning solutions?
Sometimes dust mixed with dried sweat can cause severe touch responsiveness issues even if the screen looks like it's clean.

This is an older thread, but maybe I can help someone.
I replaced a touchscreen on a LG G6 and saw that the touchscreen did not work if the back cover was not mounted correctly and the data transfer between the phone and the fingerprint sensor was interrupted. This may be a common problem for users because the connector is small and the back cover is attached with a double-sided tape nearby this connector. It seems that the touch screen is disabled by the phone software without the back cover.

MaBaGeMiFlo said:
This is an older thread, but maybe I can help someone.
I replaced a touchscreen on a LG G6 and saw that the touchscreen did not work if the back cover was not mounted correctly and the data transfer between the phone and the fingerprint sensor was interrupted. This may be a common problem for users because the connector is small and the back cover is attached with a double-sided tape nearby this connector. It seems that the touch screen is disabled by the phone software without the back cover.
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Thank you so much for this comment!
My gf phone had problems lagging and becoming insensitive to touch, the problem got worse and worse, almost never responding anymore. Performed a factory reset etc, didn't help.
After reading your comment I tried pushing on the back cover while swiping. Now I'm able to revive the phone after pushing hard on the top and bottom left corners, of the back cover.
Thanks a mille !

Lg g6 has back panel from glass and under it you have contact for fingerprint sensor.Somehow if the back panel is loose it can cause touch fail,and you cant use the device touch function!
--->FIX:
So you will have to turn screen off using back button,and then try to press back glass on left and right side of the camera lens !
Then simultaneously press the power button and try to use the touch .
If it does not work tru again around camera lens and turn off screen each time you press the back glass!
For me it worked !

LG V35 double tap doesn't unlock screen, always on display doesn't work too - Help!

Hey guys, just got LG V35 updated it to android Pie, everything seemed fine, but i can't normally unlock phone. On main screen i can double tap and it locks, however double tapping again, doesn't unlock phone, as if screen froze. Also fingerprint button doesn't work either, i mean i need to press it twice slowly and only then screen turns on and shows lock screen, always on display also doesn't work. After simple restart those features work, but after a minute, same thing happening again. Also noticed, that if someone calls, screen is also unresponsive. Got phone couple days ago. Any solution ?

Tadziunia said:
Hey guys, just got LG V35 updated it to android Pie, everything seemed fine, but i can't normally unlock phone. On main screen i can double tap and it locks, however double tapping again, doesn't unlock phone, as if screen froze. Also fingerprint button doesn't work either, i mean i need to press it twice slowly and only then screen turns on and shows lock screen, always on display also doesn't work. After simple restart those features work, but after a minute, same thing happening again. Also noticed, that if someone calls, screen is also unresponsive. Got phone couple days ago. Any solution ?
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i had the same issue when i got mine. i think the screen protector i installed was the issue-it only had adhesive around the the edge and started to come off. i returned that one and replaced it with another make and haven't had the "knock on/off" issue since. good luck
tom

tomdi1999 said:
i had the same issue when i got mine. i think the screen protector i installed was the issue-it only had adhesive around the the edge and started to come off. i returned that one and replaced it with another make and haven't had the "knock on/off" issue since. good luck
tom
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I agree with tomdi1999 and also have used the adhesive around the edge screen protector but they interfered with screen touch sensitivity, it is as if having a couple of fingers touching the screen permanently while trying to double tap or unlock the phone via power button. If you have any glass screen protector, try removing the screen protector and double tap again to see if it fixes the issue. If you are not wanting to remove the screen protector first and want to do some troubleshooting, try run touch screen test via the hidden menu (assuming your v35 is AT&T version) by dialing *#546368#*350# (Be warned that some options in this menu can really mess up your phone so don't go around messing with options in this menu randomly) in the phone dialer. In hidden menu select Device Test -> SAAT -> Service Menu - Manual Test -> Touch Draw Test. If, with screen protector on you are having trouble doing this test, remove the screen protector, clean the screen, and do the test again. If you still have trouble with touch screen it is probably a hardware problem or could be software problem but unlikely though. Also, place a test call to someone and slowly place your hand to cover the ear piece and proximity sensor area to see if screen goes dark. This is to check if your proximity sensor is working properly because if it is not then it could be the reason that double tap to wake is not working, although it doesn't explain why your power button is responding slowly, that points toward the phone processor being busy due to ghost touches such as due to bad screen protector or just a faulty power button (but what are the chances of having a faulty power button and double tap to wake going bad at the same time lol?).
I remember that years back on LG G4 double tap function would stop working if you had the screen replaced or sent in the phone to LG for repairs such as repair for notorious bootloop issues and it turned out that there was a small rubber piece that went around the proximity sensor that people were forgetting to put back when replacing screen or doing other repairs which basically broke the proximity sensor. Proximity sensor is suppose to disable screen wake up due to accidental double taps such as when phone is in pocket but if proximity sensor is malfunctioning it will not let phone wake even when you double tap to wake it.
If you figure out what was wrong and/or fixed your issue, please do post back so it can help others. Thanks.
Edit: If you are looking for a good screen protector try Skinomi or Armor Suit wet screen protectors. They are not glass and are a pain to put on but once you install them and let them dry, they are awesome.

It helped me thanks a million!
wouldn't think ever it was the screen protector, thought one of my apps...
I've removed it and it was back to normal.
thanks again