Fix/Re-calibration for Proximity Sensor/Miscellaneous fixes

[xcxa23]

the first thing i notice after updated to the latest firmware, dme6 or dmf2 is either efs corrupted or in my case is the proximity sensor not working well.

during in-call, the screen off but when move away from face, the screen would remain off.
so i poke around in the system file and found some solution after few days of testing
and now its work very well

the only method works for me is re-calibration via terminal/adb shell
u need to type 'su' without the quotation mark and then follow by the code

echo 0 > /sys/class/sensors/proximity_sensor/prox_cal

by echoing it 0, it force the sensor to reset

echo 1 > /sys/class/sensors/proximity_sensor/prox_cal

by echoing to 1, its actually force the sensor to re-calibrate

my guess is, the calibration value are stored in efs so if there are chances for it to corrupted, there's small chance that the sensor goes haywire, well it happen to me. so i hoping this helps some user that facing proximity sensor.
*ps : okay, so i did some experiment and found that for it to recalibrate properly, it is recommend to do it under a bright environment
So, i decided to put in solution/fixes for those problem that occur on GT-N7100(Galaxy Note II International) that i cant find the solution.
the solution is based on my experience so i DID manage to fix it

**update : another method which i found online, forgotten from where, give a hard blow on the earpiece. i remember saw some user (not from xda) posted that this helps the problem

as reported from user, only working in SAMSUNG stock rom

I tried many times and didn't work, finally I understand! To force recalibration you have to use a stock rom, this method doesn't work on cm aokp and similar.

Inviato dal mio GT-I9505 con Tapatalk

for those having problem for the fix to stick

When i did it, it automaticly stuck to my system. Do it several times. Then it sticks.

Gesendet von meinem GT-N7100 mit Tapatalk 2

for those wanted to run as script (i haven try as i no longer own note 2)
*create a file, copy the syntax below and put it in extSdCard, use script manager to run as SU and at Boot

#!/system/bin/sh
echo 0 > /sys/class/sensors/proximity_sensor/prox_cal
echo 1 > /sys/class/sensors/proximity_sensor/prox_cal

1. After flashing a ROM, you booted it and when you long press the home button, suddenly the system ui force close, but you DID FLASH the rom ACCORDINGLY to the OP's instruction ;

the problem is that the google search apk, aka velvet.apk is missing. the simple solution is go to play store and install google search, or u can download from Playstore GoogleSearch]

​

 

[zeeshanonlyme]

Permission Denied. I think youd have to give su permission first.

Code:

echo 1 > /sys/class/sensors/proximity_sensor/prox_

Typo? Shouldnt it be prox_cal?

Regards.

 

[cadmaster83]

Thank you very much!
You help solve my big problem.

Отправленные с моего GT-N7100 с помощью Tapatalk 4 Beta

 

[xcxa23]

Permission Denied. I think youd have to give su permission first.

Code:

echo 1 > /sys/class/sensors/proximity_sensor/prox_

Typo? Shouldnt it be prox_cal?

Regards.

yup. of cos need to give su permission as we are changing system related file.
sorry. its typo

Thank you very much!
You help solve my big problem.

Отправленные с моего GT-N7100 с помощью Tapatalk 4 Beta

glad that it helped

 

[ykkfive]

I don't have any problem with the proximity sensor, but my gyro sensor calibration doesn't calibrate anymore. however the g sensor works without problem... I traced for the cause but no luck at all

 

[xcxa23]

I don't have any problem with the proximity sensor, but my gyro sensor calibration doesn't calibrate anymore. however the g sensor works without problem... I traced for the cause but no luck at all

have you tried to calibrate by using setting>motion>advance>gyroscope calibration and using the command *#0*#?

 

[ykkfive]

have you tried to calibrate by using setting>motion>advance>gyroscope calibration and using the command *#0*#?

yes, but the result remains the same. I have tried other apps also

here is my calibration test result

 

[gdstheking]

the first thing i notice after updated to the latest firmware, dme6 or dmf2 is either efs corrupted or in my case is the proximity sensor not working well.

during in-call, the screen off but when move away from face, the screen would remain off.
so i poke around in the system file and found some solution after few days of testing
and now its work very well

the only method works for me is re-calibration via terminal/adb shell
u need to type 'su' without the quotation mark and then follow by the code

echo 0 > /sys/class/sensors/proximity_sensor/prox_cal

by echoing it 0, it force the sensor to reset

echo 1 > /sys/class/sensors/proximity_sensor/prox_cal

by echoing to 1, its actually force the sensor to re-calibrate

my guess is, the calibration value are stored in efs so if there are chances for it to corrupted, there's small chance that the sensor goes haywire, well it happen to me. so i hoping this helps some user that facing proximity sensor.
*ps ;/ okay, so i did some experiment and found that for it to recalibrate properly, it is recommend to do it under a bright environment
So, i decided to put in solution/fixes for those problem that occur on GT-N7100(Galaxy Note II International) that i cant find the solution.
the solution is based on my experience so i DID manage to fix it

1. After flashing a ROM, you booted it and when you long press the home button, suddenly the system ui force close, but you DID FLASH the rom ACCORDINGLY to the OP's instruction ;

​

will this resets my ADC to minimum level 0(0,0,0) as now i have 51(51,51,51) as minimum level of ADC...
i have galaxy s4 gt-i9500
will root only this method works otherwise not..

 

[xcxa23]

will this resets my ADC to minimum level 0(0,0,0) as now i have 51(51,51,51) as minimum level of ADC...
i have galaxy s4 gt-i9500
will root only this method works otherwise not..

sorry but what is ADC??
this method only reset proximity sensor value.

 

[gdstheking]

sorry but what is ADC??
this method only reset proximity sensor value.

for a normal sensor minimum valu of ADC is 0(0,0,0) but in my case its 51(51,51,51) {look at the attachment}
View attachment 2337399
my question is will this method resets my adc from 51(51,51,51) to 0(0,0,0).

 

[xcxa23]

for a normal sensor minimum valu of ADC is 0(0,0,0) but in my case its 51(51,51,51) {look at the attachment}
View attachment 2337399
my question is will this method resets my adc from 51(51,51,51) to 0(0,0,0).

now i understand what u meant.. yes it will reset the value to (0,0,0)
i came across this method when my proximity sensor arent working and when checked via *#0*#>sensor, it keep vibrating, showing green screen.
after re calibrate, its okay now.

ps : if you wanted to try my method, i would recommend in a bright environment and make sure nothing is blocking the sensor on the phone (top right)

 

[gdstheking]

now i understand what u meant.. yes it will reset the value to (0,0,0)
i came across this method when my proximity sensor arent working and when checked via *#0*#>sensor, it keep vibrating, showing green screen.
after re calibrate, its okay now.

why calibration is disturbed??

 

[xcxa23]

why calibration is disturbed??

through my research (through online), sometimes is due to dust, if this is the case, just hard blow through the ear piece.
i tried that method, not working.. so i assume it was due to me flashing custom rom and kernel..

 

[gdstheking]

through my research (through online), sometimes is due to dust, if this is the case, just hard blow through the ear piece.
i tried that method, not working.. so i assume it was due to me flashing custom rom and kernel..

i tried air blow but never worked, since i never rooted and used custom roms but still have a faulty sensor..:crying:

 

[ToRvaLDs]

I tried many times and didn't work, finally I understand! To force recalibration you have to use a stock rom, this method doesn't work on cm aokp and similar.

Inviato dal mio GT-I9505 con Tapatalk

 

[xcxa23]

I tried many times and didn't work, finally I understand! To force recalibration you have to use a stock rom, this method doesn't work on cm aokp and similar.

Inviato dal mio GT-I9505 con Tapatalk

ok.. noted.. thanks for the info..

 

[Dexter666]

The second option worked for my n7100, thank you very much!!!!!

 

[gdstheking]

The second option worked for my n7100, thank you very much!!!!!

will this work on i9500?

 

[Dexter666]

will this work on i9500?

Well it is a sensor recalibration command, so I would give it a shot and try, shouldn't do any harm.

 

[gdstheking]

can u provide ur prox_cal file using root explorer??

---------- Post added at 01:33 PM ---------- Previous post was at 12:58 PM ----------

the first thing i notice after updated to the latest firmware, dme6 or dmf2 is either efs corrupted or in my case is the proximity sensor not working well.

during in-call, the screen off but when move away from face, the screen would remain off.
so i poke around in the system file and found some solution after few days of testing
and now its work very well

the only method works for me is re-calibration via terminal/adb shell
u need to type 'su' without the quotation mark and then follow by the code

echo 0 > /sys/class/sensors/proximity_sensor/prox_cal

by echoing it 0, it force the sensor to reset

echo 1 > /sys/class/sensors/proximity_sensor/prox_cal

by echoing to 1, its actually force the sensor to re-calibrate

my guess is, the calibration value are stored in efs so if there are chances for it to corrupted, there's small chance that the sensor goes haywire, well it happen to me. so i hoping this helps some user that facing proximity sensor.
*ps ;/ okay, so i did some experiment and found that for it to recalibrate properly, it is recommend to do it under a bright environment
So, i decided to put in solution/fixes for those problem that occur on GT-N7100(Galaxy Note II International) that i cant find the solution.
the solution is based on my experience so i DID manage to fix it

as reported from ToRvaLDs, only working in SAMSUNG stock rom




1. After flashing a ROM, you booted it and when you long press the home button, suddenly the system ui force close, but you DID FLASH the rom ACCORDINGLY to the OP's instruction ;

​

permission denied??????what to do