Develop Bugs

[Q] Samsung Galaxy Note 2 Motion Sensor and Gyroscope not working

hi i just recently bought a galaxy note 2 phablet, im very happy with it every thing works perfectly fine, however i did come across a slight problem which is bugging me alot, as i loaded the phone up it shows you all the tutorials and stuff, for panning and zooming in using motion control.... i did not realise the problem before as i was really happy to just get the phone after so long, My motion sensor and gyroscope functions are not working
i have tried everything from factory reset to restarting , taking the battery out and putting it back in, has anyone stumbled upon this problem, and is there a solution to this problem, whether this is a software glitch/problem or a hardware issue. if anyone can help me please and thanks in advance

*#0*# check there if they are working.
Sent from my GT-N7100 using xda premium

mariosraptor said:
*#0*# check there if they are working.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
hi thank you for the quick reply, i had a look at what you asked me to do and i did manage to find all the settings, however it looks to me everything is working apart from the light sensor one, all the other settings came up as a PASS apart from the light sensor which came as level 0, which i dont know what that means, while i was on the sensor screen i swiped my hand across the sensor and the screen shifted colour from white to yellow, which is a good indication that it is working , however i went back on the operating system and tried the palm swipe and it did not work, niether did the quick glance, and the pan to zoom features are not working either, i did test the gyrocope settings and it came out as a PASS too, could you explain maybe why this may be happening and what does the level 0 on the light sensor option means, please and thank you , i really do appreciate it.

Lavel 0 says to all phones I have tried including mine. As long as the LUX changes it is working.
Now for your primary problem try to recalibrate gyroscope.
Do it by going settings-motion-advanced settings-gyroscope calibration.
If that does not help try clearing cache in recovery.
If that does not help then backup and try reflashing your rom.
Sent from my GT-N7100 using xda premium

darkgallion said:
hi i just recently bought a galaxy note 2 phablet, im very happy with it every thing works perfectly fine, however i did come across a slight problem which is bugging me alot, as i loaded the phone up it shows you all the tutorials and stuff, for panning and zooming in using motion control.... i did not realise the problem before as i was really happy to just get the phone after so long, My motion sensor and gyroscope functions are not working
i have tried everything from factory reset to restarting , taking the battery out and putting it back in, has anyone stumbled upon this problem, and is there a solution to this problem, whether this is a software glitch/problem or a hardware issue. if anyone can help me please and thanks in advance
Click to expand...
Click to collapse
Hello in response to your issues with the motion sensor. Have you installed a screen protector on your note 2? i noticed that after installing the screen protector on my Note 2 some of the motion actions did not work properly. So if you do have one on remove it and see if that corrects the issue. :good:

Useful help.
This was a very Useful thread, thanks. I've done the tests and came up vitha a fail when i tried my motion sensor. Is it likely to be broken? I'm going to reset to factory settings and pull of my screenprotector and se what happens before i do anything else. Is there anyone out there who has replaced the motion sensor? Is it soldered to the main board? Hard to replace?
Thanks beforehand. Tommie.

i thnk my sensor is nt wrkin... when i do the test, d color is alredy green nd isnt changin nd is vibratin continuosly?? is it broken or somthng lyk dat??

note 2 sensor help
mariosraptor said:
*#0*# check there if they are working.
Sent from my GT-N7100 using xda premium
Click to expand...
Click to collapse
can't get quick glance to work
*#06*# does nothing on my note 2 why? Sensor not working was but stopped for some reason?:crying:

Samsung Galaxy Note 2 Motion Sensor and Gyroscope not working
hi my samsung note 2 was working well for last 2 years bur recenrtly its motion sensor has stopped working.
i have checked all settings, it isnt working at all..
gyroscope and motionsensor tests are fail on checking. please help me, what to do?

I have had the exact same issue. The only way to fix it is to get the whole motherboard replaced. I went into Samsung store and they said that. Issue here is that it costs £145 to replace the main board. The sensors are on the main board itself and that is why it costs a lot to fix. I've been using my Note 2 with no gyroscope for a few months now, going to buy a new phone. Rather buy a brand new phone than get it fixed

just loosen the screw nearest to the microsd card. motion sensor is under it. it work on my phone.

gyroscope sensor
Hi,
my gyroscope is burned and i buy it and now i opened my phone and i don't know how to replace it. Any help is welcome...

haakhan said:
just loosen the screw nearest to the microsd card. motion sensor is under it. it work on my phone.
Click to expand...
Click to collapse
Yeahhh!!!
You are a Hero! I tried nearly everythink since January 2016! I took the screw out, shut down my phone, put it into download mode and pull the battery out.
Im not shure if a restart would do it alone, i did all to be shure. And it now works again. My srew was magnetized! Maybe that was the reason or the chip has
a loosen contact.
Up to now it works great! I thought my sensor was dead.

Desire HD Proximity Sensor Replacement

Hi all i have a DHD with a screwed failed Proximity sensor and was wondering if it can be replaced.
I have looked at all the videos of tear downs, done the calibration the works and Sensor doesn't work at all not even it its factory stock rom.
So how does one go about replacing that part if its possible.
I very much doubt it will be as simple as replacing the casing.
Please help.

hacktrix2006 said:
Hi all i have a DHD with a screwed failed Proximity sensor and was wondering if it can be replaced.
I have looked at all the videos of tear downs, done the calibration the works and Sensor doesn't work at all not even it its factory stock rom.
So how does one go about replacing that part if its possible.
I very much doubt it will be as simple as replacing the casing.
Please help.
Click to expand...
Click to collapse
I have the exact same problem, phone has been flawless for 2+ years. Was away on holiday recently and used the night clock mode, power attached with the phone in landscape mode - following morning, no more rotation, calibration tool doesn't register anything, other market proximity tools show a sensor present but don't function.
Cleaned the sensor with a fine brush, no change, re-flashed a couple of roms with full factory reset, no change.
I can only assume the sensor has failed - shame this phone has been excellent - especially with the dedicated ROM community behind it.
I am now facing a full tear down next to try and clean the sensor fully, although suspect this will make no difference.
Can the proximity sensor be sourced as a part, or does anyone have any other suggestions/ things to try?
UPDATE: Following the guide on this thread fixed it for me!

[Q] Dead Sensors

Hi there everyone,
I've been a long time reader but first time poster hehe
I just got a slightly used Note 3 (build N900TUVUBMI7) and upon checking that everything was working properly I noticed some issues with the sensors, so I checked by dialing *#0*# and this is what I got on the Sensor tab: (you can see it in the attached picture) All the values are at ZERO!
I know chances are I just got broken hardware, but if that's not the case, are there are software solutions I could try to restore Sensor functionality?
Thanks.

Draktalah said:
Hi there everyone,
I've been a long time reader but first time poster hehe
I just got a slightly used Note 3 (build N900TUVUBMI7) and upon checking that everything was working properly I noticed some issues with the sensors, so I checked by dialing *#0*# and this is what I got on the Sensor tab: (you can see it in the attached picture) All the values are at ZERO!
I know chances are I just got broken hardware, but if that's not the case, are there are software solutions I could try to restore Sensor functionality?
Thanks.
Click to expand...
Click to collapse
Did you put your hand over the sensor to see if the value change?

I just checked one out, that had the same problem. In that case, the previous owner had replaced the screen and damaged the front camera with the sensors. Camera is very easy to replace and cheap. But he'd also broken off two contacts on the motherboard, which must have had a role in the sensor control. Got the camera working again, but not the sensors. If you can't return the phone, it might be worth buying a replacement front camera with sensors, but maybe open it up first, and see if anything is loose or disconnected.
Sent from my SM-N900T using Tapatalk

[Q] Do all your sensors work?

I have recently got my phone back from repair and I have done some tests on it. It seems the magnetic sensor isn't working, most compasses don't work and ones that do are way off and seem to be using the gyro not the magnetic sensor. Hardware test apps report the sensor as there but no readings. Also the pedometer does seem to work either in the fitbit app as it does not register any steps.
I have used the Sensor List app from the store and these seem to be the only 2 not working. Is this just me or does anybody else have this problem?

ashyx said:
I have recently got my phone back from repair and I have done some tests on it. It seems the magnetic sensor isn't working, most compasses don't work and ones that do are way off and seem to be using the gyro not the magnetic sensor. Hardware test apps report the sensor as there but no readings. Also the pedometer does seem to work either in the fitbit app as it does not register any steps.
I have used the Sensor List app from the store and these seem to be the only 2 not working. Is this just me or does anybody else have this problem?
Click to expand...
Click to collapse
just you mate all mine working fine

What did you use to determine they are working? I have used the native hardware test using the code *#*#3424#*#* and it seems to fail there too. Apparantly the hall sensor test which is the magnetic sensor is supposed to show the clock when a magnet is put near a blue square on the screen. On mine it doesn't, but instead it turns the screen off and I can hear a click . However the magnet is fairly powerful so it maybe affecting something else. There doesn't seem to be a pedometer test and all the other tests seem fine.
Thanks

Magnetic Case Sensor broken (?) - Device keeps locking up

Hello there,
My Flo-Device keeps locking me out, resulting in a short black screen and throwing me back to the lockscreen. Based on the behaviour it seems that this is related to the sensor that is use for magnetic cases.
Unfortunately, I never used such a case, most threads I found are talking about cheap cases with a poor placing of the magnet itself - which does not help me out here.
Any hints on overriding that sensor by software or hardware? Any way of fixing the sensor or even a hint on the location on the Motherboard? I have read about an exposed module disabling it, but to configure the module it may be neccesary to be able to use the tablet in the first place. Currently it is still completely stock.
I appreciate your help or any reference to a solution that I may have overseen in my search. Thanks!

AeroplaneMode said:
Hello there,
My Flo-Device keeps locking me out, resulting in a short black screen and throwing me back to the lockscreen. Based on the behaviour it seems that this is related to the sensor that is use for magnetic cases.
Unfortunately, I never used such a case, most threads I found are talking about cheap cases with a poor placing of the magnet itself - which does not help me out here.
Any hints on overriding that sensor by software or hardware? Any way of fixing the sensor or even a hint on the location on the Motherboard? I have read about an exposed module disabling it, but to configure the module it may be neccesary to be able to use the tablet in the first place. Currently it is still completely stock.
I appreciate your help or any reference to a solution that I may have overseen in my search. Thanks!
Click to expand...
Click to collapse
Hall effect sensor's location is on the first attachment. I can assure you that there is no need to fix it directly because this and many other sensor problems are caused by the LCM connector. Disconnect the battery and just re-seat the LCM connector but be careful, watch this first https://www.youtube.com/watch?v=C9PwK9eGrCY

k23m said:
Disconnect the battery and just re-seat the LCM connector
Click to expand...
Click to collapse
Thanks for the fast reply and for pointing out the sensors' location on the PCB. Unfortunately, this did not solve the problem. Do you have any other ideas?

AeroplaneMode said:
Thanks for the fast reply and for pointing out the sensors' location on the PCB. Unfortunately, this did not solve the problem. Do you have any other ideas?
Click to expand...
Click to collapse
Please also re-seat the other end of LCM cable.
Check if a magnet placed over the sensor's position (top or bottom) has any impact.
Perhaps ROM builders know if something can be changed in /system/build.prop
Remove lock password - start ADB and do:
rm /data/system/locksettings.db
rm /data/system/*.key
Finally, we'll consider a hardware mod.
:good:

I already reseated both end of the ribbon cable to be sure - and again after the first unsuccessful test run. I never used a magnetic case on the device and there ar no other magnets near - my other Nexus 7 is fine though
What exactly does the locksettings.db do? I deleted It and rebooted, but no change in behaviour.
btw, as I am unable to properly use the touchscreen, I tried to enable usb debugging via an usb-otg cable and an attached mouse - which worked fine so far. It seems that there might be some interference or mechanical problem. Maybe the first thought with the hall sensor was wrong track I repaired a lot of devices over time, but (un)fortunately none of them showed that behaviour before, so I'm somewhat out of ideas in this case.

AeroplaneMode said:
What exactly does the locksettings.db do? I deleted It and rebooted, but no change in behaviour.
....
I repaired a lot of devices over time, but (un)fortunately none of them showed that behaviour before, so I'm somewhat out of ideas in this case.
Click to expand...
Click to collapse
It removes the lock password and makes it go into LOCKSCREEN-NONE mode, but you have to also remove all files with the ".key" extension from the folder.
Since you repair such devices, then measure voltage on the output pin of the sensor, and measure it again with a magnet over it.

Good idea. Without the magnet I get 2.98 V and with the magnet 0.001 V between GND and out. So I guess the sensor itself may not be the problem? As I recognized that it might be a mechanical problem, I got a friend to use the touchscreen and measured output at the sensor again, it seems to work as intended.
As the lockscreen does not have any further protection set up after a factory reset, I guess this could be the reason that I did not find any *.key files in that directory? So currently it is just 'swipe to unlock'.
Problem with the lockseetings file is: The device is all stock, locked and has no root - and to get a bit more weird, is not recognized when in recovery. My other Nexus 7 with twrp already on it is recognized instantly. I may have to fix that first, as in a weak moment I may have overseen the "access denied" while trying to delete that file and already typing the nex command. My bad - it was already late.
Honestly, I wonder what the problem really is and really appreaciate your help so far.

AeroplaneMode said:
Good idea. Without the magnet I get 2.98 V and with the magnet 0.001 V between GND and out.
.....
As the lockscreen does not have any further protection set up after a factory reset, I guess this could be the reason that I did not find any *.key files in that directory? So currently it is just 'swipe to unlock'.
.........
Problem with the lockseetings file is: The device is all stock, locked and has no root - and to get a bit more weird, is not recognized when in recovery.
Click to expand...
Click to collapse
The sensor is OK indeed.
As you did factory reset, there is no issue of user data loss anymore, so just unlock it and do factory flash https://developers.google.com/android/images
This should fix the recovery recognition problem too.

Yeah, so I unlocked it, reflashed it with the stock rom, installed twrp and su...and finally got to delete the mentioned files. But still - the issue continues to exist. Also, I see no difference after deleting the files. Does something else prevent that no locksreen-mode?
Do you have any more ideas? I could wildly start changing parts, but unfortunately the device isnt worth that much anymore :-/ As mentioned, using the device with the Mouse hooked up via otg, the screen behaves normal.

AeroplaneMode said:
the issue continues to exist. Also, I see no difference after deleting the files. Does something else prevent that no locksreen-mode?
....
Do you have any more ideas?
Click to expand...
Click to collapse
No worries, we'll fix it, but it seems that my opening statement "this and many other sensor problems are caused by the LCM connector" still holds true. On the schematic, R150 and R151 are presumably located next to the sensor on the daughterboard, so if LCM cable connection to main mobo is open, the CPU will constantly sense 0V level, right? And as you measured earlier, 0V means that magnetic flux is detected. Now, about the ribbon cable... you did re-seat it, but this thing is awful and tends to fail repeatedly because of contact oxidation and weak connector lock pressure. Two solutions:
spray with https://www.amazon.com/CRC-5103-Quick-Electronic-Cleaner/dp/B000BXOGNI/
apply a thick tape/spacer over the lock so N7's back cover will add extra pressure on it
Finally, here is a brute-force workaround fix, go: settings - system profiles - default - lock screen - disable :highfive:

I'll test the points you mentioned.
I have to get a can of cleaning spray in the workshop, as I only have other fluids here which leave a oily coating. Or Brake Cleaner Fluid Thanks so far, I'll keep you updated.
Disabling the Lockscreen still gives me blackouts but okay, i dont have to swipe anymore - that will do for the moment. I haven't had similar problems in a while, so I tend to forget some points as repairing phones from time to time is only some sort of occupational therapy for me besides my other work ^^

k23m said:
[*]spray with https://www.amazon.com/CRC-5103-Quick-Electronic-Cleaner/dp/B000BXOGNI/
[*]apply a thick tape/spacer over the lock so N7's back cover will add extra pressure on it
Click to expand...
Click to collapse
I was finally able to continue here. I cleaned the connection and applied some tape to thicken up the spacers. Still, I am not able to resolve the problem. I also tried to manually apple more pressure on the back, still not getting better unfortunately.

AeroplaneMode said:
I was finally able to continue here. I cleaned the connection and applied some tape to thicken up the spacers. Still, I am not able to resolve the problem. I also tried to manually apple more pressure on the back, still not getting better unfortunately.
Click to expand...
Click to collapse
I know you're not happy about it but this is the best N7 hardware issue to resolve we've had so far this year
I opened up my N7 to check the sensor's connection to main PCB - it goes to LCM pin #41 - note the attached pictures. Disconnect the battery and use an ohmmeter to measure the two points - I get around 8 oHm. If you measure open circuit, then look for broken or corroded track somewhere along the way. If you measure proper connection, then the problem is on the motherboard and there is nothing else we can do - case closed unfortunately.
/EDIT
Here is a software workaround:
install ElementalX kernel
during installation select the "Disable magnetic cover on/off" option
:victory:

k23m said:
I get around 8 oHm.
Click to expand...
Click to collapse
I get 3 Ohms, so I flashed the suggested Kernel. It seems to solve the problem, won't get any better I guess. Thanks for your support!
k23m said:
I know you're not happy about it but this is the best N7 hardware issue to resolve we've had so far this year
Click to expand...
Click to collapse
Now is that a good thing? :silly: