Develop Bugs

HTC desire, magnetic field sensor problem on rooted rom

Recently I rooted my HTC desire and installed the froyo stock rooted rom, the person who published it says that he did not change anything in the Rom however I'm having problems with my magnetic field sensor. The compass app just goes crazy, doesn't point in the right direction plus Google sky maps also does not work. Please correct me if I'm wrong but my theory is that is the magnetic field sensor at fault. Does anyone know how to fix this?
Sent from my HTC Desire using XDA App

you can calibrate by going to compass and waving it in figure 8 direction 3-10 times. this might help the sensor.

compass / gps only works once. root problem?
I am having the exact same problem with my rooted samaung r720 vitality. I am not sure if this problem existed prior to rooting but as I can't get a stock rom or back this one up I can't test it. I can't see why a root would cause this problem but who knows. I also have a problem withe gps it only works once maybe you can try this too. Download gps test put it in airplane mode go outside let it run for 2 mins after getting a fix shut off gps fix/ gps for 2 mins and then start it up again repeat this one more time (3rd time) then report your results.
With regards to the compass if you calibrate it it will work for a shortime but this is soon lost. I only have the problem with horizontal movement not vertical. It seem the calibration/ ofset settings are not being remembered.
Pedro
fixed. used another persons nandroid backup of a stock rom. probably firmware was faulty not from rooting process.

Compass workaround for Telus ICS ROM on Tmo T989

If you have the Telus Rom running on your Tmo GSll, I found a compass with an adjustable azimuth that can be manually calibrated to correct for the polarity issue we seem to be having with this setup.
It is in the market (play store) called smart compass. there are several apps by the same developer in a group called smart tools. There are free and paid versions available so cost isn't an issue. I installed a paid one to support the dev. In the settings is an azimuth adjuster (just like a real compass), and I was able to fix the compass for that app. good enough until a permanent solution comes along.

I think x said to just calibrate your gyro and it fixed it for him..haven't tried it
Sent from my SGH-T989D using xda premium

Teo032 said:
I think x said to just calibrate your gyro and it fixed it for him..haven't tried it
Sent from my SGH-T989D using xda premium
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+1 Calibrating fixed it for me as well.

Did not work for me. Calibrated using GPS Status and still getting North as East.

sbug206 said:
Did not work for me. Calibrated using GPS Status and still getting North as East.
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Click to collapse
Same thing happened for me as well. The Calibrating didn't seem to work. Maybe I did it wrong? But I tried multiple times with the same result.

The sensor in the phone is backwards. I couldn't calibrate it either. Thats why I suggested this app. It has manual calibration that goes beyond the software limitations of the device. It doesn't fix the phone, but it gives you a working compass until we can figure out the problem with the phone.

pjim said:
The sensor in the phone is backwards. I couldn't calibrate it either. Thats why I suggested this app. It has manual calibration that goes beyond the software limitations of the device. It doesn't fix the phone, but it gives you a working compass until we can figure out the problem with the phone.
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It's funny, I just tried this compass and didn't have to configure or calibrate anything. It worked perfectly right away. I am keeping this compass. Only one that has worked correctly so far. Thanks.

[Q] Compass off by 90 degrees

I've noticed on my new S3 that the compass is sometimes off by 90 degrees. Then, if I close the map app and open it later, the compass is accurate.
This this a known issue?
Thanks!

Not sure about this issue but I know there is a way to calibrate the phone somewhere in the settings. Not sure if it will help or is even related but might as well give it a try.

dmobbjr said:
Not sure about this issue but I know there is a way to calibrate the phone somewhere in the settings. Not sure if it will help or is even related but might as well give it a try.
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Click to collapse
I didn't find a compass calibration, although I recall seeing a gyroscope calibration setting hidden somewhere (I'll have to find it again). Would that help at all?
I tried a compass calibration using the GPS Status app, but it didn't seem to help. It's strange. Tried it again on my way into work and it got some of the directions right, but wrong on others. It also seems to improve over time. I almost wondered if it didn't have a magnetic compass and was just using gps signals to guess at your direction. As far as I can tell, there is a real compass in there, although I suppose I can't be sure Samsung is actually using it.

Same problem here...
I'm having the same problem here on all my devices, so i'm thinking it is more likely a bug in android than a hardware issue.
Calibrating the compass with GPS Status (on the play store, can*t post a link yet) helps but never for long... quit google maps or navigation, and on next use I have to calibrate again.
I just verified this one someone else's S5, same there.

Another interesting detail:
I used to have the same issue on my Samsung S3, but with CM on it all is well now... so it really seems to be a software thing.
Sent from my Nexus 10 using XDA Free mobile app

interesting: there's a two year old bug entry about this on google: https://code.google.com/p/android/issues/detail?id=37771
...it has been closed as "obsolete".
nice going there.

[Q] Proximity sensor problem

Hi there, I think my DHD's proximity sensor is not working, i.e. screen is not turning off during calls resulting in disconnections. I installed Android Sensor Box from play store. Its indicating that proximity sensor is present but always at 9 cm even I covered the top portion of the screen. What do you guys suggest, is it a faulty sensor? I am using latest cm10.1 nightly.

Hey have you tested this proximity sensor app?
http://forum.xda-developers.com/showthread.php?t=951858
Sent It From Outer Space.

Thanks for the suggestion, I'll definitely try it and report back.

Hi,
disassemble the phone and clean up sensor
it work for me

I face the same problem and the app also always shows far

Yeah same problem. Its always showing far except 0,0
Sent from my Desire HD using Tapatalk 2

Easy Way Out!
Possible calibration procedure:
1. Put both values high (will show FAR).
2. Cover sensor with finger.
3. Lower High threshold till it says NEAR.
4. Lower Low threshold by a notch or 2.
5. Test behavior.
Different person will guide you different ways.....that's their way to explain,no offence here.And sometimes different ROM could also requires different calibration,best way to do it is mentioned above.
Example: I'm on AoCP my own custom way made look of 4.2.2 kitkat*
I've OK Google working and Everything as stated in KitKat.But obvious im on 4.2.2 instead of 4.4.2!
In this ROM ive sets Lower @ 13 and Higher @15 but it could be different by user to user.
Thanks.

the other sensor test app shows 9.0 cm always

[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?
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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