01-29-2018 03:55 PM
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  1. Coogah's Avatar
    Bought a Note 8 around Black Friday and I've got a weird glitch that I'm not sure falls under warranty or is due to faulty programming.

    It's happened three times now where adjusting the slider when the auto brightness option is on will not change the brightness. This is not an auto brightness issue as I can restart my phone and move the slider to change the brightness setting when the option is on.

    Secondly when this issue happens when I'm on a phone call the screen will not shut off when I'm holding the phone to my ear. This happened three times as well during three separate calls. Once again the problem was remidied with a reboot.

    Since the problem is resolved with a reboot I'm concerned this is due to programming and may not be a hardware issue that would warrant a new phone. Anyone else have this problem?
    12-04-2017 03:03 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Do you have a screen protector on, or a case with a prominent lip at the top of the phone?
    12-04-2017 04:09 PM
  3. Coogah's Avatar
    Thank you! No screen protector, but I do have a clear case with a lip. However the case stops well short of the sensors in the front. It stops just over where the bezel and screen meet.
    12-04-2017 04:31 PM
  4. B. Diddy's Avatar
    Can you show us a picture of the top part of the phone? The proximity sensor is typically right next to the front-facing camera, so if the case goes up to where the bezel and screen meet (which is below the front-facing camera), then it might still be blocking the sensor.
    12-04-2017 08:00 PM
  5. Lepa79's Avatar
    Run the phone with a case for few hours at home to see if behavior changes
    12-04-2017 08:13 PM
  6. Lepa79's Avatar
    Also, make sure you go into Auto Britness setting and "Reset Usage Patters". I think your problem will go away when you reset this.
    kevinpleasants likes this.
    12-04-2017 08:15 PM
  7. Coogah's Avatar
    Auto brightness sensor/Proximity Sensor not Working-img_7832.jpg
    Auto brightness sensor/Proximity Sensor not Working-img_7834.jpg

    Here's a couple of quick pics I snapped. I'm not convinced it's an auto brightness issue as it affects the proximity sensor's function as well when I'm making a call; but I guess I can start with resetting usage patterns.
    12-04-2017 10:33 PM
  8. chanchan05's Avatar
    First thing I'd do in your problem would be to go to the Samsung service menu. Bring up your dialer and type *#0*# with no spaces. It will bring up the service menu. Tap sensors. If you cover the proximity sensor, the phone should vibrate and the screen turns green if it's working properly. Then tap on light sensors. It should tell you the lux levels of light it detects. If you're covering the light sensor completely it should read zero, and a higher number depending on light intensity.
    Tim1954 likes this.
    12-04-2017 10:47 PM
  9. Coogah's Avatar
    I'm not able to get into the service menu with my Verizon phone. :/ I'm running stock ROM, not rooted, and have the latest Verizon updates.
    12-04-2017 11:24 PM
  10. chanchan05's Avatar
    I'm not able to get into the service menu with my Verizon phone. :/ I'm running stock ROM, not rooted, and have the latest Verizon updates.
    Oh. That's weird. Why would they remove that?

    Well then try a system cache wipe using the boot menu. If that fails you should try running safe mode. If it still persists then, a factory reset. If it still happens, then you have it replaced.

    Of course you can skip all that and go get it replaced immediately.
    12-04-2017 11:40 PM
  11. Coogah's Avatar
    I did some more digging and apparently Verizon likes to lock their phones up as tight as they can and took this menu away from us. Boo.

    Currently trying no case + fresh auto brightness reset to see if anything comes of that then I'll try the system cache wipe. Haven't had to give back a fresh phone before, do you think they'd give one out for something I can't replicate on command?
    12-05-2017 12:34 AM
  12. chanchan05's Avatar
    I can't say about Verizon's return policies. I'm not in the US. I also don't get my phones delivered, always selecting the option to pick it up at my carrier's store. They open the box in front of me and show me that everything in the service menu check is working properly before handing it over.

    Without that service menu access for you, you can't say if it's hardware or software without doing a lot of stuff.
    12-05-2017 01:04 AM
  13. B. Diddy's Avatar
    You could try a 3rd party app to test the sensors, like Sensors Test.

    I misunderstood how you described the case -- you had said it went down to the where the bezel meets the screen (which would be the top edge of the screen itself, not where the metal meets the glass at the very top of the phone -- in phone parlance, bezel refers to the blank border between screen and the edge of the phone). If that were true, that would mean the case would be covering both the proximity sensor and the front-facing camera, which wouldn't make much sense.
    12-05-2017 01:39 AM
  14. Coogah's Avatar
    Ah, gotcha! I wasn't quite sure what it was at first; but now that I have my case off it does just look like it's the metal band around the phone. I'll check out those sensor apps and see what they say.

    Kind of a bummer Verizon disabled, maybe the can access it in store and run these tests too. :/
    12-05-2017 01:52 AM
  15. Lepa79's Avatar
    Also, make sure you go into Auto Britness setting and "Reset Usage Patters". I think your problem will go away when you reset this.
    Did you try this yet? Mine was not working until I reset the usage pattern
    12-05-2017 07:36 PM
  16. Coogah's Avatar
    Did you try this yet? Mine was not working until I reset the usage pattern
    So far it has been working. It doesn't fail me on a daily basis, so I'll try to update the thread if it does happen again.
    12-07-2017 02:49 PM
  17. Coogah's Avatar
    Today it just went buggy on me again. I went outside, used the fingerprint sensor to unlock, and the brightness wouldn't adjust to the sunny condition. I tried using the slider and no luck either. So I went into the sensor app I downloaded and suddenly the brightness kicked up like opening the app somehow forced it to work. So I didn't have to restart the app this time in order to get it to work again. I also wasn't able to check the proximity sensor during a phone call because the app kickstarted things.
    12-09-2017 01:28 AM
  18. B. Diddy's Avatar
    Have you already tried the cache wipe that @chanchan05 suggested? It never hurts to try: https://support.t-mobile.com/docs/DOC-36229. It would also be interesting to see if the problem goes away in Safe Mode: https://support.t-mobile.com/docs/DOC-36242
    12-09-2017 01:40 AM
  19. Coogah's Avatar
    Haven't tried that yet. I was trying a suggestion at a time so I could try to narrow down the problem/solution. It's kind of a slow process because it doesn't happen all the time and I can't figure out what triggers it.
    12-09-2017 02:02 AM
  20. Coogah's Avatar
    So it happened again late last week. So I gave it a cache wipe. It happened again yesterday (first time after the wipe). Interestingly it happened last night and had persisted through a wireless charge. The screen also randomly came on during the night and wouldn't shut off until I shut it off. The proximity sensor is also affected again. I made a call on the phone and the screen wouldn't shut off when I put it near my ear. About 5 seconds after ending the call, the screen randomly came on again showing the dialer.

    So I'm bringing it in today to a Verizon store and seeing what they will do as far as warranty replacement.
    B. Diddy likes this.
    12-17-2017 12:27 PM
  21. B. Diddy's Avatar
    That's a nuisance. Sounds like the best thing to do at this point -- hopefully the replacement works flawlessly!
    12-18-2017 10:56 AM
  22. The lastest's Avatar
    I have the same issue, none of the sensors work, i mean proximity, gps, auto brightness, and gyroscope don't work on my Galaxy note 8.
    Does anybody know what should i do?
    I also rebooted my phone.
    When i am on Google maps, and turn the location sensor on, suddenly the phone finds the location, after that, the sensors doesn't recognize the location.
    it also happens for auto brightness sensor, when i unlock the phone, it works, suddenly it stops working and doesn't change.
    I tried *#0*# none of the sensors values are changing.
    I don't know what the problem is? Is it about the software or the hardware?
    I updated the phone, did factory reset, wiped all the data, but nothing's happened.
    12-26-2017 02:19 PM
  23. mrjuwono's Avatar
    I did some more digging and apparently Verizon likes to lock their phones up as tight as they can and took this menu away from us. Boo.

    Currently trying no case + fresh auto brightness reset to see if anything comes of that then I'll try the system cache wipe. Haven't had to give back a fresh phone before, do you think they'd give one out for something I can't replicate on command?
    I have a similar issue. I'm with Verizon as well, so I guess accessing a service menu isn't an option.
    My auto brightness seems to work with my case off the phone (similar to your case). A Samsung rep assured me that there is only one sensor, next to the self facing camera.
    As a test, I only put the case partially on, so that the top of the phone was fully exposed, but the brightness still remained the same.
    However, when I put the case partially on, so that the top was in, and BOTTOM was exposed, the brightness changed.
    This left me wondering if there are multiple sensors, or the sensor is at the bottom of the phone instead.
    It would be great to narrow down the culprit. Let me know if you have the same issue, when recreating the same experiment.
    12-30-2017 05:12 PM
  24. Coogah's Avatar
    I have the same issue, none of the sensors work, i mean proximity, gps, auto brightness, and gyroscope don't work on my Galaxy note 8.
    Does anybody know what should i do?
    I also rebooted my phone.
    When i am on Google maps, and turn the location sensor on, suddenly the phone finds the location, after that, the sensors doesn't recognize the location.
    it also happens for auto brightness sensor, when i unlock the phone, it works, suddenly it stops working and doesn't change.
    I tried *#0*# none of the sensors values are changing.
    I don't know what the problem is? Is it about the software or the hardware?
    I updated the phone, did factory reset, wiped all the data, but nothing's happened.
    Sounds like you may need to contact Samsung about getting work done on your phone. As it is a new phone, it should be covered under warranty.
    01-03-2018 11:33 PM
  25. Coogah's Avatar
    I ended up sending in the phone to Samsung for warranty work. Because a reset would fix the issue I was nervous that they wouldn't fix anything. They ended up diagnosing and replacing a bad proximity sensor. So I hope that's all there is to it.
    01-03-2018 11:40 PM
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