yashsingh1/xdaforums huggingface dataset:
[Nexus 5 Q&A, Help & Troubleshooting] reddragon72:
Ok so here is the deal....

I think I have found the issue. THINK I have...

When my phone is cool GPS works fine, after about 6-10 min GPS will drop. So I got ready and plugged the phone in and the issue got worse to the point I could not longer get a lock and the phone was significantly hotter.

There is this video https://www.youtube.com/watch?v=QBpNtWvY454 that talks about the contacts to the antenna. So I tried my phone again when it got hot GPS dropped, when it did I sqeezed that part of the phone and WOW it came right back and stayed!!!

So I am going to do the contact fix to see if that helps.

Theory behind this.... KK did not let the phone get as hot so we did not see the issue or those that did never reported it because it was far and few in between. So I believe this is a Lollipop issue but not due to the GPS files or the module but because the phone gets hotter when running apps. I can attest that my battery drains significantly more in lolllipop than KK.

If you don't want to wait for me to try this or if someone wants to test it then please do and report back. Google may not be seeing it in thier "controlled environment" .
[Nexus 5 Q&A, Help & Troubleshooting] cocous:
My friend this is difficult to be true.

I used on kitkat the gps with split screen navigon and gps plus and screen recorder from behind to see the results after and the temperature be up to 70°c sometimes without signal drops.

With lolipop i have signal drops with 55°c .

For me it isnt hardware but software problem and google must do something about this.

I have the G3 D855.
[Nexus 5 Q&A, Help & Troubleshooting] reddragon72:
Was this moving or standing still? I never tested just setting only while in the car, read on for why I ask.

I just performed the antenna mod and seen a nice signal boost but still getting a better signal when applying pressure to the back of the phone on the antenna connectors. I ran the phone for 2 hours on my porch and never lost a lock. I will be testing again tomorrow while driving.

UPDATE: So drove today for 1 hour each direction covering 81 miles total with two stops. GPS locked VIA Waze and never lost lock. Also to note that sitting at lights the GPS did not wonder and change directions as it did before.

All I did was opne the phone and place a piece of paper under the antenna contacts as well as cutting off the little tab. Signal test showed a 50% improvement in quality as well as two to three satellites showing in green and the rest in high yellow VIA GPS Test application from the playstore.

I will be out again tomorrow and will test out the app again. Note this was plugged in an charging the whole time.

Say what you will but there is something to this.
[Nexus 5 Q&A, Help & Troubleshooting] C3C076:
Just to share my experience. For me, it looks like adding "supl" in APN settings helped. (Orange Slovakia).

Was getting frequent drops in Waze app, but now no single drop during 30km city drive. Too early to say but I will be testing it more during upcoming days.

Looks promising, though.
[Nexus 5 Q&A, Help & Troubleshooting] dmatik:
Exactly the same for me
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
I really hope you can solve your problems just adding supl to apn type... My experience is that after doing that I got some days of stability, but in the end it began dropping signal again... :(

In fact, every fix I've tested has "stabilized" GPS for some days... but it comes back every time... :(
[Nexus 5 Q&A, Help & Troubleshooting] Tantum1:
5.1.1

Hi folks - do you know whether 5.1.1 fixes this? I've read some change logs but it doesn't look like this issue was addressed.
[Nexus 5 Q&A, Help & Troubleshooting] cocous:
We hope my friend. I have Lg g3 D855 and when i tried the 5.02 never had drop signals. Only with 5.0.
[Nexus 5 Q&A, Help & Troubleshooting] Tantum1:
I reverted back to 4.4.4 but I'm still not satisfied...I think that the last time I did not have any GPS drops was with 4.4.2

Any rumors re. the roll out of 5.1.1 - I see that a bunch of devices already got this update?
[Nexus 5 Q&A, Help & Troubleshooting] onesolo:
To the ones that already have the 5.1.1, tell us if if finally fixes something... there's a new radio on it...
[Nexus 5 Q&A, Help & Troubleshooting] cocous:
I try it on LG G3 D855 and the problem is still exist.
[Nexus 5 Q&A, Help & Troubleshooting] onesolo:
?? we are on th N5 forum... the 5.1.1 that was released is specific to this device... it could contain some fixes (via radio for example)...
[Nexus 5 Q&A, Help & Troubleshooting] cocous:
I know my friend. I say my experience because the problem is exist on most devices.
[Nexus 5 Q&A, Help & Troubleshooting] borgsta:
Didn't realise the G3 already had 5.1.1 though.
[Nexus 5 Q&A, Help & Troubleshooting] cocous:
I know but i flash 5.1.1 cm12 and i have the same problem.

With kitkat never had this.
[Nexus 5 Q&A, Help & Troubleshooting] Tantum1:
Thanks for the analysis - I can confirm a similar behavior.

This is happening across many devices, not just N5 so I'd assume that this is a SW issue.

Also a lot of people are reporting that in the airplane mode their Navigation works fine...which could be in line with your findings as I don't think that in airplane more any AGPS data is downloaded from the carrier and also no other elements are used for obtaining the position (such as WiFi)

In my case the GPS signal is lost significantly more often while on roaming (every 5 mins or so) and that could also indicate that the phone tries to get AGPS data from the cell towers but the roaming setting somehow does not allow it to do so....but this is just my theory
[Nexus 5 Q&A, Help & Troubleshooting] Roffus:
I've made the ota update to lollipop 5.1.1 and the GPS seems to be solved.

I've tried only for a few km, but the gps fix is almost instantaneous and never dropsout.

I'll keep you up to date when I'll made deeper tests.:good:

During the update the N5 log something like "updating radio..".

It could be this that maybe solve the issue.
[Nexus 5 Q&A, Help & Troubleshooting] FFU5y:
Thanks for the response.

Just to confirm: what you're seeing is that when you lose your GPS signal and you view the list of satellites using a relevant app (e.g. GPS Test, GPS Status & Toolbox) what you see is that there are no satellites in view (or very few), in comparison to when it is working and there are many in view?

That is, after the GPS dropout (right after, I mean)...

in GPS Test it looks like this (i.e. few or no satellites listed)

or this:

not like this (many satellites listed)

Or in GPS Status & Toolbox, it looks like this (Fix/Sats = 0/0)

not this (Fix/Sats = doesn't matter / larger number)

In contrast, when the GPS is working it looks like the other pictures (the 'not' pictures) except that there are coloured bars above satellites to represent signal strength, or in GPS Status & Toolbox the 'Fix' number is larger (5+ probably).

I just want to make sure we're talking about the exact same thing. It is possible, I think, that there may be more than one underlying GPS problem and I want to check if the behaviour you are seeing is exactly the same as what I am seeing.

I'm going to try the latest update to see how that works out, and will post the result here.

I also spoke to Google support today, and it turns out my device is still under warranty. Their recommendations:

1. Do a factory reset, see if the problem persists (it does - I've tried this already)

2. Reboot into safe mode, set the GPS to 'device only' see if the problem persists

3. If so, let them know and I can take it further

I'll update once I have some more information.
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
[MENTION=3602796]FFU5y[/MENTION], I did my own research for the past months, very similar to yours, and can confirm that behabiour for what we're talking here. I agree that many other people have come here just to report poor GPS signals etc... which have little to do with this one. The drops occur in a very fixed period (in my case every EXACTLY 5 minutes), and the phone needs exactly 30 seconds to recover GPS signal. I've got many logs where you can see these timings, and I also agree there must have to do with aGPS (although you've got gps configured as Device Only).

I've tested many fixes across the last 6 months, with little success, but some stability gain. Yesterday I've upgraded my Nexus 5 to stock Lollipop 5.1.1, which some people have report to have fixed their issue. We'll see.

bye!
[Nexus 5 Q&A, Help & Troubleshooting] FFU5y:
Thanks for the clear response. It is really helpful to know those kind of details because it helps to try to isolate the source of the problem, and differentiate a GPS reception problem (i.e. signal loss due to actually losing sight of satellites because of roof, obstructions, etc.) and a GPS fault.

So you have the problem after exactly 5 minutes each time? And did you mean you have tested it, or use it, in Device Only mode? (I think that is what you meant, but I wasn't sure).

I was testing in Safe Mode and when I was using High Accuracy mode I was certainly still seeing the same behaviour (although of course, being in Safe Mode meant I couldn't actually check the aGPS data of the phone because I couldn't see any other apps). Once I saw the problem in High Accuracy mode, I tried Device Only mode (still in Safe Mode) and didn't have the problem occur, but it was not a long enough drive to be confident that it wasn't just chance. I will do a longer test of Device Only soon.

One thing with Device Only mode is that I believe it still downloads aGPS data for the GPS - it just doesn't use Wifi networks and tower location data to calculate location. Otherwise it should take a whole lot longer for the GPS to re-lock after losing satellite positional data than it does (when everything is working correctly). However, I am happy to be contradicted by someone with more knowledge than me on that.

I will be interested to hear if 5.1.1 makes any difference for you.

Anyway, my summary:

Official 5.1: high accuracy: normal boot mode: problem occurs - satellites all disappear

Official 5.1: device only mode: normal boot mode: untested as of yet

Official 5.1: high accuracy: safe mode: problem occurs - can't check if satellites disappear because can't run 3rd party apps

Official 5.1: device only mode: safe mode: problem not reproduced, but not thoroughly tested

I also haven't tested with flight mode on, although when I start adding that many permutations then comprehensive testing becomes damn near impossible.

As I test more, I'll post additional information.
[Nexus 5 Q&A, Help & Troubleshooting] farahzadfarahzad:
I have your solution guys , if u want to have rock solid gps just buy a qstarz xt808 I am using it for almost two years and I always have battery as BT GPS uses its battery and second it's too easy to connect , I always thought smt is wrong with gmap but after having BT GPS and allow mock location omg it is so different , BT GPS just uses your display and Bluetooth , my qstarz hold battery for almost 24 hours in 1 hrz ,this is my experience after having lots of problems with every phone GPS especially my Sony Xperia and now I can see nexus also has it
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
More info for you. You can find it in Google Code issue, which I asume you've reviewed and voted:

https://code.google.com/p/android/issues/detail?id=81140

You can capture a logcat of you phone while doing yours tests. There you should find messages as this ones:

05-23 18:15:56.789 V/GpsLocationProvider( 787): AGpsStatus is V3: 140
05-23 18:15:56.789 D/GpsLocationProvider( 787): AGPS IP is v6: ::
05-23 18:15:56.789 V/GpsLocationProvider( 787): Passing AGPS IP addr: size 16
05-23 18:15:56.789 V/GpsLocationProvider( 787): Received SUPL IP addr[]: [B@386d6431
05-23 18:15:56.801 D/ConnectivityService( 787): requestNetwork for NetworkRequest [ id=55, legacyType=3, [ Transports: CELLULAR Capabilities: SUPL&NOT_RESTRICTED&TRUSTED&NOT_VPN] ]
05-23 18:15:56.801 D/ConnectivityManager( 787): sending expire msg with seqNum 0 and delay 60000

...followed by some quite similar, but with a failure:

05-23 18:15:57.809 V/GpsLocationProvider( 787): AGpsStatus is V3: 140
05-23 18:15:57.809 D/GpsLocationProvider( 787): AGPS IP is v6: ::
05-23 18:15:57.809 V/GpsLocationProvider( 787): Passing AGPS IP addr: size 16
05-23 18:15:57.809 D/ConnectivityManager( 787): stopUsingNetworkFeature for 0, enableSUPL
[b]05-23 18:15:57.810 E/LocSvc_eng( 787): W/AgpsReleasedState: unrecognized event 3[/b]
05-23 18:15:57.810 D/ConnectivityService( 787): releasing NetworkRequest NetworkRequest [ id=55, legacyType=3, [ Transports: CELLULAR Capabilities: SUPL&NOT_RESTRICTED&TRUSTED&NOT_VPN] ]

This messages don't appear always in my logs, but when they appear, they do every exactly 5 minutes. When they don't appear, there are no gps drops, and when they appear, there may appear or not the bug.

As you can see, there's only 1 second between first and second log message set... This gap may be different. For example, in my case, my APN didn't have "supl" in APN type, and this gap was exactly 30 seconds, and drops lasted those 30 seconds more ore less... Some weeks ago I tested adding "supl" to my APN, and I didn't get rid of the bug, but reduced drop duration to only some seconds (always less than 10)... In fact, now the bug is not so annoying as it was, as many gps apps doesn't show the drop.

More info for you:

- In Device Only it occurs...

- In Flight Mode it doesn't...

- Sorry, but in 5.1.1 it's acting the same... SAME PROBLEM, which is normal, as there's nothing about GPS in changelog.

- If you want to be sure to detect when the bug occurs, install GPS Status & Toolbox. This app has a fuction to appear in notification bar each time an app uses internal GPS, showing you GPS signal strengh and other usefull info. This notification icon doesn't dissapear till you close the app that uses your internal GPS. When the bug appears, this notification icon dissapears from notification bar, and it doesn't appear again when GPS recovers signal. Talked to GPS Status dev, and he told me that it seemed that gps daemon was crashing.

Hope this helps you.

bye!
[Nexus 5 Q&A, Help & Troubleshooting] FFU5y:
Your gibberish is unhelpful, both because it is gibberish and because the content itself is unhelpful.
[Nexus 5 Q&A, Help & Troubleshooting] C3C076:
Getting back to this after some time. Drop outs started to occur again some days after I applied "supl" trick. But I noticed that when I pushed on the back cover where GPS antenna is located, signal came back immediately. So I decided to do a GPS antenna connector mod. Signal strength increased remarkably. Will be testing more during upcoming days.
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
Hope this helps in your case. I also did that trick some days ago... But as always, after some days of stability, problem came back.

As I said in my last post, after all things I've done, I would say that drops are less often, and quite shorter in seconds... but what's for sure is that "core" problem is still there, is software, and is also in 5.1.1.

bye!

PD: BTW, wonderful piece of software GravityBox. :)
[Nexus 5 Q&A, Help & Troubleshooting] HighSpeedSteel:
Nevermind...

Cheers!
[Nexus 5 Q&A, Help & Troubleshooting] C3C076:
Quoting myself. I haven't had a single signal drop while driving this week (waze) so it looks like antenna connector mod did the trick in my case.
[Nexus 5 Q&A, Help & Troubleshooting] HpNoTiQ:
I did it with no results (my rom is Xtrasmooth!) (I think I got less signal drop but there still there!)

Which rom do you use? (5.1 or 5.1.1?)
[Nexus 5 Q&A, Help & Troubleshooting] C3C076:
Stock 5.1.1, stock kernel, xposed + GravityBox.
[Nexus 5 Q&A, Help & Troubleshooting] KodRoute:
Hey guys I've got a problem with the GPS on my Nexus 5. I think it does have to do with the dropping of signal but I'm not sure.

Whenever I'm in the car attempting to use it I can't use it automatically while on the route (+ guided voice), I can just scroll to the next area and continue following the route myself, but that's pretty uncomfortable.

Anyone knows what's going on?
[Nexus 5 Q&A, Help & Troubleshooting] Tantum1:
5.1.1_r4

Just looking at the 5.1.1_r4 change log...and it seems that this build could address the GPS issues...there are at least 10 changes related to GPS

http://www.androidpolice.com/androi...1_r4-to-android-m-preview-AOSP-changelog.html
[Nexus 5 Q&A, Help & Troubleshooting] borgsta:
So fixed in android m?

---------- Post added at 12:55 PM ---------- Previous post was at 12:52 PM ----------

Got an iPhone 6 from work last week so carrying 2 phones around now. Yesterday drove to airport with iPhone on for GPS.

45 minute drive, navigation worked flawlessly and only 10% battery drain.

Today coming home from airport with nexus 5. GPS dropping out every 3 or 4 minutes, missed a few turns cos they didn't exist on my screen due to drops. Battery drained about 25-30%.

Google you have absolutely ruined my mobile phone experience. Shame on them for not even acknowledging the bug too
[Nexus 5 Q&A, Help & Troubleshooting] mihir113:
Did the trick

I tried everything from tightening of screws to getting various apps installed.

This is the only thing that worked for me.

However, if i restart my phone, I start losing the signal so need to go the app do a reset GPS and tadaaaa ! it does the trick.

Thank you anyways,

Mihir
[Nexus 5 Q&A, Help & Troubleshooting] HpNoTiQ:
Hi,

As I said before, i'm a huge user of Waze (average 1000 km a week) and I was pretty embarassed of all the disconection (using Xtrasmooth ROM).

I've done antenna mod with no significant results and yesterday I Wiped all my system and installed stock 5.1.1 . I've got only 1 little disconection in a round about (less than 2sec) today while I drove about 150km.

Will test it more for the next days!
[Nexus 5 Q&A, Help & Troubleshooting] semi-anonymous:
I flashed stock 5.1.1 and still seeing problems. Sure makes for a rotten experience using Waze or playing Ingress.
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
Anyone tried Android M Preview? It's said that it's quite stable for daily use... I can't because I use Sygic, and it's not compatible with M, yet.
[Nexus 5 Q&A, Help & Troubleshooting] MaXi32:
This thread is about GPS dropout while it was working.. Not GPS problem to get locking... The app is designed specially for fixing the GPS lock problem.
[Nexus 5 Q&A, Help & Troubleshooting] MaXi32:
mine is 'default, mms, supl' ... should i remove mms to make it work? maybe this is not related.
[Nexus 5 Q&A, Help & Troubleshooting] dodojanik:
Hi.

I havent read the whole thread but only want add my 5cent.

I own N5 16GB. Under KK GPS was working flawlesly but after the update to Lollipop the GPS signal drop out started. I have returned the phone to the shop where i bought it to fix it. After two weeks it was ready to collect and my claim was accepted. Statement from the shop: Phone was fixed and tested.

Phone had a factory reset, but it was running KK and not L to my surprise so i tought ok.

After update to L and few days later the GPS signal drop out started again so i returnned it again. After two weeks waiting the second claim was again accepted.

Statement from shop: Fault: Swap Board(Main, RF). Work done: Replacement (Component, Module). Parts used: Camera module.

Not sure what has GPS to do with the camera module but to me it looks like it cant be fixed with a software update. Why would they than change the hardware?

I havent tested it yet, but ill come back to report after few days.
[Nexus 5 Q&A, Help & Troubleshooting] LordPando:
you can give it a try...for me it's working flawlessly since that change :)
[Nexus 5 Q&A, Help & Troubleshooting] FFU5y:
I looked over my Logcats, and didn't actually see what you described (which is interesting).

Since my last post, Google has replaced my device with a refurb. Then I did the following:

1. I tested the device for a few days and didn't have any problems. However, it was all on quite short trips so it is possible that I simply wasn't driving long enough.

2. I re-installed CM12.1

3. I experienced the problem (of the satellite list disappearing, etc) again the following day.

Coincidence? Maybe; I didn't have a serious enough test period before installing CM12.1. However, I'm not sure I'd gamble with putting CM12.1 on another replacement nexus if I were to get one. Sure, it seems implausible that CM12 could do anything to the device that wouldn't be undone by reflashing the factory images (and indeed the radio.img flashed by CM is just the LMY48B one), but at this point I just want a phone that actually works and if that means living without some of the nicer CM12 features, so be it.

I am also starting to wonder if when I thought I reproduced it in 'device only mode', I was actually mistaken and it had switched back to High Accuracy mode as a result of me turning navigation off and on or something.

Anyway, now I'm flashing back to stock LMY48B again and hoping that it fixes the problem, while simultaneously being almost convinced it will do no such thing. If it doesn't fix the problem, I'll probably try flashing back to KTU84Q and see if that helps. In either case, I'll probably get in contact with Google support again to try to work through the problem.

Your comment about the GPS Status thing is really interesting, because that is *exactly* what I had observed as well.

This problem is slowly driving me crazy. I almost want to just throw my N5 against a wall and buy another phone so I don't have to deal with it any more.
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
ahahahah! So am I... :)

But I must say that just adding "supl" to my APN config reduces the drops duration from 30 seconds to much less than 10, which is at least "reasonable". Do it right after reinstalling factory image.

In the mean time... let's hope M comes with something for us (I don't expect it anyway).

bye!
[Nexus 5 Q&A, Help & Troubleshooting] FFU5y:
Unfortunately, my APN already has "supl".

Having switched back to stock LP, I continued to have the problem of my location getting 'stuck' when in High Accuracy mode (although not in Device Only mode so far as I have seen). That occurred even when running in safe mode, so it isn't a 3rd party application causing problems.

I have now switched back to KK and from some (pretty limited so far) testing it looks like the problem has vanished (EDIT: Nope, I don't think it has), which is consistent with it being LP related (although it doesn't rule out an underlying hardware problem which is only triggered by LP, of course). Assuming that KK seems to work, I'm going to contact Google again and follow it up with them. I'll possibly also experiment with using LP with the KK radio and see what the outcome of that is.

I would try out M preview, but Keepass2Android doesn't work on it at this stage (or didn't when I last tried it) and that is a dealbreaker for me.

Basically, the short version is that I am want to hound Google until they acknowledge a problem to me, and then take it from there.
[Nexus 5 Q&A, Help & Troubleshooting] PeQuEsan:
I tested 4.4.1 to 4.4.4 radios... No joy... :(

Anything you can think of, I've already tested, almost sure. :)