Develop Bugs

AGPS Patch for Numerous Devices - SGSII is one of them!

http://forum.xda-developers.com/showthread.php?p=21445390
Anyone want to test it out?

Korey_Nicholson said:
Anyone want to test it out?
Click to expand...
Click to collapse
I nominate you!

Korey_Nicholson said:
http://forum.xda-developers.com/showthread.php?p=21445390
Anyone want to test it out?
Click to expand...
Click to collapse
Already testing... I was already getting good GPS results on the EL29 ROM I built (even indoors). This mod is really just another gps.conf edit.
I installed the mod over an hour ago, reset agps data, rebooted and got a pretty quick lock (indoors) immediately. I just tried again and it's not getting a lock at all. I think I'll go back to the original gps.conf and see if it locks properly.
Update: After reverting back to the original gps.conf, clearing agps data, and rebooting, I got a lock in 5-6 seconds. I think part of the issue is that this is now hitting "derekgordon.com" instead of the regular GPS servers. This mod was sent out to the interwebs and I'm sure there are TONS of people installing. I'm not sure if the server is overloaded or whatnot, but I don't want to rely on someone's private website for my Navigation and other GPS needs.
Code:
NTP_SERVER=ntp.derekgordon.com
AGPS=http://derekgordon.com/gps-files/bin/xtra.bin
XTRA_SERVER_1=http://derekgordon.com/gps-files/bin/xtra.bin
-Daryel

daryelv said:
Update: After reverting back to the original gps.conf, clearing agps data, and rebooting, I got a lock in 5-6 seconds. I think part of the issue is that this is now hitting "derekgordon.com" instead of the regular GPS servers. This mod was sent out to the interwebs and I'm sure there are TONS of people installing. I'm not sure if the server is overloaded or whatnot, but I don't want to rely on someone's private website for my Navigation and other GPS needs.
Code:
NTP_SERVER=ntp.derekgordon.com
AGPS=http://derekgordon.com/gps-files/bin/xtra.bin
XTRA_SERVER_1=http://derekgordon.com/gps-files/bin/xtra.bin
-Daryel
Click to expand...
Click to collapse
i already get decent gps as well but this mod has me curious.
i totally agree with you about not wanting to rely on someones personal server.. though only v3+ includes this server. there are older mods that rely on qualcomms servers.

I tried this mod (V3) and it made no difference for me.. I'm afraid my GPS problems are hardware related, I've tried almost every 'fix' available.

Well it probably has to be manipulated to work with our device. The file is for the international sgs2
Sent from my SPH-D710 using xda premium

ker0zene said:
I tried this mod (V3) and it made no difference for me.. I'm afraid my GPS problems are hardware related, I've tried almost every 'fix' available.
Click to expand...
Click to collapse
...i wish u didnt say that...because my gps is fukked...i was hoping this patch would fix it but if i end up being in the same boat as you where its a hardware problem ill just take it into sprint...i havent done it yet partially because i am hopeful that i can fix it too lazy to go and scared they r gunna find out i rooted my phone even tho ill rest it back to stock

I'm getting my hardware replacement this Friday. I've done everything from scripts, to gps drivers, nothing is consistent. Even reverting back to stock didn't do anything.
Hopefully it will fix it.

I tested this today. Before the fix I couldn't get more than 3 satellites in GPS Status, after the fix I got 9.
Also noticed that while navigating I could get a lock in under a minute instead of 5+ minutes before the fix.
Sent from my iPad 2 using Tapatalk HD

Mine is stuck on roaming after flashing, weird
Edit: fixed now, no idea what caused it but fine now
Gps crazy fixed now too

loaded the new config file last night and day later it still won't get a lock. i guess this mod isn't for me.
edit: after few reboots it gets lock in under 5 seconds... hope it stays that way

Anyone know if this patch helps at all on ICS ROMs?
-Sent from my CM9 E4GT using Tapatalk

Is it possible for someone to upload the original gps.conf ?
I lost mine after trying many different modes, to get the damn gps working lol.

Here's my stock gps.conf from /etc/

It may help some but I know that some of the phones have bad gps chips in them. My first one did. I had to get it replaced in order to get a gps lock. The first one I had would never see more than 1 sattelite and never lock. Nothing I did or that the sprint techs did could change it so they swapped it out for me.

Is my GPS broken? (running stock jellybean) - UPDATE see post 6

Ive had my phone for about 2 weeks now, and the GPS is basically unusable. It takes up to 5 mins to get a lock, and sometimes it just never gets one. Even when it does, its not very accurate.
Ive read somewhere that the upgrade to jellybean caused this, and ive been running JN since i owned it, so maybe thats my problem? Anyone else experience this issue? Anyway to test if its just the software?
Id like to figure it out, so if i have to send my phone back i can. Thanks.

I think the Jellybean connection was more coincidental than anything else, since a lot of people were having GPS issues (on both ICS and JB ROMs) around the time that the JB OTA began rolling out.
Try disabling "Google's location service" in the location services setting and see if that helps. If it works, then try reenabling it and try again. That seemed to resolve the issues of most people who were having GPS issues a few weeks ago.

athakur999 said:
I think the Jellybean connection was more coincidental than anything else, since a lot of people were having GPS issues (on both ICS and JB ROMs) around the time that the JB OTA began rolling out.
Try disabling "Google's location service" in the location services setting and see if that helps. If it works, then try reenabling it and try again. That seemed to resolve the issues of most people who were having GPS issues a few weeks ago.
Click to expand...
Click to collapse
With it enabled, i just get the huge circle, and it says my location is somewhere in there. With it disabled, i get "waiting for location", and then "your current location is temporarily unavailable."
Anything else i can try. Like i said before it works, but maybe 1 out of 10 times. Even if it worked half the time it would be useless. If i cant depend on it then its really not worth anything to me.

Try this GPS fix. It worked like a champ for me and many other people.
http://forum.xda-developers.com/showthread.php?t=1789543

azanboy said:
Try this GPS fix. It worked like a champ for me and many other people.
http://forum.xda-developers.com/showthread.php?t=1789543
Click to expand...
Click to collapse
im not rooted.

Ok i just called google play, and asked what i should do. He suggested i do what ive already done (check and uncheck google services, factory reset), both of which had no effect on my GPS. He then told me that a fix should be coming out within the next few weeks, and it should fix it on all devices.
So right now im debating flashing a custom ROM like AOKP or something to see if that fixes it. Im a little worried about doing this to a phone that may be faulty in the first place though. Should i even bother, or should i just wait the few weeks for a fix. If googles OTA fix doesnt fix it back to google it goes.

another update: GPS now works (not sure what made it start), but it still takes forever to lock, and is extremely inaccurate. Usually when you use nav, itll tell you when a turn is coming etc, but the gps thought i was over 100yds behind were i actually was. Even when im in my house, it has no idea where i am, closest it can get in down to 3 houses wide.
Im having flashbacks to my captivate - which didnt work at all - but if a gps only works sometimes and when it does doesnt work very good - then its basically worthless. Am i really going to trust it when i need it?

GPS status from Google play store. Install it and let it download agps data. That should greatly increase accuracy and decrease lock time. You don't need root to use it.
Hope it helps
Sent from my Galaxy Nexus using xda app-developers app

fix
try this download gps test from google play run then it should fix the problem 100% worked for me

[Q] GPS Not Connecting...

I am on my 3rd GS3. The issue I am having is that my Navigation programs (default and telenav) will search and search for satellites, but won't connect. But when I restart my phone, it will work fine for a day or two then back to no connection.
I have spoken to Sprint and this is an unreported problem... until me. So, Sprint will replace my device. I am unrooted and completely stock. I know that Sprint is in Nashville, TN working on installing the 4gLTE towers. It isn't live yet, but they will turn on and off periodically.
I have searched these threads and I have not heard of any others with this issue. My first GS3 was rooted, but I have not done the two replacements. This has only occurred on an unrooted device.
Has anyone heard of this issue and know a resolution? I am considering rooting again to see if that is a fix. This is not a horrible issue, it is much better than a device that won't boot, but any help is greatly appreciated.

Bdozier said:
I am on my 3rd GS3. The issue I am having is that my Navigation programs (default and telenav) will search and search for satellites, but won't connect. But when I restart my phone, it will work fine for a day or two then back to no connection.
I have spoken to Sprint and this is an unreported problem... until me. So, Sprint will replace my device. I am unrooted and completely stock. I know that Sprint is in Nashville, TN working on installing the 4gLTE towers. It isn't live yet, but they will turn on and off periodically.
I have searched these threads and I have not heard of any others with this issue. My first GS3 was rooted, but I have not done the two replacements. This has only occurred on an unrooted device.
Has anyone heard of this issue and know a resolution? I am considering rooting again to see if that is a fix. This is not a horrible issue, it is much better than a device that won't boot, but any help is greatly appreciated.
Click to expand...
Click to collapse
Currently Rooted running the people's rom (3.06) GPS works flawlessly. I have tested and used Scout (By Telenav) Telenav, and Google Maps with no issues at all (tested in FL, MS, And parts of AL during my drive there and back) Haven't had any issues tho.

Mine worked fine while unrooted but started not initializing for startup apps that needed it after i rooted it. I would have to go to the app directly for it to start the GPS. Otherwise the app would continuously look for location. Unfortunately I haven't been able to narrow it down to any one Rom or kernel. Any one else with this issue?
Sent from my SPH-L710 using XDA Premium HD app

I have the same issue but haven't been able to figure out the cause either. Notice it mostly when I set my destination from my house, and wifi connected, then change location after leaving, and phone has kicked over to 3G.
Sent from my SPH-L710 using xda app-developers app

Before I returned my phone for another replacement, I decided to delete all of the apps that I had downloaded. I then rebooted my phone. After 2 days, it worked fine. I then began installing apps one by one. I figured the problem had to be app specific and only apps that use gps. There was one of two apps I decided was the culprit: Facebook or JuiceDefender. I installed Facebook and it worked fine for 2 days. Ample time for the issue to appear. I have figured out that all along JuiceDefender is the problem. It is shutting off GPS like it is supposed to, but not turning it on when it is supposed to. The problem started when I reverted to stock and took the OTA Android update. I am just embarrassed that it took until now to look at the apps as the problem and not the phone. I am going to contact JD and let them know what I have found. I hope there can be a fix, JD really works well... except for my gps!
Anyways, look at apps first as the problem child before running to a repair shop (like I did!) .
Hope this helps others...

Bdozier said:
Before I returned my phone for another replacement, I decided to delete all of the apps that I had downloaded. I then rebooted my phone. After 2 days, it worked fine. I then began installing apps one by one. I figured the problem had to be app specific and only apps that use gps. There was one of two apps I decided was the culprit: Facebook or JuiceDefender. I installed Facebook and it worked fine for 2 days. Ample time for the issue to appear. I have figured out that all along JuiceDefender is the problem. It is shutting off GPS like it is supposed to, but not turning it on when it is supposed to. The problem started when I reverted to stock and took the OTA Android update. I am just embarrassed that it took until now to look at the apps as the problem and not the phone. I am going to contact JD and let them know what I have found. I hope there can be a fix, JD really works well... except for my gps!
Anyways, look at apps first as the problem child before running to a repair shop (like I did!) .
Hope this helps others...
Click to expand...
Click to collapse
JD is designed to disable data connection to conserve battery, You can set it for a threshold where it will keep the connection alive if it's transmitting information back and forth.. (Must have Ultimate for that i believe) So if your disabling the data connection, then it'll kill GPS.

It is set on balanced. That is why I didn't think of juice defender first. Never had this issue until android updated.
Sent from my GT-P5113 using xda app-developers app

I am having the same problem. My GPS will work, but for me, it's only for about 15 mins or so (while in an App that starts it). Then, if I stay in the app, it will just lose connection. If I exit the App, and the GPS turns off, then when I go back it, it will not turn on again. It isn't like it is searching and it doesn't get a signal...it never turns on. The only thing to bring it back is to reboot. I noticed it while on a custom ROM (TPR) and thought it must be that, so I flashed back to stock. Still the same thing. I then tried doing a factory reset. Still not working properly. Anyone have any other ideas?
Thanks in advance.

same here
hotwired34 said:
I am having the same problem. My GPS will work, but for me, it's only for about 15 mins or so (while in an App that starts it). Then, if I stay in the app, it will just lose connection. If I exit the App, and the GPS turns off, then when I go back it, it will not turn on again. It isn't like it is searching and it doesn't get a signal...it never turns on. The only thing to bring it back is to reboot. I noticed it while on a custom ROM (TPR) and thought it must be that, so I flashed back to stock. Still the same thing. I then tried doing a factory reset. Still not working properly. Anyone have any other ideas?
Thanks in advance.
Click to expand...
Click to collapse
I took it in to Sprint they said it was the bad antenna and will give me a refurbish phone. This phone is less than a month old and why I will take a refurbish phone. Like I bought a brand new car and come in for a fix and they took me to the use car lot for a factory certificated car.
So I sent to Samsung and they claimed replacing a part and got the phone back, same problem is still happening.
Anyone can help us on this. It seems a common issue to a few of us.

Here is a simple GPS fix that works well.
http://forum.xda-developers.com/showthread.php?t=2201668

GPS locking up

I was just wondering if anybody has been having this issue. After successfully locking onto satellites for GPS for navigation, if I turn off maps when I reach my destination, it requires a reboot until I can use GPS again, it only updates once every few minutes. Haven't done much testing on it since I was on a highway going 80 when I noticed
Sent from my Nexus 7 using Tapatalk HD

Flippy125 said:
I was just wondering if anybody has been having this issue. After successfully locking onto satellites for GPS for navigation, if I turn off maps when I reach my destination, it requires a reboot until I can use GPS again, it only updates once every few minutes. Haven't done much testing on it since I was on a highway going 80 when I noticed
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
Same issue here. I think its wide spread but only a few of us use the GPS function
Sent from my Nexus 7 using xda app-developers app

yup
Happened when i pushed the second update (twice). I'm hoping for a fix soon.

Same here!

Same here... even exchanged for a new device from 16 to 32gb model and still the same issue. Works for about 10-30mins then locks me in the location completely.
Moderator should merge threads.... issue is duped on XDA

Happened to me while playing ingress, I had to reboot
Sent from my Nexus 7 using Tapatalk 4 Beta

This seems to be a legitimate issue. Has anyone reported the bug to Google?

Vanhoud said:
Happened to me while playing ingress, I had to reboot
Sent from my Nexus 7 using Tapatalk 4 Beta
Click to expand...
Click to collapse
HERES THE FIX!!
I had this very same issue, and found a resolution for it (can't remember the source now)
After taking both system updates and rebooting, it is necessary to hard reset the device. Upon the initial boot, you must leave all options checked but the following -
Backup and Restore options (you can turn on after the initial setup is finished from options)
there are three location options, one being new to 4.3 and what I believe to cause this - it mentions the ability for location to be grabbed when the screen is off. You must diable this option.
Finish installation, and then you will have properly working GPS.
Here's how I'm quantifying that - before when I was in the exact same boat as those in this thread, I would open GPS test, and I could see 7 or 8 sats in view, but it wouldn't lock. Or if it did, it would work for a short period of time, and then bomb out. I drove around the city for a few hours yesterday using the GPS so we're near and dear now to each other.
After doing all this - you will IMMEDIATELY see 20 sats available upon launching gps test and then almost immediately get full lock and keep it that way.
Was a pain that I had to clear everything, but now GPS is working as I would expect it, and I've not had any issues getting full lock, even in my basement.
Hope this helps!!

I tried to duplicate the problem you describe, but was not able to.
Here is what I did:
- Launch Maps application for the first time.
- Accepted the terms of service and enabled location services access, including Wi-Fi.
- Got location via Wi-Fi, then pinpointed the location via GPS.
- Back to home screen -> Settings -> Apps.
- Maps was not running, but I went into Maps under the all apps view and force closed it.
- Back to home screen.
- Launch the Maps application again and I had an accurate location via GPS in less than 10 seconds.
I repeated this procedure again with the same results. I then disabled Wi-Fi location assistance so that only GPS was available. Repeating the tests twice again and I still see the same results. I have no problems getting a good location lock quickly.
I am running the stock firmware, build JSS15J, and Maps v7.0.1.
I am happy to test again if somebody having this problem can provide specific information regarding their test procedures and results.

mrc13an said:
I tried to duplicate the problem you describe, but was not able to.
Here is what I did:
- Launch Maps application for the first time.
- Accepted the terms of service and enabled location services access, including Wi-Fi.
- Got location via Wi-Fi, then pinpointed the location via GPS.
- Back to home screen -> Settings -> Apps.
- Maps was not running, but I went into Maps under the all apps view and force closed it.
- Back to home screen.
- Launch the Maps application again and I had an accurate location via GPS in less than 10 seconds.
I repeated this procedure again with the same results. I then disabled Wi-Fi location assistance so that only GPS was available. Repeating the tests twice again and I still see the same results. I have no problems getting a good location lock quickly.
I am running the stock firmware, build JSS15J, and Maps v7.0.1.
I am happy to test again if somebody having this problem can provide specific information regarding their test procedures and results.
Click to expand...
Click to collapse
It was showing an accurate location in Maps until I started to drive. Once I sped up, it showed me where I was ~15 miles back
Sent from my Nexus 4 using Tapatalk 2

kmartburrito said:
HERES THE FIX!!
I had this very same issue, and found a resolution for it (can't remember the source now)
After taking both system updates and rebooting, it is necessary to hard reset the device. Upon the initial boot, you must leave all options checked but the following -
Backup and Restore options (you can turn on after the initial setup is finished from options)
there are three location options, one being new to 4.3 and what I believe to cause this - it mentions the ability for location to be grabbed when the screen is off. You must diable this option.
Finish installation, and then you will have properly working GPS.
Here's how I'm quantifying that - before when I was in the exact same boat as those in this thread, I would open GPS test, and I could see 7 or 8 sats in view, but it wouldn't lock. Or if it did, it would work for a short period of time, and then bomb out. I drove around the city for a few hours yesterday using the GPS so we're near and dear now to each other.
After doing all this - you will IMMEDIATELY see 20 sats available upon launching gps test and then almost immediately get full lock and keep it that way.
Was a pain that I had to clear everything, but now GPS is working as I would expect it, and I've not had any issues getting full lock, even in my basement.
Hope this helps!!
Click to expand...
Click to collapse
Thanks, I'll try this when I get back to a decent data connection
Sent from my Nexus 4 using Tapatalk 2

I was the source #1, AND #2 although I thought this fixed it, the issue came back! Its like a memory error with the gps driver and or buffer with a overstack flow of data and it either crashes it so you loose gps functions, or locks it up so its searching but never locks. Seems as if its software and android 4.3 or google system service or framework issues. Same problem with older S4 chipsets and jellybean. Google fixed that by updating system files for jelly bean 4.1.2 and 4.2.x. Also the new maps could be the culprit as well since it was updated to a completely new version.
kmartburrito said:
HERES THE FIX!!
I had this very same issue, and found a resolution for it (can't remember the source now)
After taking both system updates and rebooting, it is necessary to hard reset the device. Upon the initial boot, you must leave all options checked but the following -
Backup and Restore options (you can turn on after the initial setup is finished from options)
there are three location options, one being new to 4.3 and what I believe to cause this - it mentions the ability for location to be grabbed when the screen is off. You must diable this option.
Finish installation, and then you will have properly working GPS.
Here's how I'm quantifying that - before when I was in the exact same boat as those in this thread, I would open GPS test, and I could see 7 or 8 sats in view, but it wouldn't lock. Or if it did, it would work for a short period of time, and then bomb out. I drove around the city for a few hours yesterday using the GPS so we're near and dear now to each other.
After doing all this - you will IMMEDIATELY see 20 sats available upon launching gps test and then almost immediately get full lock and keep it that way.
Was a pain that I had to clear everything, but now GPS is working as I would expect it, and I've not had any issues getting full lock, even in my basement.
Hope this helps!!
Click to expand...
Click to collapse

kmartburrito said:
I had this very same issue, and found a resolution for it (can't remember the source now)
After taking both system updates and rebooting, it is necessary to hard reset the device. Upon the initial boot, you must leave all options checked but the following -
Backup and Restore options (you can turn on after the initial setup is finished from options)
there are three location options, one being new to 4.3 and what I believe to cause this - it mentions the ability for location to be grabbed when the screen is off. You must diable this option.
Click to expand...
Click to collapse
I had done a hard reset as well after applying the initial updates. I left backup enabled but disabled restore during the setup process and disabled all three location features as well.

skyhawk21 said:
I was the source #1, AND #2 although I thought this fixed it, the issue came back! Its like a memory error with the gps driver and or buffer with a overstack flow of data and it either crashes it so you loose gps functions, or locks it up so its searching but never locks. Seems as if its software and android 4.3 or google system service or framework issues. Same problem with older S4 chipsets and jellybean. Google fixed that by updating system files for jelly bean 4.1.2 and 4.2.x. Also the new maps could be the culprit as well since it was updated to a completely new version.
Click to expand...
Click to collapse
Yes you were, I remember your username now. Thanks skyhawk21! You resolved this for me. I used my N7 for a few hours in the car yesterday, and it was spotty and crappy in clear weather for a while, I did a reset in the car like you mentioned, and everything now has been working solidly since. Thanks again.
The last part is sad to hear. I however have used it for several hours straight with no issues, so I'm hoping it stays strong.

I am confused, so should I reset mm y tablet? Will that actually fix GPS?
Sent from my Nexus 7 using xda app-developers app

It will fix it for awhile but the issues creeps back up.... good luck this new nexus 7 is turning to be into a nightmare, flaky gps and flaky touch screen issues on two fo them now!

As long as you only use google maps it seems to work ok.
Once you start using other GPS apps (GPS Test, Gas Buddy, Google Earth) the problem shows up eventually.
It might have to do with multiple apps accessing GPS, but that is just a guess.
I wouldn't bother factory resetting (for the N7 2013 GPS issue). Reboot has always allowed the unit to get locks again (for me) It feels like an OS or driver problem.

I found a posting on AndroidCentral about the same issue. According to one of the posters, the issue is known by Google and an OTA should be pushed out soon for it. I just hope its true because I'm pretty dependant on my N7 for finding my way around town
http://forums.androidcentral.com/google-nexus-7-tablet-2013/300566-gps-problems-nexus-7-2013-a.html
Sent from my Nexus 4 using Tapatalk 2

I must be lucky, I've used it for several more hours, and still rock solid GPS at all times.

hmmmmm gps wasn't locking earlier then decided to do a soft reset, now it's working. I just have to try it later when i drive home and see what's up.

[Q] GPS will not lock on - tried different roms and stock,

Hi all, pretty much at the end of the line trying to fix this.
I bought the phone at the end of November, and immediately rooted it, S-OFF etc. The first ROM I tried was Android Revolution HD, and everything worked fine, except for the GPS. It enables, and using an app like GPS Test says I can see 27 satellites or whatever depending where I am. However, it just won't get a fix and lock on. Using Google Maps, it just says 'waiting for location', but never locks on.
So, I recently tried the ViperRom (android 4.4.4), but same issue.
So, I thought I'd put everything back to stock. I followed this guide: http://forum.xda-developers.com/showthread.php?t=2735235, and all the flags in the bootloader look as they should. Stock ROM also.
Still no luck.
So I tried converting it to a Google Play Edition running Lollipop 5.01, using this thread and the links graffixnyc provided.
Again, everything works, but the same GPS problem.
Does anyone have any suggestions..? I can't think of anything else to do
Thanks for any help!

Following this I've tried some different radio versions to see if it makes a difference, and on some I don't pick up any satellites at all. Something to note is that GPS Test picks up satellites inside as well, which makes me think it's not actually picking anything up...
In no cases can I get a fix

If you tryed all of that... you would think its probably a hardware issue

That is what I'm thinking now, just wondering if anyone had a magic solution I hadn't thought of! Really like the phone otherwise