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gps testing, puzzling results

i went on a few drives today to test out my gps, the odd thing is i couldnt get it to misbehave in a significant way. i am using eugenes ginger clone and da_g's update.zip using his own jupiter.xml. i chose his control plane version. i also used some files from jj4 not because i thought they were better but because i was experimenting with the jm9 "FIX" files but wanted to revert back and grabbed the wrong ones from my computer.
my lbs test settings were:
Sesssion Type: tracking
Test Mode: s/w Test
Operation mode: Standalone
Start mode: Hot start
GPS Plus: OFF
Dynamic accuracy: OFF
accuracy: 50
Logging: OFF
supl settings:
server: supl.google.com
port: 7276
secure socket: off
agps mode: control plane
"use wireless networks" in setting>location and security, was not selected
i ran several my tracks trying to recreate the situation described by Da_g where the gps position jumps around and locks are lost when mytracks is in the foreground and lbs in the background but is accurate in the opposite situation. i wanted to see if any "fix" would help this situation, be it a modem file or gps library from other rom but could not create the unstable situation observed by others. this bugged me because i have had serious trouble with google maps acting erratically while all my stationary tests come out fine. the problem is i never used the gps on this rom and did not know if it suffers from this problem in the first place.
it appears this rom does not have that particular problem or the problem is not predictable or can not be caused at will.
i ran a few my tracks with jm9 files. the results were mediocre at best, did it help? nope
did it hurt? maybe, not sure but probably not.
then i ran the test with jj4 files. did it help? maybe but probably not, tests did appear slightly better but were not free of imperfections
did it hurt? nope
on each test i ran one my tracks with mytracks in the forground and lbs in the background then another with lbs in the foreground and my tracks in the background.
observation: phone did not lose gps signal upon starting any app or switching to any app like others reported. tracking results were too close to call. i used similar routes with clear skys and the accuracy was similar when compared on the same road. with lbs up front i could watch the reported accuracy, it mostly jumped from 10 to 30m occasionally hitting 5, and spending more time at 10. average was about 15meter accuracy.
then for s's and g's i ran my tracks behind maps navigation to see if navigation would aggravate the bad behavior. well it didn't. perfect results! this is both reassuring and disapointing. while i can be a little more confident in my gps which in the past has been good except when using google navigation it also make me wonder if maybe the gps is just plain unstable and cant be predicted.
did samsung get it right in the base rom that eugene worked from? did using control plane fix it? did i just get lucky today with different results tomorrow? does touchwiz somehow cause the problems(not likely but who knows)? eugene did a pretty good job of removing touchwiz from samsung sources, not true aosp but it would fool most.
did i stumble on a unique combination thus fixing my gps? im sure the answer is no. it is either in the control plane settings with da_g's mods or in the rom itself.
the jl3 modem seems to get a slightly better signal but is certainly not a "fix"
will you have similar results? dont know, try it. but be warned that the rom is giving me some funny battery reporting and the standard recalibration isnt really working. i also had some random shutdowns when i used juice defender(maybe a bad install on the app) it also is not likely to work with samsung widgets and the video player wont play those weird media hub files.
i do believe that axura was built off the same base rom (im really not sure about this, just a hunch) but i had no luck with gps on that rom, i didnt use axura long enough to try fixing it but others report it as being very good.
i wonder if anyone has looked into available ram as a cause? eugenes rom seems to have a small memory footprint and i often have over 200mb free! could minfree be killing a service when ram runs low? could a setting in other roms be killing a service when exiting some gps apps for the sake of ram/battery usage?
im not a dev and would have no idea where to start on this. i also know that much files that control gps are proprietary and cant be fixed by the community, we can only hope to identify the problem and employ a workaround to prevent problematic situations assuming that the proprietary files are infact more or less functional. will samsung employ a fix? well i think with the number of identified problems with the gps that the galaxy s was released prematurely. samsung likely rushed the release to get a bunch of ooohs and ahhhhs without doing enough testing. it appears that they are incrementally improving gps performance over several builds and it may continue to get better, maybe over several updates. untill then ill use eugenes rom. i also think that if froyo builds did not help you then you may have an antenna issue!
ill attach the my tracks file when i have time.
i would like to thank clshortfuse and especially Da_G for there efforts. Da_G i hope you find a solution that we can all use regardless of rom, or maybe you can cook up a rom yourself, people would definately use it..

Odd GPS issues

OK, so I've dug around the forums and have yet to really find anyone who had a similar issue and wasn't able to fix it with either FasterFix or GPSStatus so thought I'd start a new thread. If anyone knows this answer and knows it's in another thread then let me know and I'll shut this one down...
Anyways, the issue in a nutshell is that Maps refuses to work without "Wireless Networks" being checked (it throws up an error that tells me to turn on My Locations or to turn on either "Wireless Networks" or "GPS satellites" even though GPS sats is checked in the settings) and even then the accuracy is horrible (on tower-based, which is more or less to be expected since it's a triangulation, I believe), Navigation/Locations will both get a location but it appears to be "Wireless Network" based, GPSStatus shows a max of only 3/3 sats even outside on a clear day but no other app sees those even those 3 sats. I basically think my GPS chip is locked up. (Is that even possible?)
The GPS issues started one night on CoreDroid's V5.0 after working for quite some time on CD's various builds, including working on 5.0, so I flashed up to 5.1 and still no-go. Wiped everything, reflashed 5.1 and still nothing. Moved over to RCMixHD 5.9 and it still acts up. It used to be that I could uncheck "Wireless Networks" and it would just bounce off of the GPS sats but now nothing seems to see the chip. I've wiped everything, reflashed numerous times, flashed a new radio (the latest Mar leaked GB radio), gone inside, outside, around the house, around the town, etc etc etc, cleared the Maps cache, uninstalled/reinstalled Maps, reinstalled Locations several times, reset the GPS state with GPS Status, redownloaded the GPS data w/ GPS Status, changed out the gps.spade.so file in CoreDroid 5.0/1 with one from the Inspire Dev Forum (I think, may have been General) that modded files based off of FasterFix files that were supposed to fix the GPS if FasterFix doesnt (the files worked for a whole one test...then everything quit working right again) and I've reset the NTP to North America's server via FasterFix and STILL nothing. I'm getting rather frustrated at this point and any help would be appreciated. Thanks guys!

How about flashing back to stock Rom?
Sent from my calculator

What would the advantage be? I mean I've already flashed different ROMs and gotten the same issue so part of me doesn't care to flash another couple of times but another part of me wonders why it'd help any since it's just going to be overwritten when I flash back to RC or any other custom. Will flashing to stock somehow reset the GPS. I know flashing to stock is generally one of the first suggestions but I've always wondered how it actually helps. Guess I'm off to hunt down the stock on my computer while I wonder lol...thanks

Did you use RUU to get back to stock Rom and radio? RUU does more than just flash the Rom. It flashes the radio to stock. Only reason I'm saying this is cause someone else had Gps issues and when they went to stock unrooted, everything worked as it should.
Sent from my calculator

Do a forum search for inspire RUU. Should come up.
Sent from my calculator

Awesome, thanks. I was unaware that the Inspire had an RUU. Well, most RUU's I've run across have been packaged into a program like ODIN but I think I can do the RUU manually via ADB. Hopefully they have a program out, though. Think all my stock stuff has been done via ADB and the Hack Kit so I'll dig around for an all-in-one program. Thanks!

Sadness...no such luck even on RUU stock.

Just curious, what method did you use to do this?
Is this the same one you used?
http://www.filefactory.com/file/b50...60.19_26.06.04.06_M_release_166557_signed.exe
Sent from my calculator

I have been having similar GPS issues on my stock Inspire. After a long HTC customer service call, I was advised to do a factory reset on the phone. Voila, the problem appears to be solved. I now get 8 or 9 satellites and lock in about 30 seconds. Also, after this reset, my battery life is much better. So, I am not sure what bug I eliminated in the factory reset, but I accomplished something. What would affect both battery and GPS? I know this is not the same as for a rooted phone, but perhaps there is some connection. By the way, just what SNR do users with solid GPS performance get on GPS Test? I never get SNR over 25 on any satellite, whether indoors or out...

HtcOmega,
I helped another person with an inspire, so maybe it might work for you too, Try the link in my sig and see if replacing the gps.conf with one of mine may help you. It has been very successful so far, it might help with your dilema as well. And if your going to ask whats different about mine then fasterfix app, the answer is alot.
Let me know.

AngelDeath said:
HtcOmega,
I helped another person with an inspire, so maybe it might work for you too, Try the link in my sig and see if replacing the gps.conf with one of mine may help you. It has been very successful so far, it might help with your dilema as well. And if your going to ask whats different about mine then fasterfix app, the answer is alot.
Let me know.
Click to expand...
Click to collapse
I was having the same issue as HtcOmega and decided check out your link. I must say that my GPS is working as it should now. Takes at most 30 seconds for a lock without the case on. I flashed the north america zip instead of choosing the north east version. Is there any reason why you wanted people to choose their specific region?

Primarily the reason is I broke up the USA into 6 regions and made a script for 62+ individual countries because I am not using the generic ntp servers from the pool, these are ntp servers specifically for that location, and by narrowing down the location and not using a general ntp it should make lock times faster. If you read the thread for the most part quick reading you will see that the NA script is made primarily for people who travel to many places frequently and do not want to keep changing scripts, as well as people in the common wealth countries would use the NA script.
I am currently testing out 1.2 with a handful of beta testers to see if the new script can be a little more consistent, there are new commands in the new script, which is phase one at least for the HD2 since the HD2 is a prt and lacks the support for true agps.

[GT-I9003] [FIX] Samsung Galaxy SL Easy GPS Fix

This small guide is an instant GPS Fix tried on Samsung Galaxy SL I9003 and may work on other phones. This small guide will reduce the time taken to lock to satellites and has been tested inside a building with 8 floors and I was able to achieve lock to 4 satellites.
A much better guide to GPS Fix is here : http://forum.xda-developers.com/showpost.php?p=13133654&postcount=142
Since that guide requires a little bit of manual work, so this is just a small software tweak
So here is what you have to do:
1. Turn Off GPS
2. Open LibTestMode. If you do not know how to open it then you can open it by typing the following code in the dialer (Froyo Only): *#*#3214789650#*#*
3. Under "Application settings" Change "Operation Mode" to Standalone. (Some people have reported better accuracy with MS Mode)
4. Under "Application Settings", Change "Timeout(s)" to 100
5. Under "SUPL/CP Settings" Change the SERVER & PORT to supl.google.com and port 7276
6. Reboot
NOTE: The attached screenshot is inside the building. I have received better results outside and accuracy of upto <40 feet was achieved.

Cold Start- GPS.
Hi there,
My Samsung Galaxy Pro was a bit reluctant in locking on to satellite signals, it used to take no minimum than 5 minutes.
Then I chanced upon an app in the market: "GPS Aids"... Do check it
Just wanted to know your views on "GPS Aids" & such alike apps...
Im now getting GPS lock in less than 5secs with 9-10sats in view & 7 in use inside my 3storey building surrounded my such more buildings and tall trees.
The best accuracy rate I have achieved is 2metres & most of the time it is 4metres
Thanx,
S.K.Pingua,
New Delhi.

Gps aids? does it really work so well? let me try it

Yes GPS AIDS V2 is a great software. I am getting GPS lock within 3-10 seconds on XXKB3 FW.

i'll try it and then post about thanks for the advice!

Gps aids works really well indeed, i get a lock within seconds, thanks a lot mate

Gprs
can any1 provide free gprs/3g for airtel??

is all i9003 need this fix ? cause in my device gps is OK .

awazil said:
is all i9003 need this fix ? cause in my device gps is OK .
Click to expand...
Click to collapse
Its an application, not a fix. You should try once. Its amazing...

GPS FIX i9003
I purchased my i9003 a fortnight back and had wonderful opinion , till the time i checked the GPS and surprisingly it did not work, could not understand how a product can be defective out of box. however when i googled for a fix , came to know there was significant issues with galaxy S phones
Contacted Samsung customer care , the technical folks have no clues and seems to from a different planet,all of them either denied there was a problem or asked me to do a hard reset, one tried to convince me for an hour that A-GPS worked only on network triangulation and did not have a actual gps and will give only an approximate location.
coming back to the problem , The earlier issues in Galaxy s related to configuration which were rectified by a fix and 2.2 update
the problem with i9003 i feel had something to do with the inbuilt sensor, i tried lot of software from android market including GPS Doctor, GPS Aids, GPS Fix, GPS Status, GPS test and GPS essentials among others... none of them were able to fix the problem , although few of them were able to detect gps satellites ( sometime even 12) but were not able to get a fix. the sad part was two of the apps were paid apps and total waste of money
In my trial and error approach I tried a software called Turbo GPS (its free) from android market, the major difference in this software vs. others was it had its own software to manage the sensors and after installing software the problem vanished. all you need to do is to run Turbo GPS wait for a couple of minutes and then start google maps. it worked like a charm.....

adgdeepak said:
I purchased my i9003 a fortnight back and had wonderful opinion , till the time i checked the GPS and surprisingly it did not work, could not understand how a product can be defective out of box. however when i googled for a fix , came to know there was significant issues with galaxy S phones
Contacted Samsung customer care , the technical folks have no clues and seems to from a different planet,all of them either denied there was a problem or asked me to do a hard reset, one tried to convince me for an hour that A-GPS worked only on network triangulation and did not have a actual gps and will give only an approximate location.
coming back to the problem , The earlier issues in Galaxy s related to configuration which were rectified by a fix and 2.2 update
the problem with i9003 i feel had something to do with the inbuilt sensor, i tried lot of software from android market including GPS Doctor, GPS Aids, GPS Fix, GPS Status, GPS test and GPS essentials among others... none of them were able to fix the problem , although few of them were able to detect gps satellites ( sometime even 12) but were not able to get a fix. the sad part was two of the apps were paid apps and total waste of money
In my trial and error approach I tried a software called Turbo GPS (its free) from android market, the major difference in this software vs. others was it had its own software to manage the sensors and after installing software the problem vanished. all you need to do is to run Turbo GPS wait for a couple of minutes and then start google maps. it worked like a charm.....
Click to expand...
Click to collapse
Hi adgdeepak, tough but successful experience. everyone has a share of GPS challenges, nice to know yours.
I crosschecked & double checked but could not find "Turbo GPS" on Android market!
Anyway, happy navigation

Not to take anything away from the OP author or anyone else, but would anyone be willing to test mine out? It is in my sig. If it helps you great, but its more for me to see if my theory is right that any android phone will work.
So far, it works on the Droid, Captivate, Aria, Inspire, Desire +HD, HD2, and the list goes on. I will not be checking this thread But its another alternative I wanted to point out, and am curious of its success.

'good old fix' for captivate or vibrant strikes again...same with 'press antena' one, nothing new...
again users have to fix their phones by editing service menu and with a piece of paper/coper =)
as it is PROBABLY the same BCM4751 chip - with same crappy board-antena contact as in sgs - you SL users are GPS handicapped ;]
could someone check what chip it carries?
//edit regarding hardware fix -> http://forum.xda-developers.com/showthread.php?t=878970
dont forget to say thank you samsung ;]

$omator said:
'good old fix' for captivate or vibrant strikes again...same with 'press antena' one, nothing new...
again users have to fix their phones by editing service menu and with a piece of paper/coper =)
as it is PROBABLY the same BCM4751 chip - with same crappy board-antena contact as in sgs - you SL users are GPS handicapped ;]
could someone check what chip it carries?
//edit regarding hardware fix -> http://forum.xda-developers.com/showthread.php?t=878970
dont forget to say thank you samsung ;]
Click to expand...
Click to collapse
No buddy, we do not have problem with GPS. Locks within 5 seconds with XXKB3 firmware.
I saw you your post on [ROM][ODEX] SATAN.XXJVO beta1. Would you like to help us in porting few goodies from I9000 or can you guide us whom to contact for porting clockwork recovery for I9003. Thanks in advance.

i also have instant fix, that never was an issue
real problem is with recorded tracks (eg mytracks) - while i am not moving fixed position likes to travel around, and wile moving it likes to record me off position
what bothers me is also fix stepping - every 5m not by 1m ad in my 5 years phone
as for CWM ask Chainfire

$omator said:
i also have instant fix, that never was an issue
real problem is with recorded tracks (eg mytracks) - while i am not moving fixed position likes to travel around, and wile moving it likes to record me off position
what bothers me is also fix stepping - every 5m not by 1m ad in my 5 years phone
as for CWM ask Chainfire
Click to expand...
Click to collapse
Thanks for replying. I have never tried to record tracks while navigating. Will test it and post the results here. I have sent PM to chinfire, hoping for positive response towards the custom/CWR for I9003

GPS Aids helps but not that much.. I couldn't find the 'Turbo GPS' either! Any links or directions to that app?/

rxpaul said:
GPS Aids helps but not that much.. I couldn't find the 'Turbo GPS' either! Any links or directions to that app?/
Click to expand...
Click to collapse
It is probably not available to your country yet, by google market..Just use market enabler or market unlocker and you will find it..
http://www.appbrain.com/search?q=Turbo+GPS

KonfusedGeek said:
This small guide is an instant GPS Fix tried on Samsung Galaxy SL I9003 and may work on other phones. This small guide will reduce the time taken to lock to satellites and has been tested inside a building with 8 floors and I was able to achieve lock to 4 satellites.
A much better guide to GPS Fix is here : http://forum.xda-developers.com/showpost.php?p=13133654&postcount=142
Since that guide requires a little bit of manual work, so this is just a small software tweak
So here is what you have to do:
1. Turn Off GPS
2. Open LibTestMode. If you do not know how to open it then you can open it by typing the following code in the dialer (Froyo Only): *#*#3214789650#*#*
3. Under "Application settings" Change "Operation Mode" to Standalone. (Some people have reported better accuracy with MS Mode)
4. Under "Application Settings", Change "Timeout(s)" to 100
5. Under "SUPL/CP Settings" Change the SERVER & PORT to supl.google.com and port 7276
6. Reboot
NOTE: The attached screenshot is inside the building. I have received better results outside and accuracy of upto <40 feet was achieved.
Click to expand...
Click to collapse
No such luck.
My setting were already set to the above. Not a single GPS lock.
Firmware version 2.2.1
Baseband version I9003DDKA5

Got it to work. This is specific to me.
background:
Samsung i9003 from India.
Provider: AT&T, Airtel
Current Location: California
Here what I needed to do.
1. Root your phone
2. Down GPS Aids from the Marketplace
3. Use the forced LTO method from the setup wizard of GPS Aids. (this requires your phone to be rooted. Native method does not work for me.)
4. run LibTestMode and change the Application Settings -> Operation Mode -> MS Mode (Standalone did not work for me)
5. Reboot
Looking for to use this when I go back to Bangalore again.

GPS fix - ICS General

Ive perused several different phone threads and many ics threads regarding the gps bug (even some official nexus gps people are having probs).
Whether this works for all phones Idk. I have the gs2 Touch.
On fc07.
I didnt want to go thru going back to gb.
Tried several gps apps.
http://www.appbrain.com/app/gps-doctor/com.epekware.gpsdoctor
This one did the trick. (not affiliated with them in anyway) I know sounds like spam but Im just happy to find a quick fix.
Gps still says searching but Im getting exact locations on maps and 'places'. Facebook is now showing me places nearby BUT still giving me a not found message. Previously fb would not show me any places in 'check in' and then also give me the not found message.
This is by far the easiest fix Ive come across in the many threads. doctor appears to erase all gps data and then downloads whatever and 'injects' it. You guys likely will know better than I.
Some screens attached. There is 'auto' and 'manual' I did the auto twice. Im attaching the manual screens for those that know what the hell all that is.
peace hope this helps.
(just tried again - turned off gps - back on. Opened maps and the arrow was way off. clicked the little circle button to 'find me' and it said 'locating' then bam snapped to my exact location)

Did this work for anyone else??
I tried it again and didnt have such exact results without wifi. So idk.

This gave me magical results...
Hey there!
Try GpsFix Deluxe, by Android Labs. It costs some $$$ but it hasn't failed me yet. I had an array of problems with fixing my GPS for long journeys, but alas, no more!
I give it the highest of recommendations.

it work for italy too?

I eventually get a gps signal... it takes a lot longer than stock rom... I hope there is more support for that soon

Moved to fc28 and Im all good.
The gps fix I used above never worked Im sorry to say. It seemed like it did. I guess it worked 'better' but didnt really work.
Gps would still be off by a block or so.
With the latest ics its off by feet. And it says 'lock' or w e it says to indicate lock.
woops fc24 not 28.

GPS not working well

Anybody seem to be having problems with their XZ Premium GPS not working as they should be? Mine is intermittent, sometimes when it works, it works well. But the moment I took a wrong turn and quickly fired up my Google Map navigator, it have problems detecting where I'm at. The Map will show the route, but my location is all over the place. It would pause and stay in that spot for a while, then move me on a lake or off road. I tried "GPS status" app to pin point where I'm at. It doesn't always want to work.
It's getting really annoying, I want it to be reliable when I need it. Lucky I still have my Z3 as backup. So far, seems like the Z3 is the best Sony ever made.

Same problem here...It is hard to start GPS....it shows current position, it lose it. I have to fight for 10 minutes until its stable.

the same issue here. OK after reboot, but problem is back again a after

I had that problem once while downtown... the buildings in that area are all old and packed pretty closely together. It just did not want to update for the life of me. Rebooting it did not seem to help it at all. Especially using the walking directions... forget it. I didn't have time to fuss with a gps app to see if I just wasn't getting any sat connections, but if it happens again I will.

Wow, so it's a known common problem. I hope it's software related so it can be fix by updates. Now I have to open two programs to make sure it always working all the time. Run "GPS Status" app and then open Google Map. Cumbersome.

Dial *#*#7378423#*#*, service test, GPS, Purge Assistance Data
This worked for me!

My use of Purge Assistance Data seemed to help, but I've had a couple of episodes of the problem since then where it didn't help. However, in the past three days the problem has not appeared. I cannot determine what has changed; many apps have updated as usual, and in order to try to determine if this is a hardware problem I ran phone in Safe mode during which problem did not appear. Interestingly (or not) the problem has not occurred during subsequently use of the phone in normal mode. BTW, I'm running the July 1st security update (45.0.A.7.90); the August 1st version has not been offered to me yet by the Software Update).

CyNoob said:
Dial *#*#7378423#*#*, service test, GPS, Purge Assistance Data
This worked for me!
Click to expand...
Click to collapse
Very nice. Seem to be working very well. Although I have not put it to full use yet since I'm working at home today. Let's see how it run when I go to work in the office tomorrow.

This won't help? - - https://forum.xda-developers.com/showthread.php?p=73337848

My XZ premium is 4 weeks old and had problems with the GPS since day one. The GPS was very unreliable taking me in the wrong direction and sometimes delays in giving instructions until after passing my turns. Using google Maps and high accuracy settings. Contacted Sony today and they have asked me to contact google first to make sure there is no software issues from their side before they can look at it. Meanwhile I will download a different navigation app and see if the same problem happens.
I did GPS location test but it seems everytime I attempt it the phone seems to take forever in finding anything so I give up normally after 10 mins.
If any one has found a solution to this problem please let me know (other than changing the phone of course)

My GPS problems went away with 45.0.A.7.120

You're not alone!! I always end up going wrong directions. Compass is very way off.
Sent from my G8142 using XDA-Developers Legacy app

+1 here. it's really frustrating as i use my GPS a lot.

I have the same issue. Second time I sent my phone to Sony. I will update the forum.

Was having this issue as well. Purned GPS Assistance data seemed to help. also did the battery trick. maybe sony should give us an update that will not allow gps to "turn off" when using apps that require it.
i searched on my phone some where on the hidden settings. The Destination was 30mins and about 20miles or so. Said the gps was only on for around 10. Cellular data was used too. This has to be a software issue. why it shuts off gps at times.

Is Galileo enabled as Sony's promise?

Stefanos1999 said:
Is Galileo enabled as Sony's promise?
Click to expand...
Click to collapse
What is Galileo? never heard of this. Is it a GPS feature or improvement? Such a fancy name.

CKkio23 said:
What is Galileo? never heard of this. Is it a GPS feature or improvement? Such a fancy name.
Click to expand...
Click to collapse
Galileo is a new GPS system developed by the EU, like GLONASS is the russian GPS and Beidou the chinese GPS.
And to answer the question, yes, our phone supports Galileo.

Artyomska said:
Galileo is a new GPS system developed by the EU, like GLONASS is the russian GPS and Beidou the chinese GPS.
And to answer the question, yes, our phone supports Galileo.
Click to expand...
Click to collapse
Yes, XZP supports Galileo. But it has not been enabled yet. :/

Had the same problem, gps not locking until I purged assistance data and rebooted the device, then it worked fine for about 48 hours until I had to repeat the process.
I completely solved this problem by uninstalling Google play services updates. This was a known issue for other phones some years ago.
Can anyone else confirm this solution?