yashsingh1/xdaforums huggingface dataset:
[Galaxy S I9000 General] dnsp:
Guys, not really sure if someone already mentioned this, but since I modified my gps.conf file and changed from NTP_SERVER=north-america.pool.ntp.org to NTP_SERVER=europe.pool.ntp.org my locks are blazing fast now. I get a lock in less than 5 seconds with clear sky.

You also can instal FasterFix from the market that changes the gps.conf automatically.

Take a look:

http://xdaforums.com/showthread.php?t=731462

http://xdaforums.com/showpost.php?p=7240556&postcount=2

and http://www.pool.ntp.org/en/

regards
​
[Galaxy S I9000 General] Oletros:
With my phone, coPilot has the same accuracy than Google Navigation, crap.
[Galaxy S I9000 General] nzahorchak:
I'm experiencing the same problem on my T959 running 2.1 and still looking for a fix/work around if anyone can help.
[Galaxy S I9000 General] w1nter456:
I think u should open a new thread about this post，if possible make a tutorial video. . .share with us and u won't regret on it !
[Galaxy S I9000 General] redeuxx:
Thanks for this. Unfortunately, it didn't help for me and I've been trying everything here on xda. At least I know what I'm looking at in test mode now.
[Galaxy S I9000 General] NeoXTC:
Anyone tried BUJP8 rom yet?

So far I think the signal had greatly improved. Still going everywhere when I'm in the city with tall buildings but it's alot better than before. Shall continue to test.
[Galaxy S I9000 General] crypta:
did anyone mentioned the following?

I recognized a great improvement in my GPS track data, as soon as I switched off the WLAN and sensor support in location and privacy (or however the menu item is named in english versions).

to me it seems, if I enable anything else than GPS to locate me, all the vast of data will be merged and given to the programm as "GPS signal".

also I recognized that some programs (all?) seem to compensate the temporaly failure / worst signal from GPS with motion data.

I assume this, by the fact, that... if I were in a pretty bad reception area.. my track record just jumped in the same direction, with the same speed as I had before the signal "loss".

in my conclusion: without wlan and sensory enabled, it takes much longer to get a fix.

but the accuracy impoved for me greatly.
[Galaxy S I9000 General] lunasea:
I can confirm this. Tested this rom and gps accuracy is way better. Lock was fast and although it took about 15-20m to stabilize my position on first run, after that it tracked me on spot and followed me faster than on previous roms (more aware of my turns while driving). Using NDrive, haven't tested with google maps.
[Galaxy S I9000 General] -Loom-:
Same here. The phone wasn't even mounted on the windscreen, just laying on the seat beside me. Accuracy was spot-on. I'm kinda surprised.

But maintaining a fix was never really a problem. The random drift - mainly in urban canyons - that's the holy grail. Let's see how this works out.
[Galaxy S I9000 General] madmack:
Question to those of you using Doc's BUJP8: have you tried any of his earlier versions ? did they work as good as his latest version ?

I had a peek at the files we try to modify here and in many GPS threads, and they seem to be intact. I have a theory that the reason why his ROM performs so well, is because of the way you flash it. Have a look at the updater file, it actually wipes clean your /system and data and dalvik-cache.. it leaves no trace of any older version crap in there.

I remember having good GPS performance when I first moved to Froyo. (It involved flashing with Odin with a PIT but without any PDA/modem/CSC). Ever since I moved away from that initial Froyo ROM, I've been struggling to get it back to what I expect it to do. So maybe Odin doesn't format before overriding system files (including GPS files), or maybe GPS cache needs to be cleared out somehow when switching between ROMs ? Anyone can chime in on this ?

I've also been experiencing with different setups on my phone, and yesterday I got this incredible tracking (yes, in google maps), so I'll test it out more and share it with all of you if it doesn't go crazy again.
[Galaxy S I9000 General] Bynar010:
YOu

I hope you are wrong about this as it probably means the joy is temporary and will degrade over the next week or 2 like it did in the early days after a flash. :o(
[Galaxy S I9000 General] madmack:
Well, I certainly hope that too.

But I don't think the files themselves degrade overtime. I'm just guessing that the switch itself causes the corruption if we don't wipe /system /data dalvik-cache.. etc when we flash new ROMs over old ones.

I had some solid GPS performance for about 2 weeks when I first jumped the Froyo ship. Things went down hill pretty quick when I started changing to different ROMs without "repartition" checked. Even if you did click repartition with a PIT file, and had your your pda/csc/modem files loaded, I dont' think Odin implicitly deletes anything. It merely overrides them, hence, our problem.

I'm looking at Doc's rom, there seriously isn't anything that different than all froyo roms released. If you look in init.rc , the jupiter.xml file is pretty critical because it gets loaded everytime you reboot. It has some settings such as refresh rate, supl settings.. etc .. and let me tell you, this is identical to all other froyo roms i came across.

checked gps.conf as well, same thing.

a nice test would be to have an update.zip that only deletes and formats /system and all other partitions. flash this update.zip via clockwork, then use odin to flash over whatever ROM you want without clicking "repartition". that way you have a spanking new rom on a freshly formatted disk
[Galaxy S I9000 General] jutezak:
I feel the GPS now works well for me. Froyo update didn't do this.

What I did was start the app "GPS status". Choose Menu, GPS & Sensors, Auto-download AGPS data, and choose "Download if older than 1 hour".

It may be coincidence. Don't know if this modifies a global setting or just what this app does.
[Galaxy S I9000 General] alijanismayilov:
Android 2.2 - *#*#3214789650#*#*
[Galaxy S I9000 General] ApnaDroid:
Can you provide GPS settings from this ROM ?
[Galaxy S I9000 General] NeoXTC:
Hey guys,

After about a week with BUJP8 Doc's ROM I can say that GPS is greatly improve (although still not 100%).

Fix is fast and also the accuracy is alot better, going through city with lots of tall buildings is still eratic. Compared to my Touch HD the only thing going for SGS is the quicker fixed compared to my HD. Otherwise the HD accuracy kicks ass.

I love my SGS but this GPS thing is really annoying..... :( Anyway further testing and mytracks plots to come (been mainly using iGO maps)

Cheers
[Galaxy S I9000 General] alijanismayilov:
Hi everyone.

First of all whant to thank you all for this website and all who help everyone to achive best results with our Android phones problems.

Now to the busyness. I am not that experienced as most of people here on forum so want to find out more about My Galaxy S i9000 16GB simfree UK official Froyo XXJPO phone. My GPS is not working, don`t want to fix, whatever I am doing to it.

I have noticed one interesting thing everytime I am in "LbsTestMode". In "Get position test" it will fixs only if there is more than 9 satelites in view and 5 of them in use, accuracy will be 5-10 meters. In this test mode it can find satelites without any problem and delay but in Google Maps and in stock Navigator never find my position until I turn on Wi-Fi if I am at home or mobile internet if I am driving. Parameters I have in my phone same as was described in this thread in the beginning. I am doing this test outside on the street or in my car with clear view to sky.

What can it be and why? :-)

I hope someone very experienced and clever will find the thread and medicine to all ours lovely Galaxy S :-)

P.S : sorry for my english if something is not right grammatically.
[Galaxy S I9000 General] t1mman:
I've just updated to froyo (JK3, should be the official for Bell Canada) and my first run was... well, pretty ugly :|

First run, Sportypal took a loong time to get the fix and lost it within 2 min. (so long for those results...) so I've installed tracker booster and it gave me, well, pretty much a "sawtooth" result:

http://sportypal.com/Workouts/Embed/797168?key=56387947eacc851adf12d14bfa69eb6c8e62f8ec&ms=0

(it can still be useable though, speed are most likely ok... but it's off a little)

So I've made some changes to the settings

Dropped accuracy to 30, change the SUPPL provider to auto and deleted GPS data. I'm gonna try to make another run tomorow and see if it helps
[Galaxy S I9000 General] nwsk:
Hmm, did you post this article too? http://www.androidng.com/fix-galaxy-s-gps
[Galaxy S I9000 General] waltcoleman:
Just a brief note of thanks for the detailed explanation of the different GPS settings! VERY helpful to know what the different settings mean as opposed to just random experimentation. Now I hope to see some improvement.
[Galaxy S I9000 General] menerio:
Hello everyone,

I bought my SGS a month ago and use it in Turkey, recently updated to 2.2 XXJPO. I can't say that I have a GPS fix problem, I followed the directions on this topic and my SGS seems to get a fix with a deviation of 5 - 10 m. My question is a little bit different. When I get a fix on Google Maps after 15 - 30 sec. the phone closes its screen automatically, for power saving, when I click the power button it turns on but I notice that every time GPS is trying to get a satellite lock again and again.

Is there any way to hold this fix steady ?

Something like do not go to stand by mode after gps fix etc.

Thanks in advance... :)
[Galaxy S I9000 General] nwsk:
hmm, not sure if you can set that in the app itself, but i just use tasker to do things like that
[Galaxy S I9000 General] t1mman:
Tracker Booster could help on this
[Galaxy S I9000 General] menerio:
Thanks for the advice.

Tracker Booster may handle the situation.

Eventhough it is a third party app I can gain some time when I power it up by avoiding fix need for each black screen return.
[Galaxy S I9000 General] hardrock121:
on samsung epic.. these settings dont work unfortunately.. ofcourse i have the stock android rom no custom rom and i ve no idea how to get this stupid gps working.. i tried the cold start method .. didnt work.. tried some of the settings (whatever i cud see) in this tut.. n still no effect..

HOW CAN I FIX MY DAMN EPIC'S GPS?
[Galaxy S I9000 General] LiverpoolFCfan:
Sorry to cross post - I had started a new thread on the GPS issue this evening to highlight my findings with what seems to be a direct correlation between the power handling of the button backlight and the GPS signals. And a simple test to see it in action.

I am not sure which approach is right - to post a link here - or to reproduce the entire post here ?

Any way, here's the link.

http://xdaforums.com/showpost.php?p=9551765&postcount=1
[Galaxy S I9000 General] tk44uk:
Have you ever managed to get any satellite reception?

If not, I would advise you to use the free app."GPS test" and do a cold start.

I put my SGS in 'flight mode', unticked wireless location, ticked 'Use GPS' and launched the GPS test app.

I was in open air, no building around (I was on a large beach) clear sky...

It took more than 10 minutes to get anything at all, but eventually I had 11 satellites with 7 or 8 locked.

After this, my gps gets a lock within a 40-60 secs.

Once you know that the GPS chip/hardware/antennae works, you can then look at the next steps...

edit: I believe a cold start can take more than 10-15 minutes.

PS make sure the screen stays on
[Galaxy S I9000 General] hardrock121:
I did get the gps test app and tested it out the other day and found ihad about 7-8 satellites in view and locked on to 3-4 ..but this is downtown with buildings around.

Either way it took 10-15 mins to lock on.

The confusion I have is.. should i use cold start or hot start? Ms based /assisted/standalone? I dnt use wifi location however. I get a accuracy of 80-90ft which seems odd.

Also some days ago, while moving it was off by almost 90-100 ft and was showing me moving away from the road. This thing is really effed up and its insane to see samsung not accepting the issue. May be they should come to US and test it rather than sitting in Japan...

/s
[Galaxy S I9000 General] tk44uk:
10-15mins is normal for a cold start.

Once you've done a cold start, that satellite data will be valid for some time (several days), if you stay in or around the same geographic region.

Therefor, you should get a fix within 30 secs to 1 minute, each time you bootup/start the GPS.

If you have data internet via your sim card, you can set the SUPL/CP Settings to get the sat data automatically - the OP describes the various setting in his post #1 of this thread.

This won't necessarily affect/improve the accuracy, but should make for a quicker startup.

As to what causes the problems with accuracy, who knows? (I'm pretty sure Samsung people know...)

I do know that this device is capable of showing static position accurate to 1 to 2 meters, (I have verified this several times)

but sometimes it can 'jump' to a wrong position...
[Galaxy S I9000 General] Frenzy_Man:
Helloto everyone. My GPS seems to work properly. (no signal lost in little towns with high building, tracks works goo) unfortunately when the screen turns off the(standby) GPS go off (does not lose the signal, it turns off) and when i turn on display again gps restart.

how can I fix this?
[Galaxy S I9000 General] elrojo:
Hey guys, it's likely not news, but it does indeed seem to be a hardware issue.

The fix isn't for the faint of heart.

http://xdaforums.com/showthread.php?t=878970

The spring contact connecting the phone seems to be the culprit.

Some suggest bending it upwards slightly.... I broke mine off (thanks to manymal) and added a carefully dosed dab of solder.

After screwing the case back on, my phone continues to be stable, calling and wifi are unaffected (different contacts obviously, but it was one of my fears). Indoors I get a lock in less than 20 seconds, connect to 4-7 birds. And get an accuracy of 18-30 feet pretty consistently. Also of note the SNR bars in GPSTest seem to be more stable (waaaay less variance from sample to sample).

I'm sure there are all kinds of terrible repercussions but it works beautifully.
[Galaxy S I9000 General] audiyu:
hi guys i wanna share this with u all think it will work for most ppl! I know y my Samsung Galaxy S i9000 GPS is inaccurate.If u use gps with advanced task killer it will be inaccurate, since i deleted task killer every rom have accurate gps now!!!!

HOPE IT WILL HELP U GUYS 2. and sorry for my bad english.
[Galaxy S I9000 General] Landorin:
Thanks a lot, dangrayorg, for this excellent guide.

With standard Froyo I had similar settings, except that accuracy was set to 50 by default. I still have to run more tests but so far it seems the accuracy did improve after I changed it to 30m.

On a general note, it seems the Galaxy GPS seems to have less issues with accuracy when you're not driving really fast ( > 120 km/h or so).

Anyways, there was only one strange thing I noticed:

If I understood correctly, according to your guide MS-based mode enables APGS (or at least something) to assist on getting an initial lock faster but shouldn't affect accuracy. Thus I switched to that mode and since then it takes more than 5 minutes to get a lock at all, even when having downloaded AGPS in the GPSTest app.

Today, I switched to standalone mode and got an initial lock in less than a minute, tried this several times, quite interesting. Now I guess with standalone I no longer can use AGPS but if it locks at this speed then I won't need it anyway. ;)
[Galaxy S I9000 General] dangrayorg:
I've updated the OP with a fantastic fix from the Captivate forums which may spell and end to all your worries.
[Galaxy S I9000 General] borelis:
I've used this fix. It's fenomenal! GPS is working like it's supposed to!
[Galaxy S I9000 General] twe69:
Hi dangrayorg thanks for the link. Noticed that you are in the UK, which zip file did you try?

Also noticed its a fix for A-GPS rather than GPS right?
[Galaxy S I9000 General] twe69:
I tried the fix and only noticed a slight improvement, am wondering if I bended the clip high enough, might try it a 2nd time.

Did you bend the clip or do the solder trick?

Thanks.
[Galaxy S I9000 General] Korshar:
Yea, which zip out of the three is the best? And do you just need to install this zip from cwm and nothing else? Or do you have to change any settings after installing the zip??
[Galaxy S I9000 General] Metusion:
I managed to do it as well, but I still have crap signal in the city and it still fluctuates and deplaces a lot.. this GPS problem is getting on my nerves. The navigon arrow always points in the wrong direction too.. seriously how hard could it have been for Samsung to build in a proper GPS with the right software? Seems like the community has to fix every frigging issue
[Galaxy S I9000 General] dangrayorg:
This fix sorts out some A-GPS issues but the disabling of interpolation fixes the 'raw' GPS performance (i.e. what the chip does with the positional information from the GPS satellites).

I'm using the Google version of Da_G's mod if people are interested.

I've also never applied the hardware mod, I get great performance with my suggested settings and even better performance with Da_G's files.
[Galaxy S I9000 General] lucbl1:
Just i need to aply the CWM update.zip from Da_g post and everything will be ok? Or do i need to dive into more advanced configurations? Could someone please write a short tutorial just to point me the right way?! Thanks in advance!
[Galaxy S I9000 General] spyrale:
applied the file posted by Da_g (from recovery), google one, i have the same settings of the opening post (by default), only accuracy is different (50) with Doc JS3 9.1.3...worst gps experience ever, even with Ndrive cursor jumped all over the place (always worked fine before) and lost gps signal several times. i applied the "fix" soon after flashing the rom, so i don't know what is the cause of this behaviour. before i was on doc jpy and had a decent gps performance with google navigator, almost perfect with Ndrive. now i'm going to flash again and see how it goes.
[Galaxy S I9000 General] Arcaziel:
My GPS fix very fast, but the accuracy is soooo wrong, like 5km away from my position!

I'm gonna try this later! Thanks
[Galaxy S I9000 General] pixie77:
I returned my i9000 for repair today, the GPS is really p**sing me off right now. I'm off skiing in a month and would have liked to recorded my tracks, I tried a few practice runs on my bike and it's awfull, I get good lock but then it drops for no reason. Using GPS test while stationary in an open area the satelites never settle they just keep coming and going, good lock 10 sats, no lock 3 sats.......while on my friends Desire the're nice and stable. Any way it's back in the shop, lets see what they come up with, hopefully a new i9000 with working GPS.

Without my phone to play about with I don't know what I'm going to do for the next week or two, I may actually sit down and speak to the wife!
[Galaxy S I9000 General] ce300:
What is normal dBHz? 100dBHz?
[Galaxy S I9000 General] boliveira2:
After applying Da_G fix ( see Captivate forums )and using GPS Aids app ( see Galaxy S Android development forums ), that seems to correct the AGPS problems and I get a first fix fast ( around 20 seconds ) all the time and I can use ndrive to navigate. Not perfect but usable.
[Galaxy S I9000 General] ce300:
My phone gps locks very well. But i have problem. When i use IGO8 gps its lag very much. Is this gps fault on igo8 software failure?
[Galaxy S I9000 General] RCinFLA:
Are you on an iPhone? Did not see they have an Android version.

If you are only on GSM then map downloads would be slow.
[Galaxy S I9000 General] bacha_13:
cheers for the guide will try it soon
[Galaxy S I9000 General] ce300:
Yes IG08 is avable for andorid os. I dont have iphone i have i9000. And i dont use GSM cards like googlemap or something that. I have IG08 and cards data is in phone memory. Same lag is too when i use some gps speedometer program. Always have lag. This is so annoying i cant use dynomaster etc. All gps apps lags. :mad:
[Galaxy S I9000 General] Johnny55555555:
Think matey is right, and it is down to carrier.

on 3 first fix is usually around 15 to 30 seconds, and accuracy on first fix is 82 feet, which increases to 30 feet within a further 30 seconds, from then on it is rock solid, as good as a tomtom... if not better.

YMMV (with network)
[Galaxy S I9000 General] ce300:
Is the lag is due to the low dBHz? What is normal dBHz? 40 and above?
[Galaxy S I9000 General] betoNL:
I have an sgs and I run iGo 8.4.2 and before that iGo Motonav (800x480).

iGo software is RAM hungry, so if you care about checking how much available RAM you got, before starting the app. , that will help you to run iGo more smoothly just like I do(see my first video on my signature)

On that video I was on eclair and was using an external bluetooth gps receiver.

Today (after the arrival of the 2.2.1 firmwares) I dont need an external gps receiver no more)

Outdoors, I get stable sat fixes between 1-3 minutes during a cold start and I run programs like iGo 8.4.2 and Aura flauwlessly.

Full Agps (supl) is disabled on my sgs and I use progs like Gps status and gps aids mostly to reset gps data.

I did "adapt" the gps.conf file just in case and I am still testing some settings.

My sgs gps experience (car navigation) is getting better and better and all my other standalone gps devices ( all equipped with sirfstarIII chipsets) are getting rusty....
[Galaxy S I9000 General] madmack:
how do you disable supl completely ? is it something you set in LbsTest ? or did you mean the Use Wireless Networks check under Location and Security ?
[Galaxy S I9000 General] betoNL:
Next to the fact that I dont have any APN configured and for data connection I use wifi only, I also disabled full Agps within Android, following a "tip" that I found in an older thread from CLShortFuse:

His thread:

http://xdaforums.com/showthread.php?t=789383

The GPS on my lost Nokia 5800 wouldnt work without A-gps.

But gladly my sgs's gps can work without full Agps.

I know that for a fact and I use GPS on a daily basis

Ps- I use only onboard ,turn-by-turn voice guided car navigation software and I have no experience with Offboard progs like google navigation
[Galaxy S I9000 General] madmack:
Woa :eek: thanks for the detailed answer. I'll give that a try because I suspect these AGPS initial values are responsible for the crappy tracking accuracy.
[Galaxy S I9000 General] ce300:
Hi!

Is somewhere youtube or something video too? I dont know where i must put these codes.
[Galaxy S I9000 General] betoNL:
I wouldn.t mind if you hit that "thanks" button :p
[Galaxy S I9000 General] betoNL:
which codes?
[Galaxy S I9000 General] ce300:
By CLShortFuse

You can disable AGPS this way

Code:

adb shell

su

cd /dbdata/databases/com.android.providers.settings

sqlite3 settings.db

update secure set value="0" where name = "assisted_gps_enabled";

.quit

reboot

Where i must write it?
[Galaxy S I9000 General] betoNL:
You need adb:

http://xdaforums.com/showpost.php?p=7239659&postcount=3
[Galaxy S I9000 General] ce300:
I was fool. My GPS worked very well. I holded every time i tested my phone around where gear shifter knob is. There was weak signal and was laggy. Put now i tried to hold it near to the windsheld and was very good. Is GPS accury better smaller number than bigger? Like that 5m is better than 15m ?