Database Users

(In progress)Eugene Vibrants GPS fix for the Samsung captivate

Ok guys i already 'ported" the fix, but i need someone with a pure stock rom to dump the following files from there hes/her device:
build.prop found in /system
contents.db found in /system/csc
customer.xml in /system/csc
feature.xml in /system/csc
others.xml in /system/csc
sales_code.dat in /system/csc
You can use root explorer to copy this files over to your sdcard, and post them here, thank you.
Rafyvitto

http://www.4shared.com/file/1kaJd5Kl/Stock_Files.html

Fortune090 said:
http://www.4shared.com/file/1kaJd5Kl/Stock_Files.html
Click to expand...
Click to collapse
Excellent thank you, il keep you guys updated.

Can someone with stock gps settings test this update.zip, http://www.mediafire.com/?g4p1kyiie6d3xov , let me know if it works, as always do a nandroid backup just in case your phone turns into an iphone or something, AND im not responsible if your device catches on fire or decides to leave if you after applying this update.zip =]
Intructions Step by step:
1.Place Captivate_GPS_Eugene_Fix.zip in you internal Sdcard
2. Go to rom manager choose "boot into recovery"
3."install zip from sd card"
4."choose zip from sd card"
5.Scroll until u see 'Captivate_GPS_Eugene_Fix.zip' the hit the power button.
6."Yes - Install Captivate_GPS_Eugene_Fix.zip"
7.Go back to the first menu and hit "reboot system now"
8.Let me know if it works

still takes a while to find me... my iphone4 found me in about 3 seconds

That means its not working =], on the vibrants it locks in a few seconds. =/, anyways i told eugene to take a look at it, maybe he can figure out whats wrong.

First time (cold start) took roughly 5 minutes. Then turning off GPS and waiting 15 sec before restarting GPS, hot start took only 5-10 sec.
I will leave it off for about 10 min now and report back if GPS aquisition is quicker after the first lock.
UPDATE: After about 10min of GPS off it took only 5 sec to re-aquire the satelites. I had 7 sat showing and 5 of them had a lock with 5m accuracy. Maybe you are onto something. May I ask what the fix actually does?

getting a lock is a minor problem compared to MAINTAINING an accurate lock, does this fix address that issue or just the lock on time?

Thats good news.
Although its a little sad if this is fixed by a community dev before samsung.

anosis said:
First time (cold start) took roughly 5 minutes. Then turning off GPS and waiting 15 sec before restarting GPS, hot start took only 5-10 sec.
I will leave it off for about 10 min now and report back if GPS aquisition is quicker after the first lock.
UPDATE: After about 10min of GPS off it took only 5 sec to re-aquire the satelites. I had 7 sat showing and 5 of them had a lock with 5m accuracy. Maybe you are onto something. May I ask what the fix actually does?
Click to expand...
Click to collapse
Ask eugene_373 he knows the details about the fix, i just tryed mirror hes finding on to our captivate.

Ok. Took a drive and 20min into the drive enabled the GPS. It took less than 5 sec to get a lock and the tracking was spot on for me.
One side effect I have noticed is that my screen would usually turn off after 30sec. (confirmed that my screen off setting is 30sec) however the screen will stay on for longer. It darkens but will not turn off in the amount that is set.
Only worry with this is the obvious battery drainage and the fact that you may end up randomly dialing folks because you assume the screen turned off.
WOW! The screen is still on even after 5min. This is even the case when the PWR button is acidentally pressed and you are on the lock screen - it will just stay there. Not so good.

rafyvitto said:
Ok guys i already 'ported" the fix, but i need someone with a pure stock rom to dump the following files from there hes/her device:
build.prop found in /system
contents.db found in /system/csc
customer.xml in /system/csc
feature.xml in /system/csc
others.xml in /system/csc
sales_code.dat in /system/csc
You can use root explorer to copy this files over to your sdcard, and post them here, thank you.
Rafyvitto
Click to expand...
Click to collapse
So is it safe to say you have the captivate running with the
vibrant 1.1 update zip release running with the gps ? If so I would happily run some testing for you

I applied this fix to my captivate and the gps does seem marginally better but it has the unfortunate side effect of not turning off the gps after I exit the application that is using it. I just went through approx 45% of my battery in 2-2.5 hours and I noticed the gps at the top had been trying to lock on this entire time.
Edit:
I just used task killer to kill all open apps and the gps was still actively searching (noticed on my taskbar) despite the fact the all open apps were closed.
I had the turn off the gps using the Power Control widget.

I'll help as well. Got rooted stock with AT&T crapware removed, and RM/CWM installed for backup/restore. Let me know what I need to do.

[email protected] said:
So is it safe to say you have the captivate running with the
vibrant 1.1 update zip release running with the gps ? If so I would happily run some testing for you
Click to expand...
Click to collapse
No, i ported eugene_373 vibrants gps fix over to the samsung captivate, the original vibrant gps fix wont work simply because of different build.prop's, but regardless the fix dosnt seem to fix the gps on the captivate, im waiting on eugene_373 to see if he can look at my update.zip and some how figure out whats wrong...

dweebs0r said:
I applied this fix to my captivate and the gps does seem marginally better but it has the unfortunate side effect of not turning off the gps after I exit the application that is using it. I just went through approx 45% of my battery in 2-2.5 hours and I noticed the gps at the top had been trying to lock on this entire time.
Edit:
I just used task killer to kill all open apps and the gps was still actively searching (noticed on my taskbar) despite the fact the all open apps were closed.
I had the turn off the gps using the Power Control widget.
Click to expand...
Click to collapse
I haven't experience any of does issues on my device, besides this only changes 2 lines in the build.prop, nothing major, my gps stops trying to lock me once i go out of google maps, it doesn't turn off, it never does, thats not how it works, you always need to turn of the gps manually after using a gps app.

rafyvitto said:
I haven't experience any of does issues on my device, besides this only changes 2 lines in the build.prop, nothing major, my gps stops trying to lock me once i go out of google maps, it doesn't turn off, it never does, thats not how it works, you always need to turn of the gps manually after using a gps app.
Click to expand...
Click to collapse
I think he means that he still sees the little GPS icon at the top, if its still there after exiting maps, the gps is constantly searching- thus draining a crapload of battery.

Didn't fix my GPS, still not getting a lock.

I'm so confused that people are still having issues with there gps. There is a fix out there in the forums and on plenty of sights by changing to supl.google.com amongst other settings. At most it takes 20 seconds to lock. I've used it in navigator and google maps and it follows me everywhere. Does this not work for everyone?
Sent from my SAMSUNG-SGH-I897 using XDA App

Diffed Eugene's changes
I've diffed Eugene's changes compared to a stock Vibrant and here are the details:
The first relevant change is the GPS section in customer.xml. The Captivate's customer.xml does not have this section at all.
Vibrant Stock \system\csc\customer.xml
Code:
<GPS>
<NbAGPS>1</NbAGPS>
<AGPS>
<ServAddr>lbs.geo.t-mobile.com</ServAddr>
<Port>7275</Port>
</AGPS>
</GPS>
Eugene \system\csc\customer.xml
Code:
<GPS>
[COLOR="Red"] <GPSMode>agps</GPSMode>[/COLOR]
<NbAGPS>1</NbAGPS>
<AGPS>
<ServAddr>[COLOR="Red"]i[/COLOR]bs.geo.t-mobile.com</ServAddr>
<Port>7275</Port>
</AGPS>
</GPS>
The second change is to add new settings to build.prop. Most of these changes appear to do with the modem but the two agps lines appear to be the relevant ones.
Vibrant Stock \system\build.prop
Code:
rild.libpath=/system/lib/libreference-ril.so
rild.libargs=-d /dev/ttyS0
ro.sf.lcd_density=240
persist.sys.timezone=America/New_York
Eugene \system\build.prop
Code:
rild.libpath=/system/lib/libreference-ril.so
rild.libargs=-d /dev/ttyS0
ro.sf.lcd_density=240
[COLOR="Red"]ro.ril.gprsclass=12
ro.ril.hsdpa.category=8
ro.ril.hsupa.category=5
ro.ril.hsxpa=2
ro.telephony.default_network=0
ro.ril.def.agps.mode=2
ro.ril.def.agps.feature=1
ro.secure=0
ro.debuggable=1
persist.service.adb.enable=1[/COLOR]
persist.sys.timezone=America/New_York
It appears to me that this fix is trying to enable AGPS in much the same way as the LbsTest menu fixes have tried to do.
I tried adding the GPS section to my customer.xml using supl.google.com and 7276 instead of T-Mobile's server/port. I also added the two agps lines from build.prop. I cannot tell that it mas made any substantial improvement.

gps fixed without hardware changing. located in 10s

make sure your wifi/apn work well.
it works great on NERO V3 and V4.1
method:
dial *#3214789650# into lbs
first choose:app setting
1:Sessing Type
(Tracking)
2:test mode
(H/W Test)
3p mode
(H/W Sensitivity Test)
4:start mode
(Cold start)
5:GPS Plus
(ON)
6:
(ON)
7:
(50)
8:
(OFF)
second choose supl/cp setting
1: FQDN type
(Custom Config)
2:
supl.nokia.com
3ort
7275
4:SUPL security
ON
5:AGPS mode
(SUPL)
then back to home and reboot your device.
after it, get into lbs again
1.choose delete gps data
2.get position test
3.after located, change 1st "cold start" into "hot start".
completed.
get more detail from
bbs.gfan.com/android-503202-1-1.html

I had 3 and now running 4.1. GPS picked up within 3 - 4 seconds with v3. With 4.1 my GPS picked up in 2 seconds. I did not have to modify any files.
Sent from my SGH-T959 using XDA App

Here's the best fix:
1.) Install Nero 4.1
2.) Leave it alone.
The end.
If that doesnt work:
1.) Install Nero 4.1
2.) Do the hardware fix
3.) Leave it alone.
The end.

my solution: get a new phone once a suitable 4" replacement comes out on t-mobile.

it works!
this by far is the best solution!
I get 10m accuracy now whereas i used to get 1200m before...

Let me try it a bit more, but it seems it works!
Sent from my SGH-T959 using XDA App

HOLY ****?
i got 10 satellites in 5 seconds, then they all started connecting and now my accuracy is 12 meters???

I think your all connected to wifi, maybe thats why your getting good locks. Disable it and try again.
Sent from my SGH-T959 using Tapatalk

I was out walking my dog this morning (no wifi) and while yes I was in a clearing, I turned on GPS Status for the first time since installing the new rom so it came up with the default html page explaining GPS Status, but I read it before so I closed it immediately and was already locked onto 8/11 birds. 2 seconds maybe. 7m accuracy.
On the flip side when I first got my phone I tried to use it as a GPS to navigate and drove around for 30 minutes without ever locking onto a single bird.
I understand and do believe there is a hardware problem with many Vibrants however I also believe that there has been a HUGE software problem as well.

iwillkillyou said:
I think your all connected to wifi, maybe thats why your getting good locks. Disable it and try again.
Sent from my SGH-T959 using Tapatalk
Click to expand...
Click to collapse
I've been using OP's "fix" for 3 days and so far it's working very well. I typically get locks in 10s or less, and accuracy 15-30 ft, inside. I nearly always disable wi-fi when I test GPS, but I've tried it both ways with this setup and it's working virtually the same either way.
At this point my only reservation is I've seen so many similar suggestions to tweak some setting that don't really pan out over time. This one may do the same, but so far so good.

I have done nothing but installed axura rom.ine locks in couple of seconds and works flawllesly. Even the accuracy is fantastic.

My gps went from bad to worst, 600 metter accuracy, maybe its the rom, ill try teamwhiskey. i been crying for a working gps lately.
Sent from my SGH-T959 using Tapatalk

I do see a improvement will check it out for a few days to see if it holds

Not perfect but now I actually can get a GPS signal, which is a plus

adiprince1 said:
I have done nothing but installed axura rom.ine locks in couple of seconds and works flawllesly. Even the accuracy is fantastic.
Click to expand...
Click to collapse
I had applied both the hardware and software fixes while using many versions of Nero and my GPS would never get quick locks, usually it wouldn't lock at all.
Flashing Axura fixed my GPS too. Locks within seconds and has 7-9 meter accuracy.
Axura also fixed my fiance's GPS (with no hardware fix). She had the same issues with every other rom, slow/no locks. So I know it wasn't only my device.
I don't know what method Devs4Android used to fix the GPS, but it works perfectly. They need to sell the fix to Samsung so customers can get functioning GPS out of the box.

never had a problem with the gps locking on to sats and getting 20-40 foot accuracy. the problem is the drifting and staying locked once you start moving or just standing there. that is the problem i have. driving down the highway and bam your on the other side going the wrong way, or in the middle of the field a mile away. that is problem i have

fioricet said:
never had a problem with the gps locking on to sats and getting 20-40 foot accuracy. the problem is the drifting and staying locked once you start moving or just standing there. that is the problem i have. driving down the highway and bam your on the other side going the wrong way, or in the middle of the field a mile away. that is problem i have
Click to expand...
Click to collapse
Thankfully, Axura fixed that for me as well. Not only does it lock fast, but its accurate too.

After 2 days.
Last 2 days, I've tested my GPS in some different scenarios. In every one it has been quick and accurate enough.
I got 8 satellites in average, and the accuracy was of around 7-8 meters, something that has never happened before. I did the hardware fix, and it helped with the SNR values, but this is the definite best solution yet!
I'm still testing, but I've got a very good feeling about this method.

The only difference I see between this "fix" and other "fixes" is changing the SUPL server to supl.nokia.com. Since the original thread came from a Chinese forum, I'm guessing the SUPL server might work well in China. Not sure how effective this would be in the US or other countries.
That said, this isn't really a fix. All it does is change the SUPL server, which for most of us (using supl.google.com) works just fine. The Cold Start -> Delete GPS Data -> Lock -> Hot Start method will work just once because it clears bad cached GPS data if you've moved, but it's old news (dozens of other threads on this one) and it's not really a "fix."
The hardware fix is still one of the few real fixes out there.

jamesyl said:
The only difference I see between this "fix" and other "fixes" is changing the SUPL server to supl.nokia.com. Since the original thread came from a Chinese forum, I'm guessing the SUPL server might work well in China. Not sure how effective this would be in the US or other countries.
That said, this isn't really a fix. All it does is change the SUPL server, which for most of us (using supl.google.com) works just fine. The Cold Start -> Delete GPS Data -> Lock -> Hot Start method will work just once because it clears bad cached GPS data if you've moved, but it's old news (dozens of other threads on this one) and it's not really a "fix."
The hardware fix is still one of the few real fixes out there.
Click to expand...
Click to collapse
So I take it you haven't tried this. I agree with what you say, however, I've been using OP's suggested settings for 4 days and see a significant improvement in lock times (only exception is I leave it set to Coldstart). I've been turning my phone off at night and after booting yesterday morning it locked in 14s first time, this morning in 7s. I know lock times can vary depending on where the sats happen to be at that moment, but this performance is much better than I was getting previously, which was in the 1-4 min range on first lock of the day. It's so simple to try there's no real reason not to see if it helps, unless you're already getting lock times like this. Only time will tell if it lasts, but so far so good.
(Running pure stock JI6, and I've also done the HW fix posted in the sticky, which definitely improved my SNRs.)

GPS UK

right I have to know if its only me but even after editing the gps config file it still only works every now and then and even that requires gps status and tools? At the moment using WP7 and gps is lightning fast (fix etc) but switching back to android as android is most definatly superior in most cases at the moment. Especially the camera quality is bad and battery life is ok but better on android
Is there a rom with a WORKING gps not one that works under supervision? as I like to use the gps apps like maps and copilot etc

OK well just changed a couple things and now gps is working
I dont know whether Radio revision affects it but downgraded it to 2.12 from 2.15 and left my gps location as europe after clean flash and now getting a gps fix under 10 secs mass improvement to before (2 mins to never)
might try with UK ntp.pool settings, and see the results

Edit as you like, but < 10 seconds is about as good as it gets, don't fixit if it ain't broke!

well tried it anyways and it is even better >5 seconds is this a radio related. If so gotta write down this radio version for future reference

You get quicker fixes when you've already recently had one, I don't think a <5 seconds cold fix is possible.

willzrocking said:
OK well just changed a couple things and now gps is working
I dont know whether Radio revision affects it but downgraded it to 2.12 from 2.15 and left my gps location as europe after clean flash and now getting a gps fix under 10 secs mass improvement to before (2 mins to never)
might try with UK ntp.pool settings, and see the results
Click to expand...
Click to collapse
This is intresting.
Is it possible to keep us updated in a couple of days to check if the quick fix is consistant with radio 2.12 ?
I think it would interest alot of people.

My phone was also with 2.15 previously, as willzrocking i experienced mixed result with this radio and long time locks in any case.
This morning i was encouraged by this post and gave 2.12 a try, unfortunately for me it seems tobe no go, it seems worst than 2.15 on my phone.
In the same road to my office (10 minutes by car) 2.15 was able to lock 1 or 2 minutes before i reached destination (not really usefull...), 2.12 was not able to catch the signal.
I'm going to try have a lock in a plain surface later on today and will let you know the results.
Cheers.

Still working good for me... I am using the Cleandroid Rom but even though the gps is now very good the network keeps dropping alot and sometimes randomly the H signal disappears and replaced with G sometimes until I switch between flight mode so think I am gonna have to sacrafice the GPS until I find a better radio/rom

I've just put on 2.12 here in the UK and don't notice any real difference at all
EDIT: ooh think i've now solved it for me!
I also have an Orange San francisco ( ZTE BLADE) and that always locks on GPS very quickly...
so i had a delve into the blade's gps conf and i notice a few parts were commented out that arent for my HD2.
the parts i just added/commented out are.
I added
INTERMEDIATE_POS=0
and commented out the following to look like this
#SUPL_HOST=supl.google.com
#SUPL_PORT=7276
Now after locking/unlocking the phone and rebooting i get a lock onto GPS in under 10 seconds every time, whereas before it was very hit or miss!
Out of curiosity, those who have problems, how many have the app GPS STATUS installed? i'm wondering if it is causing a problem too.

this thing is driving me crazy... as the gps is!
2.12 was worst than 2.15, then i tried 2.08, same as 2.12. So i did a roll-back to 2.15 and tried to put crunchie's settings into my gps conf.
Didn't notice any difference so i tried to remove gps status.
After reboot i made the following test:
launching google navigator 3 times, every time i placed the phone in the same position where i was sure to get good signals.
Between each tentative i removed the phone from its position, closed navigator, turned off and then on the gps, replaced the phone back.
It took 20 secs to do this operation.
I got a fix each time, which is good, but look at locktimes...
1) around 90" (good)
2) around 3 minutes...
3) around 4 minutes...
It seems like it doesn't save gps data previously scanned, every time it's like a cold start...
I really don't know if there is any way to fix this at the moment but i would really like to know which is the difference between my phone and yours. Maybe 'cause mine is brand new? (i received it the 4th of jan)

Very important for me too. So my parts:
RADIO: 2.15.50.14
ROM: MDJ's CyanogenMod 7 v. 2.6
COUNTRY: Latvia (EUROPE)
Actually this is the only Android build where I got any week GPS signal. Previously - nothing.
Well, on WM 6.5 GPS works extremely good and stable with the same radio.
I am using GPS Status (to download some A-GPS data, which really does not helps).
I live in Latvia, but my gps.conf was set to europe.pool.ntp.org. I was able to get some week connection today with a fix in approx. 10 minutes. When I changed my gps.conf to my country: lv.pool.ntp.org GPS stopped working. Will try now to revert back.
P.S. My friend with Desire HD also living in Latvia has north-america.pool.ntp.org, but still gets fix in about 30 sec. And changing gps.conf and downloading A-GPS data does not help at all.
NTP_SERVER=lv.pool.ntp.org
XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
SUPL_HOST=supl.google.com
SUPL_PORT=7276
Click to expand...
Click to collapse

crunchie-uk said:
the parts i just added/commented out are.
I added
INTERMEDIATE_POS=0
and commented out the following to look like this
#SUPL_HOST=supl.google.com
#SUPL_PORT=7276
Now after locking/unlocking the phone and rebooting i get a lock onto GPS in under 10 seconds every time, whereas before it was very hit or miss!
Click to expand...
Click to collapse
That sounds promising, so I've edited my gps.conf to match and I'll get back and let you know how I get on with it.
Incidentally, I used Navigator today for the first time in ages and didn't expect it to work as I flashed a new ROM over the weekend, but it worked a treat. I'm in the UK but it was set to use a North American NTP server, so I'm surprised it worked!
Glad it did though

johncmolyneux, so that worked for you?
Can you please post in QUOTE your full gps.conf text?

Synoptex said:
johncmolyneux, so that worked for you?
Can you please post in QUOTE your full gps.conf text?
Click to expand...
Click to collapse
johncmolyneux said:
I've edited my gps.conf to match and I'll get back and let you know how I get on with it.
Click to expand...
Click to collapse
I'll let you know mate.

Ok, I tried all that in different ways rebooting each time.
Only one time I had cold start and fix in 10 sec was: (changes bolded)
NTP_SERVER=xtra1.gpsonextra.net
XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
INTERMEDIATE_POS=0
#SUPL_HOST=supl.google.com
#SUPL_PORT=7276
Click to expand...
Click to collapse
This 10 sec. story was only once. Now I again can't accure sattelites. Will try to launch with gps.conf file fully empty. Will see, what it does.

Mine seems pretty stable now, but gps status seems to screw it up so for those still trying I'd advise you don't open gps status at all and/or force close it

crunchie-uk said:
Mine seems pretty stable now, but gps status seems to screw it up so for those still trying I'd advise you don't open gps status at all and/or force close it
Click to expand...
Click to collapse
I'll bear that in mind - thanks. I don't tend to use any extra apps anyway. We all know from WM days that the GPS in our phones is pretty good without it.
I'll try it tomorrow, when I drive a mile down the road to my local shop. And yes, I do know the way

crunchie-uk said:
Mine seems pretty stable now, but gps status seems to screw it up so for those still trying I'd advise you don't open gps status at all and/or force close it
Click to expand...
Click to collapse
Do you mean program GPS Status? Well, I'm using it to find a sattelites and then quickly switching to Google Maps. )))
Why do you think it can mess up the GPS reception? I'll try not to use that. Thank's.

Synoptex said:
Do you mean program GPS Status? Well, I'm using it to find a sattelites and then quickly switching to Google Maps. )))
Why do you think it can mess up the GPS reception? I'll try not to use that. Thank's.
Click to expand...
Click to collapse
When I open it to see what satellites are connected then go back to maps, maps is no longer as accurate even though gps status says it's locked.
It looks like it makes maps revert back to wifi or gsm triangulation.
Then if I go back to gps status, force close it then reopen it, gps status is no longer able to lock on nor Is maps.
So, I open maps, leave it for upto 20 seconds (usually under 10) it locks on to 2M accuracy
If I then open GPS Status, it says no satellites.
Exit back to maps and I'm no longer locked on and it doesn't seem to lock on again (cold start maybe.)
Then , force close gps status
Force close maps.
Reopen maps and I'm locked on again after a 'cold start' and then maps behaves itself again with under 5-10 second locks even after reboots and gps off/on

crunchie-uk said:
When I open it to see what satellites are connected then go back to maps, maps is no longer as accurate even though gps status says it's locked.
It looks like it makes maps revert back to wifi or gsm triangulation.
Then if I go back to gps status, force close it then reopen it, gps status is no longer able to lock on nor Is maps.
Click to expand...
Click to collapse
Oh, well, thank's. I experienced it today on a road, that after GPS Status, my Google Maps were jumping from GPS sattelites to Mobile Network Stations.
One more wish from you. Can you please post your gps.conf in a QUOTE here? I tried now this:
SUPL_HOST=lbs.geo.t-mobile.com
SUPL_PORT=7275
NTP_SERVER=xtra1.gpsonextra.net
XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
Click to expand...
Click to collapse
Actually not having anything with t-mobile, but I still managed to connect... after a while, after a long while....

GPS Issue(s) with DHD - Discussion / Solutions

Typical Complains / Rants:
1. GPS does not lock
2. GPS takes ages to lock
3. Keeps loosing signal / picks up very few satellites
4. Lock is not consistent, and fluctuates
Since quite a few users have struggled with GPS issues (including myself), I thought that I'll share my experience. I'm on Jellytime R10.1 and I believe that the GPS issues (as quoted by several users) is not related to the ROM. I've had GPS issues with a few other Custom ICS/JB ROMs. Instead it's related to the settings in the files,
1. /etc/gps.conf &
2. /system/build.prop
I have tried the fix provided by both MarcoHD (FasterFix) & crypted (AGPS Patch) and have had mixed, but unsatisfactory results.
So, I researched on the web for GPS lock solutions, for DHD (In the UK). Based on several findings I have been playing with my settings and have finally achieved a state where I can a really fast lock, with atleast 6-8 average Satellites. Configuration that works for me:
1. gps.conf needs to have correct entries for NTP_SERVER. Best way to locate those entries is to go to http://www.pool.ntp.org/en/, click on 'Active Servers' on the right hand side for your continent, and choose your country. At the top you'll see a set of 3 or 4 servers, and all of those need to be set in gps.conf, as below (UK in my case)
NTP_SERVER = 0.uk.pool.ntp.org
NTP_SERVER = 1.uk.pool.ntp.org
NTP_SERVER = 2.uk.pool.ntp.org
NTP_SERVER = 3.uk.pool.ntp.org
Remember that these should be the only NTP_SERVER entries in the file
2. I found this suggestion in the AGPS Patch (by crypted) and it worked for me. Edit the entry in the build.prop file as below:
ro.ril.def.agps.mode = "1" (Generally this value is set as "0" or "2"
After making the above changes, reboot the phone. Then load the GPSStatus app, and you'll see that it'll start latching onto Satellites, give the app sometime until it gets a stable lock, and you're good to go.
Disclaimer: I'm not an expert, and these are settings that worked for me, based on my limited research.
Now, the only outstanding issue I'm facing is the accuracy of the lock. I had a 100 mile journey today using Copilot, and the lock was absolutely stable, but accuracy was left wanting. Typical issues were encountered when there're roads that go under/over the motorway, parallel roads, slip roads, etc. The Sat Nav kept deviating into these other roads before reverting to the motorway on which I was.
So, the accuracy will be an area where I'll need more research, and suggestions from all ..

so other such as XTRA_SERVER, intermediate, c2k_host, supl_host etc shoud remain?

Yes I haven't disturbed any other parameter.
Sent from my Desire HD using Tapatalk 2

Same problems for me. I think my gps is not working in ics and jb roms. Need to check again with gb backup ROM..
Sent from my Desire HD using xda app-developers app

dg170775 said:
......
Now, the only outstanding issue I'm facing is the accuracy of the lock. I had a 100 mile journey today using Copilot, and the lock was absolutely stable, but accuracy was left wanting. Typical issues were encountered when there're roads that go under/over the motorway, parallel roads, slip roads, etc. The Sat Nav kept deviating into these other roads before reverting to the motorway on which I was.
So, the accuracy will be an area where I'll need more research, and suggestions from all ..
Click to expand...
Click to collapse
You could try this setting:
---------------------------
# Accuracy threshold for intermediate positions
# less accurate positions are ignored, 0 for passing all positions
# use only increment/decrement of 10 and DON'T go below 30
ACCURACY_THRES=5000
---------------------------

A thousand thanks to you.
this really has solved my gps issue...
now my phone locked damn fast than my girlfriend unrooted.
thank you very much.

havitoc said:
A thousand thanks to you.
this really has solved my gps issue...
now my phone locked damn fast than my girlfriend unrooted.
thank you very much.
Click to expand...
Click to collapse
That is really good to hear. Feedback on how's the accuracy when you use a sat nav..
Sent from my Desire HD using Tapatalk 2

Worked well for me too. Inspire 4G on cfX 0927. Now locks within seconds. 9 satellites.

bananagranola said:
Worked well for me too. Inspire 4G on cfX 0927. Now locks within seconds. 9 satellites.
Click to expand...
Click to collapse
How long did the first lock take?
Just tried these tweaks out and it's searching for sats now.

first lock will be longer (about 20-25 secs), and preferably try the first lock out in the open (not indoor)..
Also, if you're using GPSStatus App, then you can see that it'll keep picking up one by one SATs ..

PDub11 said:
How long did the first lock take?
Just tried these tweaks out and it's searching for sats now.
Click to expand...
Click to collapse
Nearly a minute. After that, several seconds.

dg170775 said:
Typical Complains / Rants:
1. GPS does not lock
2. GPS takes ages to lock
3. Keeps loosing signal / picks up very few satellites
4. Lock is not consistent, and fluctuates
Since quite a few users have struggled with GPS issues (including myself), I thought that I'll share my experience. I'm on Jellytime R10.1 and I believe that the GPS issues (as quoted by several users) is not related to the ROM. I've had GPS issues with a few other Custom ICS/JB ROMs. Instead it's related to the settings in the files,
1. /etc/gps.conf &
2. /system/build.prop
I have tried the fix provided by both MarcoHD (FasterFix) & crypted (AGPS Patch) and have had mixed, but unsatisfactory results.
So, I researched on the web for GPS lock solutions, for DHD (In the UK). Based on several findings I have been playing with my settings and have finally achieved a state where I can a really fast lock, with atleast 6-8 average Satellites. Configuration that works for me:
1. gps.conf needs to have correct entries for NTP_SERVER. Best way to locate those entries is to go to http://www.pool.ntp.org/en/, click on 'Active Servers' on the right hand side for your continent, and choose your country. At the top you'll see a set of 3 or 4 servers, and all of those need to be set in gps.conf, as below (UK in my case)
NTP_SERVER = 0.uk.pool.ntp.org
NTP_SERVER = 1.uk.pool.ntp.org
NTP_SERVER = 2.uk.pool.ntp.org
NTP_SERVER = 3.uk.pool.ntp.org
Remember that these should be the only NTP_SERVER entries in the file
2. I found this suggestion in the AGPS Patch (by crypted) and it worked for me. Edit the entry in the build.prop file as below:
ro.ril.def.agps.mode = "1" (Generally this value is set as "0" or "2"
After making the above changes, reboot the phone. Then load the GPSStatus app, and you'll see that it'll start latching onto Satellites, give the app sometime until it gets a stable lock, and you're good to go.
Disclaimer: I'm not an expert, and these are settings that worked for me, based on my limited research.
Now, the only outstanding issue I'm facing is the accuracy of the lock. I had a 100 mile journey today using Copilot, and the lock was absolutely stable, but accuracy was left wanting. Typical issues were encountered when there're roads that go under/over the motorway, parallel roads, slip roads, etc. The Sat Nav kept deviating into these other roads before reverting to the motorway on which I was.
So, the accuracy will be an area where I'll need more research, and suggestions from all ..
Click to expand...
Click to collapse
What the hell dg!!! I leave You alone for a day ore 2 in here and You go of creating a thread about gps!!!!GREAT!!!:good::laugh:
There has been allot of anger on the Jellytime....the usual, when a ROM becomes interested and starts working smoothly. Allot of folks gets on the thread and it becomes a bit uncontrolled.....oh well!
So what is this about neither the one ore the other gps fix/patch works for You my friend.....hmm....i forgot to tell You that way back i implemented some files i found on a thread on the inet......that i cannot remember the name of....5 files.
These files where drawn out of the 2.3.5 gb HTC stock ROM and addresses the HTC gps Worldwide......before applying either the faster gps fix ore the agps patch, i did have gps connection, but very slow, so for my part, what faster fix did, was making the connection faster. Looking at Your above statement, it resembles the code within these files. i could copy them from my phone and You could have a try with them on Your phone.
The gps.spade.so, goldfish and saga goes in /System/lib/hw
The liprpc.so goes in /System/lib
The gps.conf goes in /System/etc
Here is my gps.conf script:
NTP_SERVER=0.europe.pool.ntp.org
NTP_SERVER=1.europe.pool.ntp.org
NTP_SERVER=2.europe.pool.ntp.org
NTP_SERVER=3.europe.pool.ntp.org
XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
INTERMEDIATE_POS=1
C2K_HOST=c2k.pde.com
C2K_PORT=1234
SUPL_HOST=FQDN
SUPL_HOST=supl.google.com
SUPL_PORT=7276
SUPL_SECURE_PORT=7275
SUPL_NO_SECURE_PORT=3425
SUPL_TLS_HOST=FQDN
SUPL_TLS_CERT=/etc/SuplRootCert
SLP_TYPE=FQDN_PHONE
PROTOCOL_TYPE=Non_TLS
PHONE_TYPE=UMTS
ACCURACY_THRES=5000
CURRENT_CARRIER=common
DEFAULT_USER_PLANE=TRUE
REPORT_POSITION_USE_SUPL_REFLOC=1
I Use Europe instead of just Sweden...ore as with You U.K
I have an accuracy of between 4-14 meters out doors and 10-20 meters indoors.....
I have attached 2 .zip with the files. One with the actual files and a .txt with where to put the files, as i already described above.

So this is the only files or just NTP_SERVER entries and leave everything else there?
I'll try Geko's file first. and report back.

hmm, the accuracy, within 100m
but sometime will lost, i think that was the navi app problem.
overall is super awesome and fast.
get statellite & locked within 10seconds
well done man

Hey geko, that's a lot of info.. I will go through the details and try out..
Strangely if I use the Europe NTP servers I don't get more than 1 or 2 SATs but the UK ones work great for me.. that's why fasterfix didn't help.
I guess I was so happy that my research (fueled by your initial help ) worked that I had to share...
Sent from my Desire HD using Tapatalk 2

Remember that some desire hds have a hardware problem where the GPS antenna is not making good contact inside try pushing on your antenna wich is the square cover over the LEDs. if you get an instant lock this is your issue
Sent from my HTC Desire HD using xda app-developers app

Fast GPS FIX
Use this zip and you should get a faster fix on your DHD....
Hit the Thanks Button if i helped you:laugh:

Looks like I've managed to break my GPS Configuration now
I managed to get the GPS working as per the OP (on JellyTime R10.1), but then I flashed Jellytime R12 and my GPS again does not latch any Sats, with the same settings as in the OP.

dg170775 said:
Looks like I've managed to break my GPS Configuration now
I managed to get the GPS working as per the OP (on JellyTime R10.1), but then I flashed Jellytime R12 and my GPS again does not latch any Sats, with the same settings as in the OP.
Click to expand...
Click to collapse
Well....by the looks of it DG, RB has mad some mods on the R12 getting sat stats quicker.....the flip side is that it does not work for Europe....try flashing faster fix and the get into Your gps.conf file and modify to Your settings!!! I am not 100% sure, but i think that this will fix Your connection....
Try.....Try and Try again.....and if that does not help......reflash.....hopefully You have dun an nandroid of Your 10.1......if not....hmm....

Hey I can confirm that the GPS works on R12 without making any changes to any files. RB has cracked it...
But, once you've used GPS based apps, the gps needs to be switched off and on, to get lock again.
But accuracy still an issue..
Sent from my Desire HD using Tapatalk 2

[Q] GPS: lots of sats in sight, none connected.

I've played Ingress for several months. One thing I do daily is recharging 20~30 portals during my commute by bus -- open Ingress after getting on a bus, waiting for the GPS to get fix, and collect XMs and recharge.
However, in the recent one or two months, my phone's not able to get me GPS fix near my home -- even on a square. GPS status shows many sats in yellow, but none becomes green. Rebooting the phone doesn't solve it.
When I get to another place, two or three kms from my home, my phone still can't get fix. What's strange is, if I reboot my phone there, and try GPS again, it usually gets instant fix.
Also, I can always get instant fix anywhere near my working place.
I have two questions:
1. Which of the software parts affects GPS performance? I switched among multiple ROMs during these months, but I should be always on cloudyfa's KK baseband.
2. Anyone else has encountered the situation that you stand on a square on a not-so-cloudy day, with no high building around, 24 sats in sight, but your phone just can't connect to any? Has anyone solved it? How?

Try using faster fix app and change the ntp to your location and see if that helps

danial.aw said:
Try using faster fix app and change the ntp to your location and see if that helps
Click to expand...
Click to collapse
Thanks. That didn't make any difference.

coolcfan said:
Thanks. That didn't make any difference.
Click to expand...
Click to collapse
Download GPS Test from the Play Store, go to the app settings and press Update A-GPS while your data connection is on. Wait a few moments and the app should lock on to GPS satellites. You should be good to go from there.

robogo1982 said:
Download GPS Test from the Play Store, go to the app settings and press Update A-GPS while your data connection is on. Wait a few moments and the app should lock on to GPS satellites. You should be good to go from there.
Click to expand...
Click to collapse
GPS Status from play store also has that A-GPS downloading feature, and that's not helping me either.

If not changed nothing in software that can cause bad reception (build prop edit, rom, ...) try something hardware
Réparer en 5 minutes le GPS LG g2: http://youtu.be/UdDJqFxpRy8

siggey said:
If not changed nothing in software that can cause bad reception (build prop edit, rom, ...) try something hardware
Réparer en 5 minutes le GPS LG g2: http://youtu.be/UdDJqFxpRy8
Click to expand...
Click to collapse
Thank you! Good video. I will try it after having tried all software ways.
Which properties in build.prop affects GPS performance? I'd like to check them first.

Also, try TopNTP app before opening up the phone.

I've been through a few smartphones and running various ROMs on each, here's my observation.
a. If the phone's gps takes long time but eventually locked then those apps mentioned above do help.
b. If the phone's gps take long time and never locked then those apps above are useless, they won't do a thing.
My advice 1: restart the phone and see the gps gets locked reasonable fast, if not
My advice 2: changing ROM. Do focus on firmware first before touching hardware.
Long time means 15' or more.