Database Develop

[Q] why do we all have so different results for gps?

So there are people on here that get good (not fantastic) performance from there GPS with stock, while others like myself have terrible gps performance with stock. I can't lock on, only 2 satellites in view ext. ect, ect. I even tried all the lbstest changes people recommended and i had no change, while others say its fixed.
When I flashed JH7 from odin one click download I got really good results, locking on after a minute or less down to 10 M and with 9 statalites in view.
but I've read others didn't have the same result as me and nandroided back.
Are we sure we all have the same GPS hardware? why do all of our results vary so much with the same rom on the same hardware.

mattbeau said:
So there are people on here that get good (not fantastic) performance from there GPS with stock, while others like myself have terrible gps performance with stock. I can't lock on, only 2 satellites in view ext. ect, ect. I even tried all the lbstest changes people recommended and i had no change, while others say its fixed.
When I flashed JH7 from odin one click download I got really good results, locking on after a minute or less down to 10 M and with 9 statalites in view.
but I've read others didn't have the same result as me and nandroided back.
Are we sure we all have the same GPS hardware? why do all of our results vary so much with the same rom on the same hardware.
Click to expand...
Click to collapse
It could be that some people master clear, when others haven't. I use SRE and my performance is amazing with the GPS. DG does some tweaks still i believe, and my gps tracks amazingly.
Other than that, I have NO clue why. Maybe people have more trees in the area and get less lock? Only thing I can think of.

thanks for the reply, it turns out that after doing a master reset and reflashing jf6 my gps is running better. I dont know what changed but it is performing the same as jh7 was. I guess back to the drawing board

my gpa worked better stock, and with the overclock kernel and utb. I then used jf7 and sre and I'm thinking about going without sre, or maybe move ap only version.
I didn't try jf7 without sre though so I can't know what it will do. I actually have a feeling that my recent poor performance is nothing but a coincidence though. I'll give it a few days and a road test.
Sent from my SAMSUNG-SGH-I897 using XDA App

Mine works fine with JF6, utb, and lagfix ext4.
Wife's also works fine with JF6 and utb.
We used google navigation on hers yesterday and it worked just fine.

Part of the problem is not everyone is testing GPS the same way. The best test is using the NAV application - and not just on a simple route in the neighborhood. Combination highway and local driving - see if the NAV thinks you are on the street or keeps trying to reroute you. Does it tell you about turns or think you missed them?
Also Track your travels and view it on Google maps - really zoom in and see if you wander through buildings.
I think some of it may have to do with system blocking - more things running in the background may have to dow ith how often the GPS updates.

[Q] No GPS receipt with Kernel SpeedMod K9A

I have installed the Kernel SpeedMod K9A on my Galaxy S.
The GPS receipt is complete down, I think in the beginning with the speed Kernel (i1-2) the GPS receipt was fine.
The LBSTestMode show under „Get position test“
DOE: 1 Azimuth: xxx
System: 11:53:52 on in 2010-11-27
Elapsed (Sat): X.xxx (second)
No Satellites are found.
If I wipe the phone, the receipt is again fine.
Then the LBSTestMode indicates no entry DOE.
If I Recovery my Data back via Restore Mode, the error appears again.
I already try JI6, I followed "xda-developers - View Single Post - GPS still not working after JI6 Update- Please help", I used FasterFix for Europe settings in gps.conf- nothing.
Can anybody help me without: “so, make a wipe”

weird , i also installed K9A and didn't wipe a phone but the GPS work fine.
i use DXJPA.

pepporony said:
weird , i also installed K9A and didn't wipe a phone but the GPS work fine.
i use DXJPA.
Click to expand...
Click to collapse
Like this comment, my GPS works fine using DXJPA+K9.

SpeedMod lagfix and GPS performance.
Old thread but I just found it while searching for information on the issue I will describe below. Maybe this has already been addressed elsewhere and if so I apologize but I could not find info on this anywhere.
It has to do with SpeedMod Kernel, the lagfix options and GPS performance.
I am running on Doc’s 9.6.6 ROM, XFJS5, JPY modem.
Until yesterday I had SpeedMod 13KA with the tweaks (first 4 enabled) and lagfix (first 3 on ext4 the loop ones on ext2; no system conversion and Bind_data=false). My GPS reception was horrible – loooong times to lock and very inaccurate, jumping all around the map, lagging behind and loosing signal easily.
Yesterday I swiched to SpeedMod K13B, I enabled the tweaks and default lagfix but without touching DATA_LOOP, CACHE_LOOP & DBDATA_LOOP settings. These remained “=false”. My GPS performance improved miraculously! Lock in fewer than 10 seconds, accuracy 5-10 meters.
This morning I put data_loop, cache_loop and dbdata_loop on EXT2. GPS performance was terrible again. I used GPS Test and I could only find 1 (one!) satellite in over a minute of waiting under open, clear sky. I then disabled all the LOOPs again (all “=false”), and behold! I could find 7 satellites in less than 10 second, locked on 6 of them in 12 seconds and on the 7th in less than 20 seconds. Accuracy was 5 meters.
Do you know why this happens?

Today I installed the K13E version on my stock Froyo 2.2.1 device and I have the exact same problem:
The GPS device will just find 1 satelite and no fix. I have only replaced the stock kernel (J5) and haven't applied any lag fixes yet.
Does anyone perhaps know of a fix for this? Could anyone maybe explain how and where to set the abovementioned changes?
Many thanks in advance!

Maybe it is hardware related. Try this?
http://forum.xda-developers.com/showthread.php?t=1043034

After I switched to Darkcore kernel my gps works again...
Sent from my GT-I9000 using XDA App

[Q] Once again on the GPS... Crap after JVP - HELP?

So here's the deal, and sorry for posting again on GPS matters... Thing is, my GPS was really good on Juwe's 5.0 JVP with Semaphore.
(Before this I did the usual stuff - GPS bend-the-contact hardware fix, GPS aids, calibrate the compass, even Nexus S binaries - I got really good navigation with JVP)
But now, after JVQ and JVR, it's completely shot to hell. I went through many ROMs with different kernels, but it just doesn't maintain a lock, and when it does (for like 4 seconds...) it's usually with 30 m accuracy ( -> useless).
What's weird is that I usually get 5+ birds, with SNR over 28, usually around 35!!
I'm on Jetpack 3.1 with Semaphore 1.5.0, OCed to 1200 MHz, and UVed ( - really stable and fast, no FC, no reboots).
Can anyone offer some insight? Should I just go back to JVP?
Thanks

Sorry to hear this bud - I'm having the same problems and did same stuff - i.e. hardware "fix" and tried many roms. So many in fact that I have no clue as to what "helped" and what was just pot luck.
GPS on this phone is undoubtedly broken and widely documented as such. I even bought an SGS II and sent that back because of similar problems. Samsung don't give a rat's ass about this issue and it will get "fixed" in their future phones by mere coincidence (they get a decent chipset and/or decent programmer to write quality drivers) rather than any effort on their part. HTC manage outstanding GPS on all their phones in comparison to Samsung. Shame HTC don't do Super AMOLED.

Plantaman said:
So here's the deal, and sorry for posting again on GPS matters... Thing is, my GPS was really good on Juwe's 5.0 JVP with Semaphore.
(Before this I did the usual stuff - GPS bend-the-contact hardware fix, GPS aids, calibrate the compass, even Nexus S binaries - I got really good navigation with JVP)
But now, after JVQ and JVR, it's completely shot to hell. I went through many ROMs with different kernels, but it just doesn't maintain a lock, and when it does (for like 4 seconds...) it's usually with 30 m accuracy ( -> useless).
What's weird is that I usually get 5+ birds, with SNR over 28, usually around 35!!
I'm on Jetpack 3.1 with Semaphore 1.5.0, OCed to 1200 MHz, and UVed ( - really stable and fast, no FC, no reboots).
Can anyone offer some insight? Should I just go back to JVP?
Thanks
Click to expand...
Click to collapse
When I was on samsung roms I found that the GPS in JVP/Q/R was a lot worse than froyo. It only started maintaining the lock during drives when i used hardcore's T22 kernel with KC1 modem (for the 850 band in Canada).

Maybe try a different modem. I've heard that JV1 modem is better for GPS than JVQ, JVR modem. Just flash via ODIN.

Try GPS Status on the Market. There you can download GPS Assistance data...
Calibrate your compass with it and, the thing i've done:
Goto into /root/etc and edit your GPS.conf file to your actual position in this world.
Mine is europe.pool.ntp.org
Sent from my GT-I9000 using XDA Premium App

- the modem has slight impact of gps performance - have not noticed diff betwen jve(jv1) and jvr
- the gps.conf tweaks does not affect gps much
- the firmware itself contains some files that boos significantly gps performance (snr, ttff, birds count) those are few files here and there on system that all together makes gps working ok. that is the case in jvp jvq and jvr - still gps likes to travel own way sometimes (google navigation tested and other apps like my tracks)
DO NOT USE ANY OF THOSE WONDER/PAID APPS FROM MARKET - MORE OR LESS A SCAM TO MAKE YOU PAY THE MONEY FOR APP
if you have problems with gps on jvp/jvq/jvr that means:
- your theme/rom maker screwed up those importnt files
- your firmware instalation is not correct
- you have some hardware issue -> use warranty to replace faulty unit
this is how gps behaves not even under clear sky but at window
http://forum.xda-developers.com/showpost.php?p=16416378&postcount=436

@The BigX: thanks, been doing that since Éclair
@$omator: I always try to flash ROMs and kernels properly (flash stock first, etc), and all the Roms I've been using have been pretty flawless in everything else but the GPS... Thing is, in GPS Status or GPS Test I get pretty good locks, even when driving (SNR over 30 for most of them, even 10 m accuracy).
It just seems like... Google Maps or Navigation don't access the same data or something, and it takes forever for a ****ty lock that lasts 4 seconds and is accurate to 50 m.
Gonna try Aura tomorrow.
Thanks for the help, guys.

was using google navigation as a car navigation, phone 'was' on front windscreen
lock was fast and more or less acurate - with problems on roads with woods around (that was very lol when i enetered the forest fix was going from 5 to 50 meters) - but 99% of time stayed on the road wo problems
it is well known problem with the chip used in sgs1 - same one is used by various devices like apple and htc ones with same ****ty results on all - so most likley the chip is just crap=)

GPS fix on samsung captivate with CM9.1 stable

Hi! I am just new in this forum and I dont know where to go. I was trying to post in this one http://forum.xda-developers.com/showthread.php?t=1493695 but I couldn't because I just recently registered.
I have been reading thru the forum link above. I tried the fix, it worked great when I was not moving. I got a lock on satelites. Minimum of 6 locks in 20 secs and maximum 12 locks in a minute and has an average signal of 28 (used GPS TEST app) but once I drive my car, my phone's gps suddenly starts searching again. Somehow all the satelites that it locked onto while i wasn't moving had low signals when i started moving and only says view and not used. Please help me out on this one. Don't know if it's a hardware problem or firmware. Just need a fix for this. Thank you!

[Q] Slow GPS fix on Xperia V

Has anyone noticed if the time for GPS fix varies by ROM?
I'm not sure if I'm imagining it, but I remember 9.1.A.1.140 being a lot quicker to get a fix than most of the ROMs I've tried recently
CM11 feels quite quick, 1-3 minutes, AOKP never got a fix for me
Lovin's .210 and steveboss deodex .210 takes around 5-10 mins
I've yet to try Carbon or OmniROM
Do the programs requesting the GPS fix make a difference? Google Maps and Endomondo sports seem much quicker in comparison to Ingress to get a fix

You need several minutes to get GPS signal?
Either you're in a building and not under clear sky or sth. is VERY wrong with your device.... under clear sky there shouldn't be ANY problem and a signal within a bunch of seconds. I'm using 4.3 version .210, before that CM 10.2, before that 4.1 stock... no problem at all; my navigation app never needed more than 10 seconds to get my position (in the car).

Yep, last night it took over 15 minutes to get the first fix in an open area, with overcast clouds
I used AndroiTS GPS Test, and it seems to get GLONASS sats, but never uses them. Then after 5-10 min, the normal GPS sats kick in.
I'll try reflashing a wiping again, see if that helps.
Logcat seems full of LocSvc_adapter and LocSvc_eng errors