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] GPS Loses fix (and precision) when screen off

Hi people!
On my Galaxy S i9000 I have on Juwe 5.3 (JVR) with Semaphore 1.6.0.
I have the following problem: my GPS works (good accuracy and locking speed) only when the screen is on. As soon as the screen goes off, I lose the fix and precision, while using tracking apps like Runkeeper or My Tracks and diagnostic ones like GPS Status.
I've tried to force the CPU on 1000 MHz with Voltage Control but the problem remains so I'm guessing it's not a performance issue.
Any ideas?
Everything else works fine.
Thanks!

The same happens on my phone (albeit w/ CM7), but I don't mind, since that would eat the battery. I can see how that would render certain apps useless, though. I've used a few ROMs in my day, and never noticed GPS staying locked while the screen was off. I'm interested in how you'd achieve this as well.

Hi.
Yes in fact when I was on stock the gps worked as expected but I was on froyo.
Than I updated to a beta GB and then to Juwe.
I'd prefer not to put a froyo rom just to test if possible. I'll wait for someone to come with some idea
Thanks!

Some updates:
- It seems not to be kernel releated (tried with both semaphore and CF-Root, will try also TalonDEV)
- Not rom releated also (from Juwe JVR to Simplicity JVT, passing thru stock JVT).
Any ideas?
Is there someone whose GPS stays locked even if the screen is off?
Thanks.

Interested as well. Anyone?

Hmm, my gps would always lose lock if i turned off screen (froyo too).. thought that was normal behaviour

i thought that depends on the app. navigon has a setting which says to keep gps on or off when minimised.

oswade said:
i thought that depends on the app. navigon has a setting which says to keep gps on or off when minimised.
Click to expand...
Click to collapse
Probably this is right. Should be app-related.
I used to have a lot of GPS problems, but I solved them connecting GPS for the first time with WiFi on google maps, after that, GPs worked great without wifi being necessary anymore.

gtluis said:
Probably this is right. Should be app-related.
I used to have a lot of GPS problems, but I solved them connecting GPS for the first time with WiFi on google maps, after that, GPs worked great without wifi being necessary anymore.
Click to expand...
Click to collapse
I will try that.
It seems that also other phones are affected by this problem/feature, after the update to Gingerbread.

Little update: the navigation app does not let the screen to turn off to not to lose gps fix.
Sent from my GT-I9000 using XDA App

[Q] Is this a safe setup for my Galaxy S i9000?

Hey everyone
Just a simple question; Is the following setup safe for my galaxy s i9000? What I mean is, will the phone face bootloops and other problems soon?? I am currently using it and the performance is....well lets just say unrealistic. Phone boots up and is ready go in less than 15 seconds. The reason why I am paranoid is because im coming from the stock 2.2 Froyo and the performance gain really is unbelievable.
Setup is:
- Stock XXJVT odex
- Dark Core kernel 4.1 for JVT (It has some lagfix activated or something)
- Adernaline Shot v13
- Current governor (through setCPU): Ondemand -> As recommended by Adernaline Shot thread.

I wouldn't worry to much. The performance gain from Froyo Stock to JVT is really impressive!
I had a pretty similar setup for some time at it was running very well. Some random reboots may occur as with all firmwares (Stock and cutom) I have tried before.
Also, I overclocked it to 1,3Ghz with no loss of stability.
Have fun.

Nice and clean setup. You should not face any problem.

Hello!
Just reporting back on this setup....
The performance really is amazing. Phone runs very fast, apps load and close instantly, no heating issues, browsing is incredible, and not to mention this voodoo sound thing that turned the speakers into boom boxes, and massively improved in-call sound and volume. I haven't had any random bootups yet.
However, the only grudge I have is, and hopefully u guys can help me out, that the GPS signal quality is very lame with Google Maps. Also, Google Maps is VERY laggy, sometimes impossible to use because I can't even scroll around or zoom-in/out because it goes down to like 3 fps. It is just shocking that heavy 3D games can be played for an hour without any stuttering or slowing down, yet Google's own application Google Maps barely runs.
I would really appreciate it if you guys can help me out

GPS problems?. Welcome to SGS world.

cabessius said:
GPS problems?. Welcome to SGS world.
Click to expand...
Click to collapse
Lol ya after doing some searching I found that this is a pretty common problem. However, its not the GPS locking that is bothering me; The Google Maps app itself is VERY laggy, im currently on version 6.0.0 and it is unusable for me. Scrolling around and zooming in/out is like 2 frames per second. Do you know why that would be?

GPS tweak in PimpMyROM app legit or placebo?

As a heavy GPS user for driving navigation and sports tracking, using EndomondoPro, I can't afford to have a broken GPS. When my Exhibit II was unrooted and stock, I had occasional GPS troubles in which the GPS would not lock into a signal and whatever app I was using showed that it was still searching for GPS. This continued when I rooted the phone but kept the ROM otherwise stock. Same when I tried CM10, same with the first Slimbean 4.whatever and then with the latest Slimbean 4.2.2. Most of the time it would work, but sometimes not. I added the app PimpMyROM and tried the tweak that is supposed to improve the GPS, by indicating that I'm in North America and the United States. The app then supposedly downloads a GPS config file.
Upon loading the Nexus ROM, I was sorry to find out that GPS doesn't work at all. So I restored a nandroid of the latest Slimbean ROM. I rebooted, and found out that GPS was not working. The app GPSTest showed a handful of satellites in view and working, but no speed readout (I was walking). EndomondoPro app, which uses GPS to track sports mileage/speed showed the ?Locating message in the lower left of the screen, and would never lock onto the satellites. The GPS icon in the status bar -- the white bullseye -- kept blinking, indicating no lock on the satellites. I rebooted the phone, turned GPS on and off, rebooted again, and it still didn't work.
Then, I tried the tweak for GPS on PimpMyROM, and BOOM! The GPS worked.
Is this coincidence, or proof that there is some benefit to using that PimpMyROM tweak? Can any devloper explain what that tweak does, and why it is necessary and not already built into each of these custom ROMs?
And finally, since GPS is very important to me, does anybody know of a custom ROM that is optimized specifically to give all power and glory to the GPS function of the phone? If so, that might be the custom ROM for me.

I have also wondered about the pimp my rom tweaks. Like how does it give you better camera quality?
Sent from my Nexus 7 using xda app-developers app

It installs bravia engine or something like that which has been debunked before. A lot of tweaks are placebo effects. Its kind of like having a quad core phone. Everyone says its faster but for everyday use not so much. All 4 cores will only kick on when the phone is under a heavy load like running a benchmark. This is why I'll prob get another s3 instead of getting an s4 don't see the point in a quad core phone
Sent from my SGH-T679 using xda premium