Database Develop

[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] Galaxy NOTE SOD problems.

My brother's galaxy note have been facing serious sod problems since he bought the phone at Nov 2012. After he faced it the 1st time , he sent to SC and got it back. After 1-2months the problem came again and he asked for my help. I persume it was because the malaysian firmware of the ICS was somewhat unstable from what i read from forums here and there. So i changed the firmware to JB duno from which country when it came out in MAC. After a week or so. The problem reappeared . So I just decided to root and chnge the kernel and also the ROM. Changed the ROM to a stock rom and a kernel. Still the problem persist. I'm out of options. Went to the ****ty SC and the idiots just factory reset the phone and give u back. BUNCH OF RETAR*S . (sorry for my languange)
Hope someone here may help me out with my problem. Thanks a million :laugh:

Check all the apps you have installed maybe you find the bad one whose causing it as you have mentioned it comes after sometime of installing a fresh rom and have you tried any aosp rom maybe that will fix the issue
Sent from my GT-N7000 using Tapatalk 2

abhinav quietly brilliant said:
Check all the apps you have installed maybe you find the bad one whose causing it as you have mentioned it comes after sometime of installing a fresh rom and have you tried any aosp rom maybe that will fix the issue
Sent from my GT-N7000 using Tapatalk 2
Click to expand...
Click to collapse
I just installed an aosp rom (PA) and I hope it fixes the problem. Well I've seen the amount of apps installed in the note and its jst a quarter the amount I have in the Galaxy S2 and my S2 works like a charm. The note has been giving me headache ever since I got it from my brother. Hope this does solve it , if not I guess its something else maybe hardware

Phone sod twice on paranoid android. FML! Guess im visiting SC tmrw again.

Same problem with me..
My Note 1 has SOD since 1st time bought it..
be patience to install JB --> still SOD
change kernel to SpeedMod 5.3 --> SOD again
change kernel to PhilZ --> sometimes SOD
I have read many information that related with SOD in galnote 1, my opinion it is related with hardware too.. sometimes
or it is related with kernel... it can not wake from deep sleep..
anyone have another better suggestion to cure this ?

if u're using pure stock rom still facing the same problems then definitely is hardware issues！
if ur device still under warranties suggest bring to SC ask them do a thorough check on it n let them know what's going on actually...

Yes, I use stock ROM still has SOD,
so it's hardware issue for sure...
but I will keep the phone for now because sometimes SC doesn't give solution to this..

psywarx said:
Yes, I use stock ROM still has SOD,
so it's hardware issue for sure...
but I will keep the phone for now because sometimes SC doesn't give solution to this..
Click to expand...
Click to collapse
Yeah and they will give your phone back only doing a factory reset lol
Sent from my GT-N7000 using Tapatalk 2

I too get this SOD once a week on my GT-N7000
Phone status when this happens:
stock JB(earlier ICS), non-rooted, data connection, wifi, GPS, bluetooth all disabled. Battery mostly above 80%.
Gmail, Google+, Facebook and all other social n/w apps disabled (yes, i am an oldtimer )
During SOD, if a third party calls my number, he hears it ringing, but my handset is dead as dodo (quite dangerous as the calling person may think i am not answering it)
i used to get this when it was on ICS and still getting it after i upgraded to JB.
Most of the time, SOD occurs during wee hours in morning ( i used battery monitor app that logs battery stats every 10 minutes to check the time when this happens).
Sometimes it occurs when the phone is in my jeans back pocket. phone needs a 10 second press on pwr switch to restart it.
Turning off the "power saver" mode seem to reduce the probability of SOD.
i have taken this phone to SC and they re-flashed the JB.
i told the SC chap that i have already done this and couple of factory resets, but he said that they do "much more" than just re-flashing through kies like calibrating camera, bluetooth )
does anyone in the know, know if this is indeed true ?
Thanks
-mprab

updates...
After 2 days of re-flashing at a samsung authorised service center, i got SoD 2 times in a period of 12 hours.
once last night and second time when i was traveling to office.
Last night i installed some bare-minimum apps back after waiting 2 days for any SoD to happen in "stock" condition.
Well.... i did not pay 30K to use the GNote as just a phone, so installed some basic apps (Battery monitor, Bangalore BMTC, RealCalc, GPS Test, ES File explorer and a first time app StatusLogger)
phone went dead at 1:00 am in morning and as usual there was no wakeup alarm.
phone was warm to touch when it was lying dead. The battery which was 96% at 00:30 AM had gone down to 54% at 7:00 AM.
Status logger did not show any loss of GSM signal which might have resulted in phone transmitting at higher power/hunting for signal etc.
The "radio" seemed working, because when i made a call to the dead phone from my landline, i could hear the phone ring instead of expected "phone is switched off" message i was expecting.
So this has to do with application processor going in some infinite loop.
Uninstalling all apps is NOT an option.
anyone know if we can establish any debug connection to phone and know what the hell CPU is up to in this situation ?
any processor logger that will periodically log all the processes running on phone ?

SOD resolved... not a single one since 6 months.
Hey guys, just wanted to share this info with you, I had SOD's like anything and did all freakingly possible things right from flashing roms to kernels, speed up CPU, banging my head in front of the dumb witted morons at samsung service... to get rid of that pain. What helped me was an app called "WAKELOCK" by darken which is merely 72kb in size but works wonders, not a single SOD after that. What u need to do is.... it has a list of presets that makes sure your cpu stays up. You need to select the preset called "partial wake lock" which is at no. 4, and viola...
It ensures that the CPU is running. No SOD ever after. Also, you need to make it autorun on boot from the options. Yea, it does eat up batter a bit more but its definitely manageable. I still need to charge my note only at night.
Just to be sure, I uninstalled it and guess what, SOD returned. So, do try it, I hope it helps...

[Q] Buggy GPS, am I the only one?

Hey guys, I'm having GPS issues with my phone. Just wondering if anyone else is experiencing the same.
I'm getting a decently long lock time and then afterwards, every 10-15 mins I'm getting a lock loss followed by a little delay then a lock again.
In case it helps, I'm on stock build KTU84P.N910TUVU1ANJ7.
Consequentially, if someone could help me out by giving me the following files from their phone, it'd be really appreciated:
/system/lib/hw/gps.default.so
/system/lib/libloc_core.so
/system/lib/libloc_api_v02.so
/system/lib/libloc_eng.so
/system/etc/gps.conf

Same here.. Across ROMs(NJ7 based ROM and stock NJ7) as well. Did the compass calibration but didn't fix it. Navigation on this phone is pretty terrible since it loses gps every 15 minutes like what you're seeing.. Any suggestions from anyone would be great!

I flashed the new baseband and still am having the issue of a buggy GPS...

I did have initial issues.
But the compass calibration seems to have resolved most of those.
Though yesterday I did lose the gps signal, which I thought was weird.
It was the first time it did that which I can remember.

It's happened to me on all my Note phones. Samsungs gps is less than spectacular.

Ya I'm having the same issue it doesn't matter the ROM still same issue. But think its a Samsung firmware issue. It works for me initially on a trip A to B but seems way back B to A it stops. Didn't have this issue with note 3. Part of my reason for bigger phone is GPS use so this is irritating. If not fixed with lollipop might have to change.
Sent from my SM-N910T using XDA Premium 4 mobile app

My Note 4 is currently completely stock/unrooted NK4, and I've seen the same thing - GPS works for several minutes, dies for about 5 seconds, then comes back. I've also once had GPS fail to lock at all until I rebooted the phone. :-/
Oh, well. It's still way better than my old S3 which had been dropped quite a few times.

I'm not having any gps issues. The new updated maps is doing it for me.
But, on other phones I have installed the faster fix app when having gps issues. It can be acquired in the playstore:

Mi5 gps

Hello guys, wanna ask something
Are you guys experiencing the gps cannot lock, and always "searching for gps"? I tested it outside with google maps and high accuracy settings but still no luck.
Im currently on miui 8 global stable, is there any way to fix this gps issue?

me too and actually lots of people having this gps issue on mi5. I'm looking for solutions to it also.

Try updating again via updater, click the 3 dots on the top right, it will download the whole package, and reboot again. It works for me

I have the developer MIUI 8 6.8.25 and my GPS works perfect.

Can anyone recommend a good free app for GPS testing?

TheGiantSquid said:
Can anyone recommend a good free app for GPS testing?
Click to expand...
Click to collapse
Try 'GPS Status & Toolbox' from the Play store.
+1 on this, I am also having constant issues with my gps, it seems to be pretty random as it would sometimes lock immediately while the other time i have to wait up to 15min.
I am currently on 6.4.27 from xiaomi.eu as it seems to be the one of very few roms where download transfer rate is not an issue.

Doesn't work when plugged in to either of my QC 2 fast chargers (car and home).
Works fine normal slow charger.

I think it's software related regarding the GPS issues in mi5
Because right now I'm on the custom ROM, the latest multirom, the GPS works flawlessly with no issues at all when I'm using google maps to navigate. Meanwhile the latest global stable has a very bad GPS performance, unusable even.
So I guess I'm gonna keep using this multirom instead of the official stable release, and hope that the devs who're responsible for developing the global release finally fix the issue in the next global release :good:

I had gps problem with all v8 miui rom, cannot get gps locked on google maps. when using gps test the fone only see 5 satellites. No fix solution working yet!

Guys,
Couldn't it be that a certain batch of MI5s has been manufactured with a faulty GPS module? I have tested it on countless rom versions both MIUI and AOSP/CM. It is always the same, my Mi5 takes ridiculous 20-30mins to obtain a lock and then loses it every 2-3mins.
The only occasion when GPS was working fine was few days after I've bought the phone and took an 800km trip, it was stable all the time and I was very happy with its performance as it obtained a lock almost instantly. I was on 6.4.27 from xiaomi.eu back then. Problems have started when I was driving back (and I didn't change ROM during that time) but it was nothing compared to what I'm experiencing now, I am under impression that this is getting worse with each day.
I am back on 6.4.27 now and it's not any better.The GPS is unusable in its current state and I'm considering sending my phone to the seller for a replacement.
My phone was manufactured in May 2016 (says the box), it's a 32GB black version, could you guys please let me know when were yours produced so that we can (or can't) establish a common pattern here?
Cheers.
EDIT:
The issue seems resolved with the latest update (6.9.1 from xiaomi.eu). GPS on my Mi5 has been stable for the last 4 days with an average of ~23 satellites detected, it takes around 30s to obtain a fix. That's a huge improvement, keep it up and we might see other issues resolved once and for all

wiadrovit said:
Guys,
Couldn't it be that a certain batch of MI5s has been manufactured with a faulty GPS module? I have tested it on countless rom versions both MIUI and AOSP/CM. It is always the same, my Mi5 takes ridiculous 20-30mins to obtain a lock and then loses it every 2-3mins.
The only occasion when GPS was working fine was few days after I've bought the phone and took an 800km trip, it was stable all the time and I was very happy with its performance as it obtained a lock almost instantly. I was on 6.4.27 from xiaomi.eu back then. Problems have started when I was driving back (and I didn't change ROM during that time) but it was nothing compared to what I'm experiencing now, I am under impression that this is getting worse with each day.
I am back on 6.4.27 now and it's not any better.The GPS is unusable in its current state and I'm considering sending my phone to the seller for a replacement.
My phone was manufactured in May 2016 (says the box), it's a 32GB black version, could you guys please let me know when were yours produced so that we can (or can't) establish a common pattern here?
Cheers.
EDIT:
The issue seems resolved with the latest update (6.9.1 from xiaomi.eu). GPS on my Mi5 has been stable for the last 4 days with an average of ~23 satellites detected, it takes around 30s to obtain a fix. That's a huge improvement, keep it up and we might see other issues resolved once and for all
Click to expand...
Click to collapse
i'm planning to buy a mi5 but first i want to be sure that i won't have gps issues as had with g5!
at first you said that gps was weak either on MIUSI or CM/AOSPA.. that seems to be an HW issue.. so how is it possible to have solved gps issues with a SW update? do you still have rock solid GPS tracking? i need it for sport and gaming purposes

any clue how to fix it?

For me it always flworked outside but i didn't work inside my house only...

kemalafiantoro said:
I think it's software related regarding the GPS issues in mi5
Because right now I'm on the custom ROM, the latest multirom, the GPS works flawlessly with no issues at all when I'm using google maps to navigate. Meanwhile the latest global stable has a very bad GPS performance, unusable even.
So I guess I'm gonna keep using this multirom instead of the official stable release, and hope that the devs who're responsible for developing the global release finally fix the issue in the next global release :good:
Click to expand...
Click to collapse
Its still not fixed....its been 5 months and still not fixed... I still dont understand i spent 350$ on this piece of ****
Someone please help me fix this issue..

Mine has always worked fine. I am always on the latest global dev of miui. What did you try to resolve it?

I've tried different GPS fix in the google store, changed to xiaomi.eu in 2-3 different versions, changed to global developer, wiped everything, edited the gps config, turned off miui battery optimization and granting google maps permisions to all. Nothing seems to fix it, always 15 or less satellites, bad signal and about 2-3mins to lock the position.
Nothing seems to work... Now trying to install 6.11.10 xiaomi.eu and then switch to the latest xiaomi.eu stable as recommended. If I find any solution I'll let you know, but I'm staring to think it's related to hardware, my GF owns another mi5 and 0 problems since the first day.
Edit: Installed 6.11.10 without formating system aaaaand.. nothing changed.
Installed again formating system and 6-10s I get my location for the first time, more GPS showing and seems to work fine.
I'll update again to last xiaomi.eu and test it to see if all keeps working.
For the time being: 6.11.10 xiaomi.eu with format system corrects the GPS error

Because of the unusable and unreliable GPS, my very expensive Mi 5 Pro Ceramics will be sold.
Nothing will ever be fixed for this phone, because​ Xiaomi does not care about a solution.
What is a phone worth that has GPS problems? I paid 370 USD for the 128 GB version.

My GPS has working fine but since 2 months I have the same problem.
I am using a magnetic holder in my car for my MI5.
But without problems until that moment.
Are you usign magnetic holder??? Perhaps that's the problem, but I am not sure.
I will sell my MI5 because i need the GPS for my job.

I don't have GPS issues per se, but when it is connected to the USB for power in the car it doesn't work. The moment I un-plug it the location is fixed and it works as per normal.

Having the sa,e f*** issues
I am having problem with the GPS since I bought the phone...
At the beginning was taking super long to fix the position... sometimes half an hour.
It was working and failing apparentely randomly...
but now... worst!!!! is not working at all. 0 Satelites
The internal test of the GPS fails...
So I think that if I am still on time I will give it back or change it or something!!!!

Terrible GPS Performance

I've noticed lately that my G920T has a terrible time keeping GPS lock. Definitely a pain when I'm trying to use Waze or other GPS apps. It seems to be significantly worse in my car but overall, GPS Status reports that most satellite signal health is bad. I don't have a case on my phone, so I really have no idea what could be the issue. I've tried resetting AGPS to no effect.
I'm currently on XtreStoLite 3.3.1, running Arter's kernel, but I have experienced this issue on other kernels as well.

I've been noticing this too. Especially when driving. It seems to happen most when an app installs/updates in the background. Toggling GPS on and off in quick settings fixes it, but it's inexcusable and impossible to do while driving, when you need it most.

socal87 said:
I've noticed lately that my G920T has a terrible time keeping GPS lock. Definitely a pain when I'm trying to use Waze or other GPS apps. It seems to be significantly worse in my car but overall, GPS Status reports that most satellite signal health is bad. I don't have a case on my phone, so I really have no idea what could be the issue. I've tried resetting AGPS to no effect.
I'm currently on XtreStoLite 3.3.1, running Arter's kernel, but I have experienced this issue on other kernels as well.
Click to expand...
Click to collapse
Are you running greenify? You'd have to toggle doze off... If not download the gps conf files from online and use the appropriate one for your geographic region.

I've experienced similar, as well as some other random stuff that I won't get into here, started about 5 weeks ago. Basically seems to come down to having power saving enabled and maybe screen off (I'm almost always running power save). Francis might be onto something with doze, but it shouldn't be disabling GPS while it's actively running in an app (navigation, fitness trackers, etc) whether PS enabled or screen on or not. I've had this phone since last October, done a few different ROMs, but I'm currently stock (EPF1) with just root, no other mods and have been in that state for several months (because I've been lazy), no updates or anything. Tried removing apps that might have been installed recently at the time, to no avail. No clue what the deal is, but I'm gonna flash some custom ROMs again, which hopefully solves whatever bug issue this is.
Don't think I provided any solution, but wanted to give some input as I had similar issues.

I discovered the problem. I was using Arter97's kernel. Re flashed the kernel that comes with the ROM; GPS works much better.

socal87 said:
I discovered the problem. I was using Arter97's kernel. Re flashed the kernel that comes with the ROM; GPS works much better.
Click to expand...
Click to collapse
So that's what's going on