yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy Note I717] dengood1:
I too am experiencing problems with my GPS after upgrading. 30 minute drive this morning locked on 0 of 26 satellites where before the upgrade(with all ROMS) I was always locked on immediately. I flashed and went back to the Goldie from with no luck. I've flashed to r different radios since yesterday with no luck. Going to flash back to Gingerbread tonight to see if that works....if not, I'm calling AT&T. Grrrrrr!!!
[AT&T Samsung Galaxy Note I717] mredraider:
Please keep us posted.
[AT&T Samsung Galaxy Note I717] bigmout:
I had the same thought (got a lock once or twice after forcing GPS Status to update AGPS data) but have since concluded it was just a coincidence.

On that note, I noticed something weird while watching GPS Status do its thing. It struggled to get a fix on 20 satellites for 10 minutes. Then, suddenly, the number of satellites went to zero and it looked almost like the GPS was resetting or something. That was followed by a successful GPS fix in seconds. Another coincidence?

Finally, could the problem have something to do with the phone going into deep sleep? That might explain why it stops working after a long period.
[AT&T Samsung Galaxy Note I717] mastaofdacat:
Someone update us if recover back to stock Gingerbread fixes the GPS problem ! that's what I'm planning on doing if it works.
[AT&T Samsung Galaxy Note I717] bigmout:
Was poking around XDA and looks like deep sleep is indeed the culprit for our GPS woes:

And that makes sense when you think about it. There were some reports of a deep sleep bug in ICS. Perhaps they fixed that at the expense of messing up the GPS.
[AT&T Samsung Galaxy Note I717] Dynablue:
Coming from a captivate the note has been a huge step up in gps reliability. I have noticed that i get fewer sat locks on ics but not bad. I tested gps hard when i first got the phone just because of my past experience. Would get 20 of 20 locks all the time..now it is more like 14 of 20 regularly..still good and 10' locks but a reduction none the less.
[AT&T Samsung Galaxy Note I717] dacho:
Well, I just went to the at&t store they tested it and confirmed that it could not get a lock. Then a guy that was doing the testing put his sim in my phone and it got lock almost instantly. He concluded that the sim might be not working properly and he replaced it. Sure enough, with new sim it got instant lock even in the building. So I was like alright that seems to work to me, right after I went to buy something at another store and on my way back it went back to the same old 1.5 km radius and no lock. I went back at&t store and they just replaced it for me. New one works fine but is on gingerbread, so did my old note when it was on gingerbread. I am still waiting for battery to charge so I can flash ICS. I'll report back once I flash but what I found strange is that once he put a new sim card it would get almost instant lock in the building from cold boot. Now I'm even more confused.
[AT&T Samsung Galaxy Note I717] bigmout:
Simple. To put in the new SIM, you have to reset the phone. Every time you reset the phone, the GPS works fine until the phone goes into deep sleep.

I'm telling you all, deep sleep is the culprit. It was a known bug on ICS, and whatever they did to fix it messes with the GPS.
[AT&T Samsung Galaxy Note I717] dacho:
That somewhat makes sense, but after he replaced sim I did reboot and tried it right away and it still would not get a lock. So I'm not sure what it could be.
[AT&T Samsung Galaxy Note I717] bigmout:
D'oh! But do me a favor and try it now after rebooting. Works every time for me.

EDIT: Oops, I just realized you're back on Gingerbread. Still, I just tried it on my phone, and it worked like I described. When you do upgrade to ICS, if you're still having the problem, try rebooting and see what happens. Should solve the problem until you go back into deep sleep.
[AT&T Samsung Galaxy Note I717] dacho:
I tried that on my original note but it would still not get a lock. It was on official ICS.
[AT&T Samsung Galaxy Note I717] dacho:
If it doesn't get fixed I just might go back to my galaxy nexus and sell the note. After using nexus today I realized how much of a better user experience it has over note. I only wish it had bigger screen.
[AT&T Samsung Galaxy Note I717] bigmout:
I know. I'm asking you to try again if you have the same problem on your new phone. I'm pretty sure deep sleep is the problem for most people even if it didn't explain your original Note's performance.
[AT&T Samsung Galaxy Note I717] mutantblack:
Took me 10 sec to lock. I am using flap Rom UCLF6
[AT&T Samsung Galaxy Note I717] dacho:
Yep, I'll report back once I flash it.
[AT&T Samsung Galaxy Note I717] mtucker:
I'm running the same ROM. Sometimes fast lock, sometimes no lock.

At one time (on the UCLE2 FJ ROM), rebooting seemed to fix GPS getting a lock, but then one day I rebooted twice and couldn't get a lock right after rebooting. I will have to try rebooting on the FJ UCLF6.

I did some searching on XDA for GPS fixes. There seems to be quite a few things to try including flashable zips, but I haven't read up enough on any one of them to feel comfortable trying one.

Here are a few threads I am going to check out more to see if they are suitable "fixes".

http://xdaforums.com/showthread.php?t=1550327

http://xdaforums.com/showthread.php?t=1747943

http://xdaforums.com/showthread.php?p=22455870#post22455870
[AT&T Samsung Galaxy Note I717] StarLog:
http://xdaforums.com/showthread.php?t=1239713

The above may help.

Edit nope did not help
[AT&T Samsung Galaxy Note I717] knoshann:
Works great now and worked great before
[AT&T Samsung Galaxy Note I717] dengood1:
I flashed the following gps zip below and within a minute I had 10 satellites locked in within 10 feet. This fix appears to have worked folks!:good::good::good: Flash away:-)

http://dl.dropbox.com/u/17383148/GPS_mod(8NTP).zip
[AT&T Samsung Galaxy Note I717] bluetoothless:
First Note had flawless GPS for 94 days before I hard-bricked it. This includes GB through every leak and many custom ROMs based all the way to F5. Got new replacement from Costco and installed F6 through Kies right away and was sorely disappointed in GPS. Main reason I got the Note was for its size and access to 59 satellites for boating and travel. Took it back thinking it was hardware and third one just as bad. GPS Test Plus sees 24 birds and uses 10-12 with accuracy to 10ft which is great. Google Maps bounces and lags behind. Turned off Google's use of wi-fi and cellular and Maps is much better, but still nowhere near first Note. Seems like hardware and software having tug of war on F6. FWIW!
[AT&T Samsung Galaxy Note I717] StarLog:
So what are the process to flash this, use Odin or ?
[AT&T Samsung Galaxy Note I717] bd11goal:
You probably do not even have to flash that if you are rooted. That simply is another gps.conf file which contains the gps configuration. The primary difference in that "fixed" file is extra ntp servers. I noticed that the stock ICS gps.conf has many of the continental ntp server pools commented out. Simply uncommenting out the appropriate ntp server pool might help. ntp stands for network time protocol and helps network connected devices synchronize their clocks. Until now I figured that the clock synced via cell network and the gps would use that. Maybe it has its own clock?

There may be other differences in the configs but I can't see how uncommenting ntp servers would hurt.
[AT&T Samsung Galaxy Note I717] mtucker:
It looks like the zip file came from this thread. http://xdaforums.com/showthread.php?t=1493695 The full directions are there.
[AT&T Samsung Galaxy Note I717] Radukk:
Now I'm on CM9 Nightly and GPS works ridiculously perfect. I can tell something in Sammy's ROM not favored to my hardware, not modem related.
[AT&T Samsung Galaxy Note I717] edpsx:
Im trying that zip file to see if it helps or not. Is there a way I can put my phone in deep sleep to see if it works after? Or is that just after X hours when it kicks in of doing nothing?
[AT&T Samsung Galaxy Note I717] EvoXOhio:
Weird. GPS is perfect for me in official ics from Samsung/att but on cm nightly its barely usable. Worked fine on cm kangs so issue is probably in cm custom kernel.
[AT&T Samsung Galaxy Note I717] bigmout:
It should go into deep sleep in minutes, rather than hours. Just turn off the screen and give it about 10-20 minutes. That's usually long enough to "break" the GPS for me. You can confirm you're going into deep sleep with an app called CPU Spy.
[AT&T Samsung Galaxy Note I717] kiltedthrower:
I've had to strangely use my GPS a lot the last few days. During one trip I lost lock for a few seconds twice. Other than that, it's been flawless. I've been on stock or on Flapjaxxx´s ROM since having the phone.
[AT&T Samsung Galaxy Note I717] edpsx:
Im back on GB for the heck of it to see if it fixes my GPS issue. CM9 Nightly didnt help it any at all. So Ive done a total factory reset to see what happens for testing purposes. One of these days I wont be changing roms and have a fun that just works! lol
[AT&T Samsung Galaxy Note I717] roadster92:
I agreed with you. Have the same issue. It's seem like Deep Sleep is the problem.
[AT&T Samsung Galaxy Note I717] Mad383Max:
I am not so sure it is deep sleep related. Was working fine again this morning. Phone has been in deep sleep since this morning just got the attached. Usually this time of day i have lost gps. I did boot into recovery last night and wiped dalvic and caches plus fixed permissions and so far so good.
[AT&T Samsung Galaxy Note I717] Radukk:
I think Samsung has changed their chipset/board/antenna design after few weeks from launching and it makes this conflict. I bought Note at launching date and GPS working great at stock GB and LE2 leak, and CM9 Nightly. But somehow LF5 leak, official LF6 and CM9 Kang dose not favored to my hardware (yes must be kernel problem). Some people have same problem likes me and most others vies versa.

At least I can use this problem as future refurbish exchange claim reason, but current state is problematic.
[AT&T Samsung Galaxy Note I717] StarLog:
OK, well I just unzipped it and used ES to move the file in place. Must have had a brain fart, not remembering how to install it.

Sad, it seems to still be reacting the same. I will drive a bit on Sturday, so will re-test.
[AT&T Samsung Galaxy Note I717] vizographic:
Budco2000. posted this solution in his gps solution thread:

"After many weeks of GPS not locking, or taking 5 plus minutes to lock on the recent leaked AT&T ICS ROM's I have found the problem. Not everybody has a problem, but many of you do.

No matter what I did, GPS simply wouldn't work. Flashing back to stock, re-flashing several ICS ROM's with complete wipes of the phone including EMMC and SD card did nothing. The last AT&T leak, as well as the official did nothing to fix the problem. As soon as I flashed back to sauROM or any gingerbread ROM, GPS would start working perfect, with 6 second lock, but back to ICS and GPS would quit again. Last week I finally found and fixed the problem. I flashed the radio from the gingerbread bread ROM on several ICS ROM's including the new official, and it's worked perfect for the last week. The UCLF5 leak and the New official AT&T ROM. I'm running Flapjaxxx ROM with no issues. GPS locks in under 10 seconds, LTE here in Tampa, FL signal strength is the same as is LTE giving me 21MB down and 12MB up, on this UCLA1 radio. Just because it's an older radio, doesn't mean performance is effected.

Flash with Odin (I'm using v1.85) Don't unzip/extract and place it in the phone space, NOT PDA

Make sure phone is in download mode and you have the samsung USB drivers installed."

Has anyone here tried this yet?

Budco2000 clearly had great results using his fix and besides being easy to try, it seems to make sense.
[AT&T Samsung Galaxy Note I717] Dynablue:
Tried it and very limited testing seemed better. More satellites in use, have now shifted back and forth using navigation, maps and GPS test for twenty iterations and never waited longer than a five count to get locks. Will drive test it tomorrow after phone gets a chance to hit sleep.
[AT&T Samsung Galaxy Note I717] rajendra82:
I too think it it's the LF5 and LF6 modems that are the issue here, because of two sets of anecdotes. People in this thread have indicated that the erratic GPS acquired after flashing the last ICS leak or the latest official update does not go away after flashing back to GB ROM. Many of these ROMs do not flash a new modem, so it stays. CM9 recently switched to using the LF6 modem, and people in the CM9 nightly thread have started complaining about bad GPS too.

As an experiment, I have flashed the LE2 modem, which I remember as having decent GPS behavior, over an otherwise mostly stock LF6 install. I had to clear cache partition and Dalvik cache in recovery before I could lock on to anything. Since then the GPS locking on seems more consistent than under pure LF6 with the limited amount of testing I've done. Will need several more days of testing before I can confirm this, because LF6 had some good looks at times too.
[AT&T Samsung Galaxy Note I717] romeojunior:
Wish I had the same experience. Worked great before, works very inconsistently after UCLF6. Hopefully we get a fix.
[AT&T Samsung Galaxy Note I717] tkbryant:
Yeah this has been pretty frustrating. I have the stock AT&T Galaxy Note and after the "official" update to 4.0.4 I too have been having GPS issues. Once it obtains lock , it's fine but the moment I shut it off it takes forever for it to obtain lock again. I reset the phone, unplugged the SIM, took out the battery etc. Nothing has seem to work. The GPS worked perfectly with the stock Gingerbread before. I contacted Amazon about a replacement and I am waiting to hear back from them.
[AT&T Samsung Galaxy Note I717] Tx Redneck:
While I'm not glad others are having these issues, and glad to see that I'm not the only one. I've yet to try the gb modem, but will as soon as I get back home.

I spent two hours on the phone with AT&Greed earlier this week, but was able to convince them to give me a replacement. For giggles though, I'll try the gb modem before touching the "new" one and report back.

Tx

Saved and Texan by the Grace of God, Redneck by choice.
[AT&T Samsung Galaxy Note I717] Tx Redneck:
Confirmed! The UCLE2 modem corrects the Gps issue(s) on ics.

Saved and Texan by the Grace of God, Redneck by choice.
[AT&T Samsung Galaxy Note I717] rajendra82:
After a few hours with the LE2 modem I see no difference in consistency in GPS locks. Reverted back to LF6 modem for now. The problem must be elsewhere.
[AT&T Samsung Galaxy Note I717] Tx Redneck:
The you're one of the lucky folks who weren't affected.
[AT&T Samsung Galaxy Note I717] rajendra82:
I am affected alright. The GPS is more inconsistent right now under LF6. Sadly the flashing of a new modem is not a solution. It is still inconsistent after that as well.
[AT&T Samsung Galaxy Note I717] Dynablue:
I've been using the UCLA modem all day and my Note is back to near instalocks. Tried it on the freeway for grins and it locked before the Nav screen had even fully displayed the map. Before this I did the exact same thing at the exact same point in my trip and it failed to lock for 10 miles. Once it had gotten lock it was very accurate, but 10 miles later, seriously?? So for me, the older modem seems to have worked well. Phone still gets high speed data, phone calls are clear and I'm happy for now.
[AT&T Samsung Galaxy Note I717] rgp1236:
Yes. Going back to GB does fix it
[AT&T Samsung Galaxy Note I717] Mad383Max:
When i was on the leaked f6 i didn't have the problem, as i had posted earlier in this thread. Started having the inconsistency after flashing the at&t official release.
[AT&T Samsung Galaxy Note I717] rsfinsrq:
Ok, so I contacted Samsung and complained about GPS performance after ICS update. I travel every week to a different city and really depend on navigation. I had to first go through online support who sent me generic "make sure all GPS location services are checked" replys along with explanations about how it works. Finally they directed me to tech services who told me they would not replace my device, but have it sent to a repair facility to be re-flashed. I didn't want to send it in and be without so they directed me to A tee and tee. Contacted them and they first walked me through the "make sure all GPS location services options are checked" routine. After explaining the issue again and again, and having me perform a factory reset, they agreed to replace my phone. I didn't want a refurb but they told me that was all they could do for my situation. I told them I would use it for a week and if the issue persisted, I would return their refurb and keep my original phone. The rep told me when I receive the replacement, it would be running GB and not to update it as the manufacturer has identified an issue and will be releasing an update fix. I told them to keep the replacement for now and I'll just wait for the update fix. Not sure if they were just blowing smoke at me or not or if there may actually be a solution for this issue coming down the road. They also told me to keep checking the manufacturers support website for info to be released. Keeping my fingers crossed.
[AT&T Samsung Galaxy Note I717] skeltonh:
As soon as I got my note, it was the same day as the ICS release. One of the first things I tested was the GPS. Major difference compared ot my Sony Xperia Play. Maybe you guys are use to somthing slightly slower, but my Play could take two minutes easy to lock, unless I had WiFi on and I was home. No problems with the Note.

No problem with GPS here....

Did get confirmation that Note is to get JB. I guess that is why they gave me the Note - to insure that I would not get screwed over like they did with the Play. I enjoy ICS. Some things a bit quirky. Compared to my other Android devices - exceptionally nice.
[AT&T Samsung Galaxy Note I717] bigmout:
We're used to what the phone used to deliver before ICS: an accurate fix in seconds.
[AT&T Samsung Galaxy Note I717] devonblue4u:
running F/J LF6. GB gps lock near instantaneous, as well as Noid Droid 4.0.4. This one is consistently searching for your location even in a clear blue sky on Navigon, Google Maps & Sygic.
[AT&T Samsung Galaxy Note I717] nickleboy:
I was having some issues with my GPS as well where I was waiting around 5 to 10mins for a lock. I had recently installed the UCLF6 Base Rom which I really love the smoothness and speed that it has. Tried a few modems (UCLF5 Modem Download, UCLE2 Modem Download) but those didn't work until I tried this one (A01_ATT_Modem_CWM_CLA1) and now I am connecting within seconds again. Only thing is I read from other members that the modem tends to make the Note run hotter. I have a thick case like an outterbox on my Note so I hadn't noticed but I will have to do some long distance testing of the GPS and the Note to see just how hot it gets.
[AT&T Samsung Galaxy Note I717] GrimmSh0t:
GPS Tests GB / ICS (UCLF1/UCLF6)

Not sure if this helps anyone just thought I would add a few tests. Each test was conducted outside with clear skies in the Dallas / Fort Worth area. I did not modify the GPS.CONF (default file).

Observations:

-	Saw a big difference in lock times on GB (UCLF6/UCLF1)

-	GB with UCLF1 had the best lock and satellites performance

-	When on the Black Star IV (UCLF1/UCLF6) SNR is higher on UCLF1

-	When on the Black Star IV UCLF1 satellite lock was 2 seconds quicker than UCLF6

Test 1: (GB / UCLF6)

-	Install GB (Gingerbread)

-	Update applications from Google Play

-	Wait a few minutes

-	Test GPS outside with GPS test

Results = Slow GPS lock / Time – 1:34

Test 2: (GB / UCLF1) – Coming from Test 1

-	Flashed UCLF1 Modem

-	Wipe cache partition / Wipe Dalvik Cache

-	Wait a few minutes

-	Test GPS outside with GPS test

Results = Fast GPS lock & Picked Up More Satellites / Time – .04

Test 3: (BLACK★STAR IV / UCLF6) – Coming from Test 2

-	Flashed Black Star IV ROM

-	Wipe cache partition / Wipe Dalvik Cache

-	Update applications from Google Play

-	Wait a few minutes

-	Test GPS outside with GPS test

Results = Fast GPS lock / Time – .04

Test 4: (BLACK★STAR IV / UCLF1) – Coming from Test 3

-	Flashed UCLF1 Modem

-	Wipe cache partition / Wipe Dalvik Cache

-	Wait a few minutes

-	Test GPS outside with GPS test

Results = Fast GPS lock / Time – .02
[AT&T Samsung Galaxy Note I717] khaytsus:
Note that you aren't even locked here.

Also, Android doesn't store various GPS data in cache etc, it's as far as I can tell in a database, so you'd have to wipe data between tests to make sure you're not just using previous aGPS data each time.
[AT&T Samsung Galaxy Note I717] GrimmSh0t:
- Thanks for the information on where the cache is for the aGPS. I looked through my screen shots and found this one, I guess the previous one was just taken at the wrong time. Either way I started to take screenshot and notes so I remember what I've done.
[AT&T Samsung Galaxy Note I717] rgp1236:
I have tried the various modems, various ICS roms, conf files, and still have issues with GPS. Today I today I turned gps off after reaching work. I rely on it heavily for traffic since I drive LBJ in Dallas. After leaving the building at 4, I enabled GPS, and the fix was fine. Secur trackin all the way home. It does appear that the problem is accentuated by deep sleep. I am currenty running stock with a modified conf file to point to the North American pool.
[AT&T Samsung Galaxy Note I717] jc2464:
I have similar symptoms on the official ICS, and requested a replacement. With a GB and ICS note side by side, I've done a bit of (non-technical) comparison testing using GPS Test.

Always observed:

When the ICS note won't lock on, the constellation map of satellites in view is completely wrong (way different from the GB note that has a lock)

When clearing the AGPS on the ICS note (up to 10 times), the constellation map will eventually refresh to match the GB phone map

When the ICS note has a constellation map that matches the GB note, the GPS lock is always instantaneous

Even with a lock on ICS, it struggles with GLONASS satellites, often only locking on 2 of 8 visible

Total purported visible satellites are identical across both phones

Sometimes observed:

Often the ICS note seems to ignore AGPS clear cache command. The incorrect map keeps blinking in, though after enough tries it actually will clear the cache.

When the ICS note has a lock, sometimes GPS will freeze up completely

(Hocus pocus?) Seems like the ICS phone's GPS has a better chance of locking on in the afternoon, whatever that means.

I haven't tried the gps.conf NTP fix, so I guess the GPS clock could have something to do with it? Could the AGPS actually be right, but the GPS is using a totally wrong time?

Being a total GPS noob, I have no idea what these symptoms mean, other than the fact that it smells like a low level software bug. :confused:
[AT&T Samsung Galaxy Note I717] colonels:
i have noticed this same thing using the free GPS TEST app

clearing AGPS data usually fixes it but in the rare occasions it doesn't i have to press the clear button again up to 10 times always checking to see if it acquires after each clearing
[AT&T Samsung Galaxy Note I717] StarLog:
Anyone know what the code is for the GPS settings? I have started to shut down the GPS until I need it. Seems to work.
[AT&T Samsung Galaxy Note I717] jc2464:
I think you can't access that menu unless you install a LBS Test mod.

As an update, I tried upgrading my replacement to ICS and the GPS problems are identical to my first note (totally wrong constellation map, and being unable to lock to any GLONASS satellites).

I also called Samsung "advanced" technical support, and they said they've never heard of this problem before, though they agree it's related to the upgrade. They offered to have it sent in and debugged, but that's 2 weeks without a phone... In any case, I guess a few more calls to them for the sake of expanding awareness won't hurt 1-800-726-7864 :D