[Q] GPS-Fix CM 10.1(Android 4.2) for Atrix (Epinter)

[asmaron]

Hey there,

first I have to say - I'm new here - and yes, I have searched for my issue in this forum and elsewhere, but I didn't find a solution. So I decided to register here and ask you experts about helping me to fix my problem:

I'm on Epinters-Rom CM 10.1(Android 4.2) (26/08 Built) and having a problem with a fast GPS-Fix. Always when I use GPS the first time a day it lasts about 5-10Min to get a Sat-Fix. I have done some research about this problem and found this:

In a post on a german forum (I'm from Germany) for Defy Froyo and GPS bug I encountered that there are system files that contain specific configurations for GPS or direct downloading instructions of "ancillary data" (such as A-GPS Data). However, there are no configuration files with the name "location" in Epinters-Rom as they are mentioned in this thread, but I noticed a file in my system folder (system / ect / ) called "gps.config".

Doing more research about this file, I found a post here on XDA in epinters CM10.1 thread from August. Here is mentioned, that Epinters "gps.config" has no entry to an so called "NTP server. He made ​​this entry and now the GPS fix is quick. I didnt really see that Epinter commented this, but a year before, Epinter said (at another Rom) that the NTP server entry is no longer necessary (without further explanation).

Then I remembered (coming from Neutrino-Rom) that Neutrino has had an "GPS-Addon" that was separate flashable - a fix for every single country. So I looked at the the GPS addon of Neutrino (Germany) and behold: When flashing this GPS addon it seems, that just the "gps.config" will be fixed with the following entry for Germany:

NTP_SERVER de.pool.ntp.org
NTP_SERVER = 0.de.pool.ntp.org
NTP_SERVER = 1.de.pool.ntp.org
NTP_SERVER = 2.de.pool.ntp.org
NTP_SERVER = 3.de.pool.ntp.org
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

# DEBUG LEVELS : 0 - none , 1 - Error , 2 - Warning , 3 - Info
# 4 - Debug , 5 - Verbose
DEBUG_LEVEL = 0

# Intermediate position report , 1 = enable , 0 = disable
INTERMEDIATE_POS = 0

# Accuracy threshold for intermediate positions
# Less accurate positions are ignored , 0 for passing all positions
ACCURACY_THRES = 0

# Report supl ref location as position , 1 = enable , 0 = disable
REPORT_POSITION_USE_SUPL_REFLOC = 1

# Wiper ( wifi positioning ), 1 = enable , 0 = disable
ENABLE_WIPER = 1

# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# # # # # AGPS server settings # # # # #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

# FOR SUPL SUPPORT , set the Following Following
SUPL_HOST = supl.google.com
SUPL_PORT = 7276
SUPL_NO_SECURE_PORT = 3425
SUPL_SECURE_PORT = 7275
SUPL_TLS_HOST = FQDN
SUPL_TLS_CERT = / etc / SuplRootCert

# FOR C2K PDE SUPPORT , set the Following Following
C2K_HOST = c2k.pde.com
C2K_PORT = 1234

CURRENT_CARRIER = common
DEFAULT_AGPS_ENABLE = TRUE
DEFAULT_SSL_ENABLE = FALSE

# TRUE for " User Plane " , FALSE for " Control Plane "
DEFAULT_USER_PLANE = TRUE

In comparison to that, Epinters "gps.config" is only:

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

Do you think I could risk simply replace the two files? Or is it better to flash the file of neutrino? Or to edit the file by Epinter right? Or at least nothing at all? I do not even want to fabricate a Brick ...

So you techies from this forum! Can you help me?
Thanks for reading this and sorry for my poor english... its not my native language!

Regards,
Asmaron

PS: The Germany.zip in the appendix contains the files that would be flashed with neutrinos Rom (including the "gps.config"). The other single "gps.config.zip" is that of Epinters Rom. Simply open it in Editor/TextEdit or similar programs and you can see the above entries.

 

[andresrivas]

Hey there,

first I have to say - I'm new here - and yes, I have searched for my issue in this forum and elsewhere, but I didn't find a solution. So I decided to register here and ask you experts about helping me to fix my problem:

I'm on Epinters-Rom CM 10.1(Android 4.2) (26/08 Built) and having a problem with a fast GPS-Fix. Always when I use GPS the first time a day it lasts about 5-10Min to get a Sat-Fix. I have done some research about this problem and found this:

In a post on a german forum (I'm from Germany) for Defy Froyo and GPS bug I encountered that there are system files that contain specific configurations for GPS or direct downloading instructions of "ancillary data" (such as A-GPS Data). However, there are no configuration files with the name "location" in Epinters-Rom as they are mentioned in this thread, but I noticed a file in my system folder (system / ect / ) called "gps.config".

Doing more research about this file, I found a post here on XDA in epinters CM10.1 thread from August. Here is mentioned, that Epinters "gps.config" has no entry to an so called "NTP server. He made ​​this entry and now the GPS fix is quick. I didnt really see that Epinter commented this, but a year before, Epinter said (at another Rom) that the NTP server entry is no longer necessary (without further explanation).

Then I remembered (coming from Neutrino-Rom) that Neutrino has had an "GPS-Addon" that was separate flashable - a fix for every single country. So I looked at the the GPS addon of Neutrino (Germany) and behold: When flashing this GPS addon it seems, that just the "gps.config" will be fixed with the following entry for Germany:

Removed long code

Do you think I could risk simply replace the two files? Or is it better to flash the file of neutrino? Or to edit the file by Epinter right? Or at least nothing at all? I do not even want to fabricate a Brick ...

So you techies from this forum! Can you help me?
Thanks for reading this and sorry for my poor english... its not my native language!

Regards,
Asmaron

PS: The Germany.zip in the appendix contains the files that would be flashed with neutrinos Rom (including the "gps.config"). The other single "gps.config.zip" is that of Epinters Rom. Simply open it in Editor/TextEdit or similar programs and you can see the above entries.

For me, epinter's cm10.1 was the first time gps lock in in about 5 to 10 seconds, even if i was inside my house...

perhaps is better (previous backup) to edit the file and change the ntp servers to match your coutry's pools. then try,..
on cm7 i use an app called gps status to force calibration of the compass and to force inject fresh agps data, which helps a little

 

[asmaron]

perhaps is better (previous backup) to edit the file and change the ntp servers to match your coutry's pools. then try,..
on cm7 i use an app called gps status to force calibration of the compass and to force inject fresh agps data, which helps a little

Hey!
Thanks for replying!
I use the GPS Status App too (and tried many other GPS Apps in market) and resetted agps-data many times an refreshed it. It helps a little but just for the moment and after one day not using GPS the fix lasts really long...

I would try to edit the "gps.conf" file but I use the Atrix as my main device, so I dont wanna brick it... Do you think, that editing this file will not force an brick? And what do you think is the best:
a) Editing Epinters "gps.conf" (of course after backing up the org. file, and everything else),
b) Exchange Epinters file with Neutrinos, or
c) Flashing Neutrinos "Germany.zip"?

Or even an absolute other solution?

Regards,
Asmaron

 

[andresrivas]

Hey!
Thanks for replying!
I use the GPS Status App too (and tried many other GPS Apps in market) and resetted agps-data many times an refreshed it. It helps a little but just for the moment and after one day not using GPS the fix lasts really long...

I would try to edit the "gps.conf" file but I use the Atrix as my main device, so I dont wanna brick it... Do you think, that editing this file will not force an brick? And what do you think is the best:
a) Editing Epinters "gps.conf" (of course after backing up the org. file, and everything else),
b) Exchange Epinters file with Neutrinos, or
c) Flashing Neutrinos "Germany.zip"?

Or even an absolute other solution?

Regards,
Asmaron

Humm.. I edited the file and had no problems, I think edit is the safer option due to Neutrinos' files are for Gingerbread and we don't know what changed in the middle

 

[asmaron]

Humm.. I edited the file and had no problems, I think edit is the safer option due to Neutrinos' files are for Gingerbread and we don't know what changed in the middle

Hmm... yeah thats true... so you have edited the file by yourself? What entries did you add? I thought Epinters settings worked for you?

 

[andresrivas]

Hmm... yeah thats true... so you have edited the file by yourself? What entries did you add? I thought Epinters settings worked for you?

Sorry, that was on Gb, I edited the ntp servers to the ones off my country (Argentina). I was using root explorer at the time, but in cm10 the stock file manager can do it without problems (I used it to edit touchpad.cfg to fix raindrop bug). Only thing is you need to give it access via the app settings (can't remember as I'm back on cm7)

 

[asmaron]

Hey!
Meanwhile I flashed the ROM from "Zn7mkUKzN1r8aCIV" where the flash is working. The fix lasts also very long and wasnt even stable. The entries of the "gps.conf" of "Zn7mkUKzN1r8aCIV" are exactly the same as the ones of epinter. So i tried to edit the "gps.conf":

- Editing the strings from the neutrino file (check OP), had the result that i didnt get a fix in even a half an hour.
- Restoring the "gps.conf" has the result of getting a fix after some minutes but not very stable.
- Now I have a edit of the "gps.conf" with the strings nlabrad mentioned in the post i told you before and the NTP-Server-Entries of Neutrino for germany (without blanks between the "="). Now i get a fix after some minutes that is stable, but the accuracy gets not better than 100 meters (328 feet). It stucks here and gets not better even after more than half an hour having a stable fix. To be exact it gets not better and not even worser. It stucks exactly at 100 meter accuracy.

Now i will test the GPS fix from that is mentioned here and i will report later!

Regards,
Asmaron

 

[asmaron]

Did it!

Hey there!

I did it!

First it didn't work to exchange the "libnmea.so" from Krystian mentioned in the post above using the integrated file explorer. I allways got an Error when editing/copying/deleting the orig. "libnmea.so" in the "system/lib" folder. After that error somtimes GPS didn't work anymore at all (cant start it) or nothing was changed to the accuracy of the GPS. Well I have seen that by exchanging the file you have to set the permissions new (chmod 644) but I wasn't able to change it without getting an error.

So I tried another way: I extracted the Files of Zn7mkUKzN1r8aCIV's ROM and exchanged the "libnmea.so" org. file with the file from Krystian. I also replaced the "gps.conf" with an modified "gps.conf" containing the Neutrinos Strings from the Germany "gps.conf". Than I ziped and signed the modified files with LambOfGods Zip Signer Tool (v1.1) and flashed it (wiped Cache & Dalvik).

And now: Get a GPS-Fix (indoor) in about 45 sec with an accuracy of about 4 meters! YEAH! :victory:

Thanks for helping! Esp. thanks to you andresrivas and of course Zn7mkUKzN1r8aCIV and Krystian and so on!

Regards,
Asmaron

 

[Richy87]

[/COLOR]

Hey there!

I did it!

First it didn't work to exchange the "libnmea.so" from Krystian mentioned in the post above using the integrated file explorer. I allways got an Error when editing/copying/deleting the orig. "libnmea.so" in the "system/lib" folder. After that error somtimes GPS didn't work anymore at all (cant start it) or nothing was changed to the accuracy of the GPS. Well I have seen that by exchanging the file you have to set the permissions new (chmod 644) but I wasn't able to change it without getting an error.

So I tried another way: I extracted the Files of Zn7mkUKzN1r8aCIV's ROM and exchanged the "libnmea.so" org. file with the file from Krystian. I also replaced the "gps.conf" with an modified "gps.conf" containing the Neutrinos Strings from the Germany "gps.conf". Than I ziped and signed the modified files with LambOfGods Zip Signer Tool (v1.1) and flashed it (wiped Cache & Dalvik).

And now: Get a GPS-Fix (indoor) in about 45 sec with an accuracy of about 4 meters! YEAH! :victory:

Thanks for helping! Esp. thanks to you andresrivas and of course Zn7mkUKzN1r8aCIV and Krystian and so on!

Regards,
Asmaron

hI! I'm having hard time to understand exactly what you did to fix GPS accuracy. I'm the guy who asked Zn7mkUKzN1r8aCIV about the bug and I tried to overwrite the libnmea.so but it didn't work.... (I've had to flash again the rom to get back to 100m accuracy) Can you explain in a easier D) way how to fix it? I understand that you made a flashable zip maybe can you share it?

 

[asmaron]

Hey there!

Well what I did exactly is:

1) Downloaded Zn7mkUKzN1r8aCIV's ROM (from 10/10/13) and extract it
2) Downloaded "libnmea.so" from Krystian
3) Replaced Zn7mkUKzN1r8aCIV's original "libnmea.so" in folder "system/lib/" with Krystian's one
4) Edited the "gps.conf" of Zn7mkUKzN1r8aCIV in folder "system/etc/" with the strings of Neutrinos "gps.conf" for germany (!) mentioned above *
5) Ziped and signatured the GPS-modified ROM files with "LambOfGods Zip Signer Tool (v1.1)" mentioned above
6) Wiped Cache & Dalvik - Flashed and GPS worked

I've uploaded my GPS-modified ROM with the german (!) "gps.conf" here:

Based on Zn7mkUKzN1r8aCIV's ROM 10/10/13 wich is based on Epinters ROM with modified GPS files for Germany from Krystian and Neutrino

with
a) "Standard"-Kernel:
CM10.1_Android4.2_GPSmodified.zip - 166.48 MB

b) "Hporch32-"Kernel (when Screen-Tearing occurs):

CM10.1_Android4.2.2_GPSmodified_hporch32.zip - 166.48 MB


I can't edit the "gps.conf" for every single county. Thats to much work. But you can do that on your own! I uploaded the files of Neutrionos "gps.conf"-Tweak here so you can download it and take the strings that you need for your country. In your case, I would do the following:

1) Download my GPS-modified ROM

2) Flash it, reboot and try out GPS - I will not take any responsibility for defects of your hardware! You flash it on your own risk!
2.a) If it works fast, its proofed that Neutrinos Strings in the "gps.conf" has no real effect - you can go to step 8
2.b) If it doesn't work (fast) you go to step 3

3. Download Neutrino GPS-Files and extract them

4. Choose the "gps.conf" that is related to your country (always stored in "system/etc/" folder of the zip-file of your country) and open it with editor

5. Edit the strings in the "gps.conf" on your Atrix (folder "system/etc/" - you will see, there are the german strings) with the ones of your country from the Neutrino File (make sure that there are no blanks between the " = " of each string**)

6. Save your edited "gps.conf" of the folder "system/etc" & check (imperative!) that the rights of the file are set on chmod 644!

7. Reboot and try out GPS

8. (Hopefully) Enjoy!


I hope it works! Looking forward to hear your report!

Regards,
Asmaron

* It is not proofed that this has any effect, but I think so, and now I have a GPS-Fix in almost a half minute.
** The effect of this is also not proofed! What I mean is type e.g.

NTP_SERVER=0.de.pool.ntp.org

instead of

NTP_SERVER = 0.de.pool.ntp.org

 

[asmaron]

Hey! Did it work for you?

If not i have another suggestion:

Download my modified GPS-ROM, flash it (on your own risk), download the app "faster GPS" from playstore, choose your country settings in the app. It will modify the "gps.conf" and will set the NTP-Server settings for your country and region.

Maybe it helps... would be glad if you report here!

Regards,
Asmaron

 

[jeremywh7]

libnmea.ko hack works on ICSROM (and related, I imagine)

[...] Now i will test the GPS fix from that is mentioned here and i will report later!

Regards,
Asmaron

Came across this searching for a fix on my recent ICSROM update. I had to do the same thing when I first root/unlocked to install MROM, so that certainly helped. I noticed that the files sizes were identical, and not to the GB files, as one would expect. Anway, the issue manifested as GPS apps showing 0 accuracy, and WiFi-disabled Google Maps showing 1200m accuracy. After updating the file and chmod, it was showing ~7m accuracy.

 

[jeremywh7]

Yup works a-ok...

[...] After updating the file and chmod, it was showing ~7m accuracy.

I meant '7ft accuracy' above. Anyway, I tested on my way to work this morn; locked at 5ft. I did see a couple times when it lost the lock and jumped around the map, but was brief. And I recall seeing that happen on the GB rom too.