GPS fix that does NOT require OS upgrade, stay on JWR66N/JSS15J/CM10.2

[sfhub]

I noticed some folks had perfectly functioning tablets except for the GPS issue and were concerned upgrading to JSS15Q might introduce multi-touch or other issues.

They might currently be on JWR66N or JSS15J and just want the GPS fix and nothing else.

I put together a fix that will accomplish just that.

It has been tested on JWR66N and JSS15J.

I will warn you that I've made my best effort to make sure this doesn't cause additional issues, but you always take a risk when making changes to an otherwise working system, although in this case, I consider it small.

If you are already running custom recovery, ignore the instructions below, just flash as any other update.zip

You need your bootloader to be unlocked.

You need to one-time load TWRP (or CWM) into memory but do NOT need to overwrite your existing stock recovery.

You do NOT need to be rooted.

Downloads

• download TWRP custom recovery
  rename to twrp.img and place in your adb (platform-tools) directory
• copy update-GPS-lock-fix.zip to your tablet's virtual sdcard

Within command prompt in your adb (platform-tools) directory

• adb reboot bootloader
• fastboot boot twrp.img

Within TWRP

• install update-GPS-lock-fix.zip
• reboot (do not choose to install SuperSU unless you want it)

 

[OJ in Compton]

I am willing to give it a try in a day or two if you don't get enough people to test this, I'd do it now but I upgraded to JSS15Q already so I'll have to reflash the previous version and I have some assignments to finish first.

Sort of off topic, but as someone who had very good touchscreen response on JSS15J and now has minor issues on JSS15Q, is there any way for me to extract and apply the touchscreen settings from JSS15J update into anything in the future? This is assuming that Google uses the touchscreen settings from JSS15Q in future updates since they appear to consider them a "fix".

Anyway, thanks a lot for creating this patch for us.

 

[sfhub]

I don't know if the touchscreen firmware is flashed onto the tablet by the kernel persistently or loaded everytime it starts, but the touchscreen firmware is contained in the kernel.

Theoretically you may be able to get JSS15J touchscreen behavior by using the JSS15J kernel with your JSS15Q ROM.

However, if the touchscreen firmware is flashed directly into hardware and the versions can only go up, then you are stuck with the JSS15Q touchscreen firmware.

So basically try flashing the JSS15J kernel and see if the touchscreen behavior changes.

 

[chrolmesq]

If my device is rooted, can I just flash it normally?

Sent from my Nexus 7 using XDA Premium 4 mobile app

 

[hyperxguy]

It works

Hello sfhub ...
I'm in a unique situation here. I'm on Slimbean beta3 which is based on JSS15Q and the fixes should be in place. However, something
is lost in translation and the GPS issue is still there. So I applied your fixes and (so far) it appears to fix the GPS issue.
I don't know what you did there, can you explain ? Did you just just pull the google fixes off their release ?
Thanks.

 

[sfhub]

If my device is rooted, can I just flash it normally?

Yes.

 

[sfhub]

Hello sfhub ...
I'm in a unique situation here. I'm on Slimbean beta3 which is based on JSS15Q and the fixes should be in place. However, something
is lost in translation and the GPS issue is still there. So I applied your fixes and (so far) it appears to fix the GPS issue.
I don't know what you did there, can you explain ? Did you just just pull the google fixes off their release ?
Thanks.

I extracted the GPS firmware and made it available to previous releases.

It should theoretically work with any ROM as long as it is based on stock.

 

[Tony_YYZ]

I extracted the GPS firmware and made it available to previous releases.

It should theoretically work with any ROM as long as it is based on stock.

You extracted the GPS firmware from JSS15Q?

 

[sfhub]

Yes.

 

[sfhub]

This fix appears to be working well.

Removed testing from title.

Given that the JSS15Q touchscreen firmware is a one-way street, no going back, there may be more interest in this solution to the GPS issue, especially if your touch screen in working acceptably well on JWR66N or JSS15J.

 

[hyperxguy]

Navigated a couple of long trips today and worked like a charm.
Thanks.
Such a clever idea !

 

[ytymf]

it does work

 

[berardi]

argh, so the fix worked perfectly, GPS finally works for me!! thank you!
But I am getting spammed with "Bluetooth Share has stopped" messages so the system is unusable. I will reflash the original CM, apparently bluetooth is broken by the fix.
Any ideas?

EDIT: False alarm, it had nothing to do with this fix. It was entirely related to a Bluetooth Audio "Fix".

 

[sfhub]

Wow, so we broke the berardi black cloud curse? Something good happened to your Nexii? That is really something!

 

[berardi]

Wow, so we broke the berardi black cloud curse? Something good happened to your Nexii? That is really something!

Yes hahaha finally have a working unit GPS and all.. Thank you very much for the GPS fix!!!

 

[Chasroach]

I rooted my N7 and kept the stock ROM. I ran the OTA update, no problems, and it fixes the GPS issue. Still on JSS15J.

Sent from my Nexus 7 2 FHD Flo (razor)

 

[Muikkuman]

So the GPS issue is a software issue? Not a hardware issue?

Sent from my Nexus 7 using Tapatalk 4

 

[sfhub]

So the GPS issue is a software issue? Not a hardware issue?

For most people their GPS issue can be resolved in firmware (software).

 

[Muikkuman]

For most people their GPS issue can be resolved in firmware (software).

I just tried GPS outside and had 11/20 connected.

Sent from my Nexus 7 using Tapatalk 4

 

[sfhub]

I just tried GPS outside and had 11/20 connected.

Sorry, are you saying you had no GPS issues prior or are you saying you installed the GPS fix and now have no issues?

If latter, to help others, what OS were you running?