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JSS15Q replaces JSS15J - Multi-touch, GPS, corrupt eMMC, PRNG addressed, other fixes?

OP sfhub

22nd August 2013, 06:46 AM   |  #1  
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JSS15Q factory images and OTAs available in Downloads section (below)

*WARNING* JSS15Q touchscreen firmware is a one-way street, no going back
*UPDATE* there is now a solution for touchscreen issues below

  • If you just want the GPS fix, see this post.
  • If you have touchscreen issues, see this post.

Apparently the JSS15J got pulled as folks who were on JWR66N and had the notification of the update no longer have the notification showing up. Also the downloaded ota update.zip in their /cache directory is no longer there.

Separately there are reports of a JSS15Q update going out which appears to be alleviating the multi-touch and GPS issues.

Let's discuss/consolidate peoples' experiences with JSS15Q in this thread so we can see what changed, got fixed, or was made worse.

You can see some comments from folks about JSS15Q alleviating Multi-touch and GPS issues at the bottom of these threads on google product forums:
  • Multi-touch - reports of improvement, no improvement, and some worse
  • GPS - reports of mostly completely fixed
  • Random reboots - no real success stories regarding JSS15Q

Initial impressions
For Multi-touch, it appears there are hardware variances which the software needs to account for. Some folks are seeing everything fixed, some people are seeing no change, and some people are seeing new problems introduced. So if you didn't notice issues is JWR66N but started seeing issues in JSS15J, this update will be good for you. If you already saw issues in JWR66N, then this update probably won't do anything for you. More recently there have been some reports of JSS15Q making touchscreen issues worse.

Unscientifically, most people are reporting either multi-touch is fixed or no change and a few are reporting it is worse.

If you continue to have multi-touch/touchscreen issues, see this post for a solution.

The specific change for Multi-Touch was the firmware was updated to A042. See this post for the whole sordid history of our touchscreen firmware.

Our touchscreen is made by Elan Microelectronics. See their Youtube video demonstrating their capabilities using of all things, YAMTT!

For GPS, most people are reporting that their issues with GPS losing lock after a period of time are now resolved completely.

For random reboots, no definitive info on whether there is any improvement.

UserData eMMC corruption seems to have been addressed, see this post.

It appears the PRNG vulnerability is addressed. See this post for more info.

See list of patched areas for places to focus on looking for improvements.
Facelock, GPS, NFC, Sensor, AAC encoding/decoding, and Camera seem to have the most changes.

Change summary:
  • JSS15J(4.3_r2.1)->JSS15Q(4.3_r2.2) AOSP Changelog.
Mini guides:Downloads:
JSS15Q
  • JSS15Q Factory Image (thanks roy827, poisike, Zylograth)
    Source: pure stock - Format: flash in fastboot/bootloader
    Guide: flashing factory images
    Caveats:
    • requires unlocked bootloader
    • options to wipe or preserve user data
  • JWR66N->JSS15Q OTA (thanks Zylograth, Aerys)
    Source: pure stock - Format: flash with stock recovery (adb sideload) or in TWRP/CWM
    Guide: adb sideload
    Caveats:
    • MUST be running unmodified JWR66N
    • If you are rooted with SuperSU, OTA will fail near the end. See this post for explanation/fix.
    • stock recovery does not require unlocked bootloader
    • preserves user data
  • JSS15J->JSS15Q OTA (thanks roy827, poisike, Zylograth)
    Source: pure stock - Format: flash with stock recovery (adb sideload) or in TWRP/CWM
    Guide: adb sideload
    Caveats:
    • MUST be running unmodified JSS15J
    • If you are rooted with SuperSU, OTA will fail near the end. See this post for explanation/fix.
    • stock recovery does not require unlocked bootloader
    • preserves user data
  • JSS15Q repackaged TWRP/CWM-flashable
    Source: slightly modified stock - Format: flash in TWRP/CWM
    Caveats:
    • this is not pure stock and will not work with future OTAs
    • this is rooted, with unsecured kernel, and init.d support
    • odexed and deodexed versions
    • preserves user data
Factory images (direct download)Stock kernel/recoveryRoot/SuperSU
====

Update #1:

Paul Wilcox Google community manager writes:
Hi everyone,

As a couple of you have mentioned, there's a new system update that's started rolling out for your Nexus 7s. This update does address the touchscreen issues discussed in this thread. If you're one of the people experiencing touchscreen issues, please let us know how it's going after you've received and installed the update.
Update #1.1

Paul Wilcox Google community manager writes:
Hi everyone,

Thank you for your patience while we've been working on this. As Justin mentioned, there is a new over-the-air update for Nexus 7 rolling out now that addresses the GPS issue discussed here. We look forward to hearing feedback about your GPS experience after you've received the update.
Update #1.2

Paul Wilcox Google community manager writes:
Hi everyone,

We understand that several of your have received the recent Android 4.3 update but are still experiencing touchscreen issues -- we're looking into it.
Update #3:

If you are rooted with SuperSU, OTA will fail near the end.

See this post for explanation and fix:
http://forum.xda-developers.com/show...9#post44597339

Update #4:

Watched pot never boils.

For those folks constantly clicking check for update hoping it will download, usually in the early days of a rollout there is a process that randomly chooses device id's that will receive the update. If your unit hasn't been chosen, no amount of pressing check for update will get you the update, until you are chosen.

After the initial rollout they turn it on for everyone.

Once the URL is available, you can manually download and install using stock recovery and adb sideload or, if you are more bold, using custom recovery, though IMO it is safest to use stock recovery for OTAs.

Update #7:

First XDA report of JSS15Q factory image resolving multi-touch issues

AnandTech says GPS issues resolved as well.

Some reports of update not helping with multi-touch [andrewNY / phazerorg]
Last edited by sfhub; 21st September 2013 at 06:25 PM.
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22nd August 2013, 07:00 AM   |  #2  
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Quote:
Originally Posted by sfhub

Apparently the JSS15J got pulled as folks who were on JWR66N and had the notification of the update no longer have the notification showing up. Also the downloaded ota update.zip in their /cache directory is no longer there.

Separately there are reports of a JSS15Q update going out which appears to be alleviating the multi-touch issues.

Let's discuss/consolidate peoples' experiences with JSS15Q in this thread so we can see what changed, got fixed, or was made worse.

You can see some comments from folks about JSS15Q alleviating multi-touch issues at the bottom of this thread on google product forums:

http://productforums.google.com/foru...c/9pZO-D_8Y7gJ

Google guy paulw has specifically said JSS15Q alleviates the touch issues

". This update does address the touchscreen issues discussed in this thread. If you're one of the people experiencing touchscreen issues, please let us know how it's going after you've received and installed the update."

Gah and I just unlocked/customed my N7..... guess I gotta wait till the chefs rebase or pull the pin, roll back to stock
22nd August 2013, 07:08 AM   |  #3  
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Thanks, apparently he posted that right after I hit submit

Of course the big question now is how it is working out for people who had the multi-touch issues and whether this does anything to address the gps and random reboot issues.
Last edited by sfhub; 22nd August 2013 at 07:39 AM.
22nd August 2013, 07:10 AM   |  #4  
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Quote:
Originally Posted by wintermute000

Google guy paulw has specifically said JSS15Q alleviates the touch issues

". This update does address the touchscreen issues discussed in this thread. If you're one of the people experiencing touchscreen issues, please let us know how it's going after you've received and installed the update."

Gah and I just unlocked/customed my N7..... guess I gotta wait till the chefs rebase or pull the pin, roll back to stock

Screw stock. Custom is so much better lol.

Sent from my Nexus 7 using xda premium
22nd August 2013, 07:20 AM   |  #5  
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We need someone on XDA to get that OTA ASAP. We definitely need as many people as possible reporting about whether this fixes their N7 issues.

Here's hoping this'll all be good by tomorrow morning!
Last edited by rithvik321; 22nd August 2013 at 07:25 AM. Reason: Fixed a typo
22nd August 2013, 07:23 AM   |  #6  
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Quote:
Originally Posted by blackhand1001

Screw stock. Custom is so much better lol.

Sent from my Nexus 7 using xda premium

Yeah but depends who arrives faster ROFL ROFL

I am very surprised by the lack of stock flashable ZIP roms (I know I can fastboot push the factory image but flashing a zip in CWM/TWRP is easier for the lazy!)
22nd August 2013, 07:26 AM   |  #7  
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Angry flash it someone
I would flash it but running a custom Rom... me wants to know if touch is fixed
22nd August 2013, 07:28 AM   |  #8  
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Quote:
Originally Posted by notoriouspk

I would flash it but running a custom Rom... me wants to know if touch is fixed

Yah thats my problem too, theoretically a ROM based on this new OTA would incorporate the fix but the only way to 'experience' it 100% is to flash it as stock as who knows how the changes interact with the custom ROM changes
22nd August 2013, 07:30 AM   |  #9  
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I'm impatiently waiting to see the OTA notification on my fully stock N7... Here's hoping good things happen!
22nd August 2013, 08:20 AM   |  #10  
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Here's to hoping this fixes the bootloop issue

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