yashsingh1/xdaforums huggingface dataset:
[Nexus 7 (2013) Q&A] bobafuzz:
I can't seem to replicate the multitouch issue with YAMTT now. Undervolted 12.5 at a time all the way until 125, I don't see any issue with it in YAMTT. I noticed in game it does get worse after -50 or so, maybe it only happens when system is underload?
[Nexus 7 (2013) Q&A] bckrupps:
Got a full charge of use out of it and still going fine
[Nexus 7 (2013) Q&A] cyberprodigy:
I didn't notice any.
[Nexus 7 (2013) Q&A] MattDN93:
Not sure if this has been posted but I found this in the original Nexus 7 thread when they were moving to new JB binaries last year (http://xdaforums.com/showthread.php?p=32648920&highlight=erratic+multitouch#post32648920):

Which implies the issues we're having could be software-related with the JSS15J build after all. The guys returning their N7's maybe got devices which had slightly better calibrated voltages in the kernel or something. I'm trying to cheer myself up because I ordered this from Amazon to South Africa, I don't want to return it because everything else is peachy.
[Nexus 7 (2013) Q&A] texnnyc:
Or if it is indeed a voltage issue (I've seen that myself on PCs that had a PSU that was undervolting on the 3.3 rails) - perhaps replacing the back and installing a heftier battery would do the trick.
[Nexus 7 (2013) Q&A] aimfire72:
That's when you take it back to Best Buy ;)

Sent from my Nexus 4
[Nexus 7 (2013) Q&A] sfhub:
I would like to stress that I proposed voltage to the touchscreen digitizer as a theory, not a known fact.

Having said that, I don't know if undervolting the CPU will directly affect the touchscreen voltage. Similarly overvolting the CPU may not either.

There could be some residual affect in slightly changing the CPU voltage but it probably isn't a direct relationship. The CPU is provided by Qualcomm. The digitizer is provided by Asus according to the binaries released by Google so these were 2 different components integrated onto the board. Thuse there might be some other control for the voltage to the touchscreen digitizer independent of CPU.
[Nexus 7 (2013) Q&A] Coronado is dead:
Huh. On a fake leather notebook on one hand the touchscreen is fine. On that same book on the couch the issue arrives again. So the current goes through the fake leather. Heck, even through then fake leather and my shorts!
[Nexus 7 (2013) Q&A] sfhub:
Be careful, you risk permanent damage :)
[Nexus 7 (2013) Q&A] cyberprodigy:
Just did some tests on my 2012 Nexus 7 and they still exist to an extent. When the 2012 Nexus 7 is on a table and not in your hands, it is about as buggy as the 2013 Nexus 7 in your hands. When the 2012 Nexus 7 is in your hands, there are very little to no touch screen issues. Not sure if this helps.
[Nexus 7 (2013) Q&A] freeza:
Have the same problem and it is highly annoying as ****.

This tablet has given me nothing but problems. Why would Google continue to use ASUS as a nexus OEM? They clearly have no clue how to build a properly working tablet.
[Nexus 7 (2013) Q&A] shawnaye:
Oh? The 2012 one had this issue as well?

Cause Asus is relatively cheap. What manufacturer can give you such a cheap yet good tablet? :what:
[Nexus 7 (2013) Q&A] cyberprodigy:
From my tests it did but not when you hold it in your hands.

---------- Post added at 11:45 PM ---------- Previous post was at 11:28 PM ----------

Just did another test.

There seems to be very, very little multi-touch issues when the tablet is plugged in and on a flat surface. I think someone else has reported this, but I guess I'm just confirming.
[Nexus 7 (2013) Q&A] michaelg1030:
Forgive me if this has already been mentioned, I was following this thread up to page 34, but stopped since I do not have touch issues (except for when I am not physically holding it).

So I did a search for touchscreen grounding issues and this is not a new thing. Many search results come up aboit various phones with this issue.

With that said, I found this http://www.androidpolice.com/2011/0...ing-touchscreen-issues-heres-a-potential-fix/

Someone may want to pull the cover off and see of either of those things fix the problem.
[Nexus 7 (2013) Q&A] cyberprodigy:
Yeah sorry. I'm not pulling the back off of my tablet unless it was meant to come of which it obviously isn't.
[Nexus 7 (2013) Q&A] michaelg1030:
Capacitative screens need to be grounded..... http://engineering.mit.edu/live/news/1439-how-do-touchsensitive-screens-work

---------- Post added at 12:06 AM ---------- Previous post was at 12:04 AM ----------

Fine by me, just trying to give some more insight. Like I said I do not have these issues, but I am curious and the more I research the more it sounds like a grounding issue...... I'm sure someone is willing to remove their cover.

And not sure what you mean by not meant to come off. It kind of is meant to come off, sure its like like a battery door, but it unclips with relative ease according to ifixit.
[Nexus 7 (2013) Q&A] cyberprodigy:
Yeah unless someone provides some kind of video tutorial and many people say it works then I am just going to be patient and hope that by some miracle a simple software upgrade can fix this.
[Nexus 7 (2013) Q&A] michaelg1030:
A simple solution like a software update would be nice, but highly unlikely that is the issue given the inconsistency among tablets. Sounds like hardware/build quality to me.
[Nexus 7 (2013) Q&A] sfhub:
It may be tomato, tomahto, but I consider that connected to the ground plane, which is relative to the battery.

If it actually depended on me being the physical ground while touching the case how could that design work when

1) the tablet is on a table

2) I'm wearing rubber shoes
[Nexus 7 (2013) Q&A] aimfire72:
Ok guys, got my 4th N7 32gb today and so far so good - no dead pixels, no light bleed, and no multitouch issues, even on a flat service. I can't believe it! And here are some interesting observations about this one:

- two pieces of tape on box, one on each side

- manufacture date 7/2013

- on first start/set up screen, default language set to Korean

- on start up, no automatic first update... However, I did get notification to download the JSS15J update, which I've not done yet (too afraid, lol)

So I'm not sure if this is from a new batch, a different factory, or what... was bought from Best Buy, brand new, unopened. Just relieved to finally get a good one!

FYI, have not yet tested GPS, but will do so later tonight
[Nexus 7 (2013) Q&A] :
My girlfriend got the tablet. I returned mine and got an ipad 4. I'll be returning that within 30 days cause a new ones coming soon but I needed a functional tablet
[Nexus 7 (2013) Q&A] cowabunga:
So what is the general thought on whether this can be fixed in software vs it being a hardware problem and we're screwed. I bought 2 of the new N7, one for the missus and with the GPS lock issue, I'll be damned if I keep both if the problems are in hardware and cannot be fixed.

Was trying to switch the missus from Apple devices and it's not going too well. :mad:
[Nexus 7 (2013) Q&A] :
Love android phones but all the apps are pretty much up scaled phone ones :/
[Nexus 7 (2013) Q&A] sfhub:
Not knowing the true cause we can only guess if these problems are fixable in software.

If I had to guess GPS is probably fixable in software as I can get GPS working for long periods of time by avoiding running multiple GPS apps.

Random reboots is probably fixable in software too, as I can avoid that by not using certain apps.

Multi-touch my guess is probably 50/50 right now on software fix. If Google/Asus would provide more info on the cause then we could make a better guess.
[Nexus 7 (2013) Q&A] michaelg1030:
I agree, but I'm just thinking that that connection is poor.
[Nexus 7 (2013) Q&A] Coronado is dead:
Ugh, have to decide on returning today. Might get a second at another store and if it has the same issue return it. If not keep it and return the original.
[Nexus 7 (2013) Q&A] LoopDoGG79:
If you have a Costco in your area, I highly suggest getting a membership. They get some excellent prices on electronics!
[Nexus 7 (2013) Q&A] delfin2003:
I've noticed that too on my 4th replacement at best buy! Two white seals on the box instead of one. Also did not have any issues at first, but after the update, multitouch issues are back! I'm not worried about it, it should be a software fix
[Nexus 7 (2013) Q&A] Swizzly64:
For me it has something to do with battery power left.

If my battery drops below the 15-20% mark the multi-touch problems appear. I charged the tablet to 30%, disconnected it from the power charge and now it works fine again. Wtf..
[Nexus 7 (2013) Q&A] Coronado is dead:
Well, I got a 32 gig today to try against my 16 gig. Turns out both have the single touch issue when not grounded, but only when the screen protector is on. Now to decide which one to keep. The 32 gig does seem to have a little bit of a multi-touch issue when the axies cross. Not sure on the 16gb for that one. The 32 was 06/2013, the 16 07/2013.
[Nexus 7 (2013) Q&A] cyberprodigy:
Would you make a quick video showing this? I just don't believe that there are any devices that don't have the multi-touch problems.
[Nexus 7 (2013) Q&A] :
My touchscreen is not too bad so just to avoid any issues I made this small mode to keep my tablet grounded with my hand.

I use one of the metal tab from a two hole paper holder that I flatten out:

Then I bended it about half way, over a large needle, to allow thickness:

Then I inserted it between the back cover and the outside of the charging port:

This allow for the metal plate to stick out and my hand to be in contact with it. In portrait my pinky rest on the plate keeping the tablet grounded. It also keeps the charging port free and useable:

---------- Post added at 01:03 PM ---------- Previous post was at 01:00 PM ----------

Sorry for the pics size must have chosen the wrong setting:silly:
[Nexus 7 (2013) Q&A] **Menos**:
And after these steps, the problem with the screen disappear?

You just need to insert a metal plate and all?

Or should all the time connected the cable?
[Nexus 7 (2013) Q&A] :
Yep it dissapears, don't need it to be plug in. I made a couple of videos on youtube about my first mode with an adapter.
[Nexus 7 (2013) Q&A] **Menos**:
Can you give a link for your channel?
[Nexus 7 (2013) Q&A] :
Here you go:

https://www.youtube.com/watch?v=0bjOELnp92E&feature=youtube_gdata_player

https://www.youtube.com/watch?v=ZQD5beyA4zU&feature=youtube_gdata_player
[Nexus 7 (2013) Q&A] **Menos**:
I have already find it.

Last question, fingers should always touch the piece of metal?
[Nexus 7 (2013) Q&A] :
Yes, as far as I can tell its an issues with the grounding and the touchscreen.
[Nexus 7 (2013) Q&A] cyberprodigy:
If you were to connect a piece of sponge to the metal then that would keep it effectively grounded without the need for your finger to be touching it.
[Nexus 7 (2013) Q&A] **Menos**:
A piece of metal is well kept?

Do not fall?
[Nexus 7 (2013) Q&A] :
Yes it is well kept as it is inserted between the charging port and the cover. If it does ever come out and you loose it just make another one.

Hmmm! A sponge, you have to ground to the metal somehow that's what makes it work. I just use the tablet normally and my hand is in contact with the metal in a natural way.
[Nexus 7 (2013) Q&A] cyberprodigy:
Back in the day I made a stylus with sponge, a pen tube, and some wire.
[Nexus 7 (2013) Q&A] **Menos**:
Where did you get so piece of metal? In my paper holder I haven't so.
[Nexus 7 (2013) Q&A] bckrupps:
that is for the note 8? in store? sounds like the tab 3.
[Nexus 7 (2013) Q&A] :
You will have to use some imagination here, you can make it of any thin metal. What I use can be found at any office supply here.
[Nexus 7 (2013) Q&A] cyberprodigy:
I took the piece of metal that holds papers into folders. They are meant to hold three hole punched paper. They are easily bendable and just keep bending them until they fall off.
[Nexus 7 (2013) Q&A] :
I just made another a tad wider using the metal from a usb plug:
[Nexus 7 (2013) Q&A] sfhub:
All the ones I tested with spasdic multi-touch could be worked around simply by placing a finger on the bezel. I assume that doesn't work for you folks and that is why you are going to such measures?
[Nexus 7 (2013) Q&A] :
Well my bezel is made out of plastic or maybe alluminum so no electric conduct possible.
[Nexus 7 (2013) Q&A] sfhub:
I know what it is made out of.

Touching the bezel on 4 of 5 units with multi-touch issues was able to get rid of them. The 5th unit I tested didn't have issues.

Lots of folks have said they only get the multi-touch issues when they put the tablet on a table. When they hold it in their hand it doesn't happen.

You may want to try it to see if it helps. If it works for you, it is a lot less hassle.
[Nexus 7 (2013) Q&A] :
Well it does work for me. So for the folks which have no problem when holding it in there hands and goes crazy when flat on a table, how does it react flat on a table and touching the bezel?
[Nexus 7 (2013) Q&A] sfhub:
It works fine when layed flat and touching the bezel (or case). I am not saying it will work for you, just that is how it behaved for 4 units I tried it with as well as others saying the spasdic multi-touch doesn't happen when they hold the unit.

I can touch just the back of the tablet and the spasdic multi-touch goes away.

I can touch the black bezel of the glass area and the spasdic multi-touch goes away.

It is quite obvious the multi-touch issues go away.

BTW the whole glass area has a transparent conductive layer including the black bezel area of the glass.
[Nexus 7 (2013) Q&A] aimfire72:
Nah dude, don't have time for videos, lol. Trust me, already exchanged 3 bad ones - I know firsthand what the multitouch issues are all about - this new 4th one just doesn't have it at all. Put it through the test last night on a flat service, playing games, etc. Even tried with a case on (Moko Ultra Slim) which has a plastic back - no touch issues.

That being said, I still haven't taken the latest OTA. And probably won't until Google addresses the issue. I still have no idea if it's software or hardware...

Sent from my Nexus 4
[Nexus 7 (2013) Q&A] cyberprodigy:
That is why you have no issues then. Many people report that the problem doesn't exist until you install the update.
[Nexus 7 (2013) Q&A] aimfire72:
Why don't you just tape a hot dog to the back of it? lol j/k ;)

Sent from my Nexus 4

---------- Post added at 02:04 PM ---------- Previous post was at 02:03 PM ----------

Maybe... I hope it's just a simple software patch that fixes them all!

Sent from my Nexus 4
[Nexus 7 (2013) Q&A] sfhub:
It happens on JWR66N as well as JSS15J.

It just depends how bad you have it to start.

If you don't have it on JWR66N you won't have it on JSS15J

If you have it very slight on JWR66N, it can get more noticeable with JSS15J.

I think you have been burned so much that you can no longer believe other folks who know what they are seeing are not seeing the problem with a particular unit. They aren't saying it isn't a problem for your unit so you shouldn't feel like they don't know what they are looking for.
[Nexus 7 (2013) Q&A] cyberprodigy:
I just wish there was a way to downgrade. I'd love to not have to deal with this crap.

And if that is true, then why don't you upgrade?
[Nexus 7 (2013) Q&A] sfhub:
I have upgraded and downgraded multiple times.

On the unit I don't see the issue, there is no issue with JSS15J either.

On the units where I see the issue, it is worse in JSS15J but was there even before I upgrade, just lest noticeable.
[Nexus 7 (2013) Q&A] cyberprodigy:
How would I go about downgrading?
[Nexus 7 (2013) Q&A] sfhub:
I pulled my own image of JWR66N, and use the factory JSS15J images. I can upgrade without touching the bootloader also.

It's not the same way I'm doing it, but you can do the same, just use a nandroid backup of JWR66N to downgrade.
[Nexus 7 (2013) Q&A] rubejb:
Great to hear. I've got one that is quite wonky, especially when tap typing and when trying to use Unified Remote.

So I just got my replacement from Amazon today and it doesn't seem to have the issue. All I did was take it out of the box, do the initial setup and install a touch screen test app. The app on the old one showed the erratic touch, but this one seems to work perfect so far.

I'm going to install TWRP and make a backup right away. Is it possible to simply take the OTA update then or do I need to flash stock recovery and whatnot?

Thanks.
[Nexus 7 (2013) Q&A] cyberprodigy:
You need to flash TWRP and make a Nandroid backup before updating or you will lose the ability to downgrade.
[Nexus 7 (2013) Q&A] rubejb:
Thanks for the quick response.

My question is.... do I have to flash back to the stock recovery before I take the OTA update? A backup in TWRP is my first step. :)

edit:

Guess not. Did the OTA update and it booted into TWRP and performed it. I'm surprised, my HTC phone wouldn't let me do OTA's in that manner.
[Nexus 7 (2013) Q&A] sfhub:
I've flashed Samsung, LG, HTC and now Google/Nexus.

It is safest to use stock recovery for OTAs, but they can work with custom recovery.

The part where they patch ROM files will usually work with both stock and custom recovery. The places where you might have issues are the low level stuff like bootloaders and radios. Since you seem to have successfully done the OTA flash and presumably are on the 3.14 bootloader, that apparently did work over TWRP. The only remaining one to watch out for would be the radio in the LTE version, which wouldn't concern you.

Anyway I would have flashed the JSS15J factory image instead of taking the OTA because you can flash the ROM and keep the old bootloader, verify everything works, then flash the 3.14 bootloader separately. I personally have not noticed any difference between 3.05 and 3.14 bootloaders regarding multi-touch, but some folks claim the firmware makes a difference so I figured I'd mention you can edit google's flash-all.bat script and skip the bootloader flash, and just flash the JSS15J ROM.
[Nexus 7 (2013) Q&A] berardi:
I'm done... 6 exchanged units is enough for me... Going to use my OG Nexus until ipad mini retina comes out... Hoping it has a GPS chip this time
[Nexus 7 (2013) Q&A] LiveFaster:
Did I make a mistake buying my 32gb nex7 on Craig list? It was new in box so do I still have warranty from Google? :o

Sent from my Nexus 7
[Nexus 7 (2013) Q&A] rafa3L:
One year warranty from Asus should still work. "It was a gift."
[Nexus 7 (2013) Q&A] wintermute000:
I think there's a time factor as well. Mine only had minor issues that were pretty much unnoticeable when held. However after around three days uptime (battery was above 50%) suddenly it went terrible and wouldn't even recognise single swipes. Rebooted and problems gone, rotating merrily away in maps and everything.

Given stuff like this and all the people who had no issues before the update I'm confident all will be fixed with software or firmware flash.
[Nexus 7 (2013) Q&A] kentondb:
Any word from Google would be HIGHLY appreciated.
[Nexus 7 (2013) Q&A] **Menos**:
Of course, but I think that in Google is also not yet really understand the problem.

If a software error then Google should say something. And if the error of the tablet then Asus will say something
[Nexus 7 (2013) Q&A] eyecon82:
I wouldn't call exchanging it 3 times is staying calm. Plus everyone is saying it worked fine out of the box and causing issues after the update
[Nexus 7 (2013) Q&A] Crescens:
What I'm seeing with my 32gb unit is extraneous touches, but only along the edge of the screen and ONLY while the device is unplugged from the charger cable. I haven't been able to replicate the problem with the cable plugged in, but as soon as I pull it out the extra points come back. Actually, it looks like I don't even need to fully plug the cable in, just making contact with the socket is enough to eliminate it.

-edit-

Forgot to mention that this is using the tablet flat on either of a wood or stone table so far.
[Nexus 7 (2013) Q&A] kentondb:
I returned mine just now. No 32GBs left for a 40 mile radius. Not driving that far to play fetch.

I'll try again in a few days...
[Nexus 7 (2013) Q&A] michaelg1030:
Those that are having issues with the keyboard, but all the test apps show no issues, I really think that it has to do with the fact that you are not used to this tablet. Maybe your current device has a SP on it or you haven't figured out typing on this device yet.

The touch screen is extremely sensitive AMD if you don't lift your finger up, it will def register double clicks.

Idk, maybe not, but for the most part this is my first tablet and I find that if I really look where my fingers are hitting the keys, I do not have any issues. I can still type pretty fast like this, but I seem to have multi touch issues when I kind of type from memory of key placement.

Also, it seems worse using thumb keyboard probably b/c o really am not used to that.

So just give it a couple more days before you go and return it b/c you are having difficulty typing on it.

Those that are having lose multi touch or touch altogether and can reproduce it with the app, well that's something I would get exchanged.
[Nexus 7 (2013) Q&A] bobafuzz:
I didn't have any real issues with multitouch before reading this post besides long pressing didn't work every once in awhile, I chalked it up to not being used to the the tablet yet. I went and downloaded YAMTT to play around and noticed on two touches, when crossing the X or Y asix it would jump around a bit. I fire up google maps and try to do a full 360 rotation and never once succeeded. It would always stop halfway usually after crossing x or y axis and zoom out or in instead of continuing to rotate map.

Those who are not having any problems can you do a full 360 rotation with the map app? I'm really hoping this is just a software issue the tablet is great otherwise, I don't really want to roll the dice and exchange.
[Nexus 7 (2013) Q&A] camilozano98:
I too have this problem, the multitouch doesn't properly work. It's specially a hassle while playing games like Dead Trigger. Although my keyboard works fine. What I've noticed is that the multitouch does work while the tablet is on top of a surface, and while it's charging (weird, I don't know why). I read that it might be a software issue with the newest firmware, is there a way to downgrade to 66n?
[Nexus 7 (2013) Q&A] IonDEfeso:
This is exactly the problem im experiencing on my 32GB nexus 7. When the two touch points intersect vertically or horizontally it makes the screen behave crazily even when I dont make any other movement. I think ill wait one or two more days before returning it, I hope this is somehow a software problem.
[Nexus 7 (2013) Q&A] bobafuzz:
If you do an exchange, please let us know if the new unit have the same issue, thanks.
[Nexus 7 (2013) Q&A] Crescens:
I just picked up a replacement 32gb device from a 2nd Best Buy in the area, and it still has the same problem.
[Nexus 7 (2013) Q&A] husker91:
Yeah I'm really reluctant about exchanging it as its perfect otherwise... Really hoping it's software. Has anybody gotten a hold of Asus about this?
[Nexus 7 (2013) Q&A] HKSpeed:
would a screen protector desensitize the screen a little? i had a thick screen protector on my Galaxy Note 2 that reduced sensitivity.
[Nexus 7 (2013) Q&A] notmilk:
having same problem after the replacement....GOD...im about to give up on the new nexus 7
[Nexus 7 (2013) Q&A] jiggytom:
It's a software issue... Let's not freak out... I'm sure they are aware and it will be fixed in the next release.
[Nexus 7 (2013) Q&A] notmilk:
i dont think its software related, all 3 Nexus 7 i have behave a little different on different spots of the screen.
[Nexus 7 (2013) Q&A] JayBomb999:
Unfortunately, I agree with it likely being a hardware problem. I'd love to know why people are so certain that it's software related? Is there any real evidence for that? Has anyone flashed a custom ROM and found the the issue is gone?
[Nexus 7 (2013) Q&A] Lexord:
Jaybomb, can you tell me where are you getting it? And where in the US? I don't want to have the need to exchange mine (next week) :(
[Nexus 7 (2013) Q&A] JayBomb999:
I purchase mine at 3 different Best Buy locations. I live in the Detroit area.