yashsingh1/xdaforums huggingface dataset:
[Nexus 7 (2013) General] jfriend33:
Which app?

These imgs are to be flashed and I don't believe they are for other tablets like the nook.

Or were you just experimenting?

Sent from my unlocked consumer edition Motorola Droid Maxx xt1080m.
[Nexus 7 (2013) General] AndyYan:
I think he means the Nexus 7 II Tester, which is supposedly universal.

Sent from Google Nexus 4 @ CM11
[Nexus 7 (2013) General] jfriend33:
That app is a joke. It makes my phone freeze even.

Sent from my unlocked consumer edition Motorola Droid Maxx xt1080m.
[Nexus 7 (2013) General] _jis_:
No, this app isn't joke.

This app just show you that your N7II is prone to EMI from displayed moire pattern because its LCD/touch panel combo has fatal design flaw. The same is valid for mine and all other N7II units. You cannot mask this HW design error by flashing any TSxx firmware to your touch screen controller. Yes, flashing the right TSxx can help you use your N7II better, but the problem is still here and this app show you this.

Nexus 7 II Tester is not multitouch tester, it is a tester for EMI susceptibility and all N7II units are horribly affected by EMI.

Nexus 7 II Tester just show static moire picture in a precise way 1:1 without any picture resizing / resampling to boost EMI generated by LCD (picture resizing destroy moire pattern and lower EMI generated by LCD). That was invented purely incidentally, but problem is that no other Android touch screen device has its touchscreen controller so susceptible to EMI from LCD panel itself. Nexus 7 II Tester doesn't measure level of this susceptibility, with this tool you can just test / demonstrate the flawed touchscreen controller of your N7II device.

If you still don't trust this app you can test your N7II with plain web page:

http://timothyehat.com/m/checkerboard.html

Or you can test various other apps which I mentioned in my previous posts.
[Nexus 7 (2013) General] jfriend33:
My droid maxx doesn't have any problems what so ever. Yet goes crazy with that app.

My Nexus 7 2013 works better than brand new ones at staples and it had ghost touches which were fixed by the ts fix.

Why wouldn't the app work correctly then if the issues been fixed? I'm not disagreeing with you.

There must be more "under the hood" I'm not aware of.

Sent from my unlocked consumer edition Motorola Droid Maxx xt1080m.
[Nexus 7 (2013) General] _jis_:
Oh, so it is another device which has its touchscreen controller susceptible to EMI from LCD panel itself. Maybe it has LCD/touch panel combo from the same manufacturer?

Yes, it is. As I said, flashing some of the TSxx can help you use your N7II better, but the problem is still here, the threshold for EMI susceptibility is just shifted a little bit higher, so it is well masked in normal use conditions, but Nexus 7 II Tester show static moire picture in a precise way 1:1 without any picture resizing / resampling to maximize EMI generated by LCD. This way you get EMI on much higher level than you can get at normal conditions.

Now you may ask why bother with testing EMI susceptibility at such abnormal conditions which are far away from normal conditions? The bottom line is that no other Android touch screen device (other than N7II and droid maxx) has its touchscreen controller so susceptible to EMI from LCD panel itself.

For example I have four various Samsung phones and all of them doesn't have any problem with this test. Touch screen on my Samsung Galaxy Note II is a pure delight with its sensitivity, accuracy and comfortable tactile surface when I compare it with N7II. It is not so wide known fact, but AMOLED display is much less noisy than conventional LCD. So owning device with AMOLED or OLED display has a hidden benefit which greatly enhances the user experience :)
[Nexus 7 (2013) General] jfriend33:
Thanks for the info, seriously. I didn't know the type of display had any impact on its vulnerability. I really just thought it was battery consumption, resolution, ppi, and sunlight viewing.
[Nexus 7 (2013) General] _jis_:
You are welcome :)

You can read this article:

Touchscreens being integrated inside LCDs | EE Times
[Nexus 7 (2013) General] TheDukeofErl:
I just got a N7II and have had minor issues with the touchscreen. TS11 made it so that I could use 9 fingers in YAMTT but 10 still made it go wonky.

Do you guys think its worth trying to RMA it while I have warranty or are the odds of it getting fixed/worse greater than the chance to get better?

Edit: I suppose its worth noting that I already have an RMA number and that the bottom of the screen is also a bit low in sensitivity overall.
[Nexus 7 (2013) General] kingston73:
Some people are just way too ocd or perfectionists or something similar. I just don't understand the point of testing in ways that you well never ever use just to prove some random point. I've said it before, if you can use your tablet as you normally do and don't notice any issues than what's the problem? If it bothers you either get something else, try fixing it yourself, or try warranty.

So for theduke, if you have to be able to use all 10 fingers on your screen and you can't, fix it or sell it. I can't see any circumstance or app that requires 10 fingers but if that's important to you, OK. If everything during normal use is fine then you don't actually have a problem, right?

Jis, I would argue that if you don't know you have a problem then it doesn't exist. Unless the unnoticed issue will cause some kind of failure or will gradually get worse, if you don't see it it's not actually a problem. Everything I've read about the touch screen issue make me believe it's not going to cause any failures. If you like the Samsung amoleds that's great, not really sure what your point was with that since nobody forced you to buy the n7.
[Nexus 7 (2013) General] jfriend33:
You won't be pleased with Asus warranty service. While I've never sent mine in I've read many stories where they just flash older firmware and don't physically fix or replace anything.

Your tablet will be out of commission for a long time depending on how many times you have to send it in.

I would seriously try flashing every fix even the experimentals. And just sell it as is on eBay with the best ts fix flashed.

Sent from my unlocked consumer edition Motorola Droid Maxx xt1080m.
[Nexus 7 (2013) General] Hnk1:
Check this out, I am testing every built and I am hoping to find the best one for me too. I have shared my experience with all builds I have tested. I hope this might be helpful. I check each build for a two or three days before giving my final verdict because in the beginning, all seem to work flawlessly.

http://xdaforums.com/showpost.php?p=53410257&postcount=1389
[Nexus 7 (2013) General] mrsags:
what worked for me

Hello all, this is my first reply so I'll try to make it with your time reading.

Hardware : nexus 7 sep 2013

ROMS: cm11 PA, cleanrom and purity

Only one that worked was purity 7/22/2014 with ts30

All others worked initially after multiple reboots then had either ghost touch or continuous multi touch issues, I tried every ROM, different release for all of the above and the only one that seems to work is purity 4.4.4 with ts30 ..thankfully, its as close to cm11 as u can get...w/o art tho :( hope this helps since I am super enjoying my nexus now w/o TS issues..
[Nexus 7 (2013) General] _jis_:
And other people are just the opposite with highly forgiving errors threshold... So everyone's point of view could be different, but is normal I think ;)

I answered this before and thoroughly. The reason wasn't proof some random points over screen, but proof that N7II has flawed HW design which is prone to EMI from LCD itself. Nothing more.

I am sorry but I don't say mine is better than yours. We have both own N7II, so we are on the same boat then. I just mentioned my personal observation that touch screen on my Samsung Phone has definitely better sensitivity and accuracy when I compare it with N7II's touch screen. And then I explain one of the reason why is there such an obvious difference. It is because that phone has AMOLED display and it is not so wide known fact, but AMOLED display is much less noisy (I mean with respect to EMI) than conventional LCD. So touchscreen controller in devices with AMOLED or OLED displays will never suffer to EMI from LCD panel itself as in N7II. I don't say that AMOLED is better or best as a display device. I just compare both display technologies from that aspect which is not so much known in hope that it could be interesting for someone here as it was for me.
[Nexus 7 (2013) General] _delice_doluca_:
I have read most of the pages, including the ones that people say the app was a fake (display tester). I have been thinking about it and found a way of myself to proof it.

What I did is to open that gamma page and touch nowhere on the screen. Only captured a screenshot by pressing the power + Volume down buttons. Then in the image editing section I have cropped the navigaton buttons from the picture. And then turned the brightness to full. Now it's time to go to gallery and look at that picture as it will "almost" be 1:1 since it's a screenshot without the navigation buttons part.

The result? Touchscreen goes crazy, even when my hands are away from the screen the picture tries to resize itself like I am pinching the screen. What's more sad and annoying is, it's not only a "touch defect" but also the picture on the screen is "wrong". If you look at the actual navitagon buttons, you can see that the picture's pattern is also drawn there too (like the navigation buttons are transparent and the picture is bigger then it is).

I know there is a way to reduce EMI and restore most of the touch function but what about that picture overflowing to the navigaton buttons? That's clearly a problem with screen itself more than the touch panel.

I also tested Galaxy Tab Pro 8.4 and absolutely no problem touch-wise (except that the picture that was supposed to be at white tones, was actually clearly green-ish).

Note: I'll go further and create a test environment for all the drivers in this forum and compare them with the original one.
[Nexus 7 (2013) General] TheDukeofErl:
Ok, I'll play around with the firmwares. TS11 seems to help with the low sensitivity but the bottom of the screen is calibrated incorrectly on all of the firmwares (including default). Is there any way to manually change the calibration?

Edit: Played around more with the bottom of the screen, still experiencing multitouch issue.

Edit 2: None of the custom firmwares seem to be working. I'm planning on just returning the tablet to woot. Thanks for all your help guys!
[Nexus 7 (2013) General] leo_the_noob:
Just wanted to say thanks for an excellent solution! I bought a nexus 7 with broken screen and replaced the screen myself. I've had the issue that others have mentioned with lost sensitivity in the qaws area of the keyboard. Made swyping a huge pain. Installed ts10 and touch is perfect now! I assumed I had a defective aftermarket digitizer but it's working great. Thanks again!
[Nexus 7 (2013) General] Hnk1:
Well, exchange the tablet if it seems easier but to check these firmwares, you need to give it some time. Not hours but rather at least one and half day for each individual file.

I know it's a slow process but it has worked for me. I'm using t25 and I haven't seems any issues till yet since a day.

In the beginning, it could act strange but give it a bit time and you'd actually see a lot of difference later.

I hope you are following the instructions as well on first page like after flashing, wait for two minutes and then restart twice etc.
[Nexus 7 (2013) General] TheMaskedHamburger:
So crazily enough, TS-11 continued to work perfectly

all the way up to 3 days ago. Ghost touch issues suddenly came back, not sure how that's possible, looks like I'll have to try reapplying the fix...
[Nexus 7 (2013) General] _delice_doluca_:
Where are those "11" or "25" firmwares? In the first post only appears"10", "20", "30" ?
[Nexus 7 (2013) General] trvbone:
Those are the experimental ones. They're listed aren't they?

Sent from my USCC Note 3

---------- Post added at 04:15 PM ---------- Previous post was at 04:14 PM ----------

First post

http://xdaforums.com/showthread.php?p=45183659

Sent from my USCC Note 3

---------- Post added at 04:16 PM ---------- Previous post was at 04:15 PM ----------

Exp 1 exp 2 zips

Sent from my USCC Note 3
[Nexus 7 (2013) General] LemonPlusTea:
I think my touchscreen started going wonky after my update to 4.4.4..

Whenever I touch the area about half an inch above the 3 onscreen buttons at the bottom, a ghost touch appears that clicks the area below it aka the back, home or recent apps button. The rest of the screen's touchscreen capabilities remain unchanged and well though...
[Nexus 7 (2013) General] Meap158:
Anyone who has tried this fix, could you confirm this for me. Put your fingers on your N7 like in this video and see if it fixes it. Touches jumping around and not recognized is pretty annoying. youtu.be/9th5MPNswas
[Nexus 7 (2013) General] Matrix_19:
I'm on TS09 for the last 9-10 months

on my tab, it was the best compromise from all the TS (I tried all of them)

in fact TS11 was the best to fix my multitouch issues, however it was too sensitive... I mean 25% of time I couldn't just "press and hold" correctly.

However, a side effect of those "experimental" TS is that we have a ghost touch issue that suddenly come back, from time to time.

I can fix this simply by turning off the screen, wait 2 seconds, and then put it back on.

You can try this next time :)
[Nexus 7 (2013) General] _delice_doluca_:
I have a different solution but no one will like it. This solves the problem 99% but it comems with a drawback!

*First, enable developer options and tick "show touches" to understand if it really works for you or not*

You can use Nexus 7 Tester named app to test it,

I have been trying to find out why other devices I can get my hands around did NOT have that issue this much or at all and noticed that our Nexus 7's screen has better color and picture quality than all of them. Even super pixel density Galaxy Tab Pro 8.4 doesn't have as good calibration as it has..

So, what I did was simply trying to reduce the gamme value of the screen by alterint its perfect calibration (sorry Asus, your fault to have a perfect screen with a weak touch panel). As a non-developer I could not play with the kernel default values so I didn't have chance to directly change the gamma value. Instead, I downloaded "Filter your screen free" app and turned aphla option to full. This really makes the screen dimmer so you have to turn the birghtness on thus making you notice the color scale is much narrower now (there is no real, full bright whites nor the deep blacks). Now use the Nexus 7 tester app and hopefully you will not see any ghost touches.

There is also Screen Adjuster Free app, it's more efficient because you can directly adjust contrast thus reducing gamma but it really makes the device go into lag and any game is unplayable when it's on. I am open to suggestions about screen calibration apps or kernel mods :)

A small note about those ghost touches: even though the screen has permission to register 10 touches at the same time, it's so ridiculus that those ghost touches can be much more than 10 at the same time. What a bad written driver!
[Nexus 7 (2013) General] _jis_:
It is a great discovery :)

But it makes perfect sense. What you did as a side effect is that you lowered EMI generated from LCD itself. So your touch screen controller isn't affected by EMI and even Nexus 7 II Tester will work on such a N7II without glitch.

But as you say no one will like it. But it is another proof for what I said here many times. Thank you!
[Nexus 7 (2013) General] osm0sis:
Interesting.. So what if you're on a custom kernel with the kcal/rgb offsets? Someone with bad touch issues should try lowering all of them to see if it fixes it, then it'll just be about finding an acceptable balance for your screen at the lower range and there won't be any app mediation or slowdown at all. :)
[Nexus 7 (2013) General] _delice_doluca_:
I am on a custom kernel and I can try it if I can find good instructions. Right now I use Glitch kernel and set things up only on the aroma screen. I don't even know if it's possible on this device to calibrate the screen values like on the Nexus 4 which -ironicly- we could set higher gamma values :)
[Nexus 7 (2013) General] osm0sis:
It is. Franco and Faux definitely have it and I'm sure others have cherry-picked it. Then search for Franco's Nexus Display app thread for the free xda version of that and it should be pretty straight forward from there.

I use it to make my screen a little less warm, color-wise.
[Nexus 7 (2013) General] ortori:
Is there a way to fix the grounding problem?
[Nexus 7 (2013) General] bradputt:
Well I used metal tape to shield the brown cable too.

Making sure it's grounded to the orginal grounding components.

Then I revert to the unlock file at the beginning of this thread.

So far it improved a lot, though it's still not that perfect.

But at least it's much more usable.

And I broke the back cover in the process of taking out.

Damn you Asus!
[Nexus 7 (2013) General] ortori:
Thanks for explaining this to me but my tablet is perfectly usable, the problem is when I put it on my bed or on a table.

When I do that the tablet can't register 10 fingers and only register about 2-3 fingers, is there any fix for that?

I seen that the one plus one had the same problem but they fixed it is it the same with our tablet?

Thanks.

http://ausdroid.net/2014/08/21/oneplus-one-touch-issues-fixed-sort/
[Nexus 7 (2013) General] mdamaged:
Just wondering. How many fingers do you need to use a tablet?
[Nexus 7 (2013) General] ortori:
At least 3 fingers
[Nexus 7 (2013) General] mdamaged:
In that use case, it sounds like the tablet is fine as is then. No?
[Nexus 7 (2013) General] ortori:
Not at all, when its on the bed or table when I use even 2 fingers its start flickering and not working well.
[Nexus 7 (2013) General] mdamaged:
Your complaint was that it only reads 2 or 3 fingers and not 10. I must have misunderstood.
[Nexus 7 (2013) General] ortori:
when its in my hand its read 10 fingers and working well, when its on my bed or table its reading up to 3-4 fingers but its also flickring and not working well.

but this is not the issue, the issue here is that its need to read 10 fingers when its in my hand and 10 when its on the table and 10 when its on any surface no matter where!!
[Nexus 7 (2013) General] mdamaged:
May I ask how you hold it in hand, while using all 10 fingers in the display simultaneously? Do you have 3 hands? :p
[Nexus 7 (2013) General] ortori:
lol i put it on my lap or let someone else to hold it.

so i understand that there is no solution to the grounding problem so i hope Asus will burn in hell and they will bankrupt as soon as possible.

thanks.
[Nexus 7 (2013) General] fuser-invent:
Search this thread for the ground problem. Plenty of people have commented on it. Ts11 solved completely solved the issue for me. The tablet is fine now.
[Nexus 7 (2013) General] ortori:
when you put it on the bed or on a pillow its read 10 fingers perfectly?
[Nexus 7 (2013) General] fuser-invent:
Yes.
[Nexus 7 (2013) General] kaibosh99:
This tablet ended up being a @#&%'ing joke of a piece of hardware - I can apply all the 'fixes' I want and I still can't even play a game like 'Block Fortress' reliably. That's only 2 fingers!

What a disgrace, there should be an across the board payback program for this garbage.
[Nexus 7 (2013) General] kingston73:
So because your specific tablet doesn't work it's a Joke and Junk? I'm sorry you have problems but I think it's important for everybody to understand that they are only a single individual in a sea of consumers. If even 90% of the tablets work well than that's probably a great success for a company. How many total people are on xda?

I haven't had any issues since using TS11, I have been able to successfully play any game I've tried so far but I'll admit I have not tried using all 10 fingers at once. I've said this before and will say it again, if the TS fix can give you a tablet that works for whatever you need it to do why worry about things that don't matter? (like using all 10 fingers)
[Nexus 7 (2013) General] kaibosh99:
This problem isn't 'rare' by any stretch of the imagination. There are complaints about it all over the Net. It is a grotesque failure in design and there should be a full refund for those with the problem. I bought this as a gaming machine and it is a complete and utter failure at such.
[Nexus 7 (2013) General] osm0sis:
And mine works fine with no mods at all. A 15% failure rate of screen hardware doesn't make the device as a whole a failure.
[Nexus 7 (2013) General] kingston73:
You completely missed my point and actually kind of helped my point. Thinks about it, how many people bought the n7, how many of those n7 users are on here, and how many of those have problems? Just because you "read it in the Net" doesn't mean it is true or widespread, sorry.
[Nexus 7 (2013) General] kaibosh99:
Yeah, only 2.2 million Google resutls for 'Nexus 7 multi touch issue'. I was obviously blowing my ultra rare easter egg of an problem way out of proportion. It is most certainly TRUE and WIDESPREAD, sorry.
[Nexus 7 (2013) General] kingston73:
Guess we'll have to agree to disagree. You honestly think there are 2 million unhappy n7 users?
[Nexus 7 (2013) General] player911:
This is completely inaccurate. The failure rate is a majority. I've personally been through 5 Nexus 7's and did a project that required 30. EVERY SINGLE one failed.

It is a grounding problem during manufacturing. If you lay the tablet down, unplugged, and only use 1 hand to manipulate the OS, you'll notice that it immediately stops recognizing touches. If you hold in 1 hand or with it plugged in, then it works perfectly.

The problem is that when you are laying in bed and using the device, say watching Netflix on Chromecast, you can't just reach over and make a quick tap to play the next episode. You physically have to put 2 hands on it before it will recognize the touch.

I've touched so many of these Nexus 7s to get an idea that it isn't just a fluke or a small percentage. If you test properly you will know it plagues most. Most people just don't use their tablets in such a way to notice. I personally don't see how anyone can't notice.

I've done lots of the flashes and fixes and reconnections to know that none of them fix it 100%, although the flashes do get close to a workable solution.
[Nexus 7 (2013) General] osm0sis:
While I can't disagree with what you say. I'm more in the camp of "if it works fine for me in my usage then it isn't broken for me."

I can of course reproduce the touch issue when I put it on a pillow, but I don't usually do that so functionally it's fine.

People who have the worse problems where the screen is unusable are certainly more of a minority, and that's what we were talking about.
[Nexus 7 (2013) General] fuser-invent:
I had the grounding issues when the tablet wasn't in my hands but it works perfectly fine now with ts11. Took a couple of reboots but it's worked for several months and several CM11 updates now. I am still irritated by getting my tablet back from RMA twice not being fixed and getting a dysfunctional tablet to being with though. But now I love it.
[Nexus 7 (2013) General] player911:
My original N7 2013 did have dead spots and TS20 fixed that for the most part.

My latest N7 doesn't have dead spots, but becomes useless if not held or plugged in.
[Nexus 7 (2013) General] mindmajick:
All five of mine (for my company) work fine. The real shame is- i almost didn't buy any because of this thread.

Btw- I've set these up in a corporate environment running 20 n7s... No issues.

The glass IS fragile... But not one issue with multitouch. And TRUST ME, i use this bad boy one handed all the time.. With my other "bad boy" in the other hand lol.

--> Sent from my mind to your screen