yashsingh1/xdaforums huggingface dataset:
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] mi7chy:
Don't have this issue with pen or finger using Lecture Notes on Korean made GT-8013 bought from Amazon.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
Exactly. Perhaps a well grounded copper sheet shield. However this should be samsung work, not ours.

---------- Post added at 06:59 PM ---------- Previous post was at 06:38 PM ----------

My point is that there's no point in selling us a tablet with a 4 core cpu if even with that, we can't scroll text smoothly because, in order to save some cents, samsung have decided to equip this device with a 40 x 20 dots touch screen... It's a bit like buying a super smarthphone that can do everything and then find out that the speakerphone is so weak that you can't hear the person you're calling. A thing that every cheap10$ phone does perfectly.

So what I'm saying, is that a touchscreen like this is totally unacceptable for a device like this.

And no, it is not true that pen on paper it's the same. If you write slowly on paper and you get jagged lines then it is because you don't move you hand smootly, instead hereno matter how precise you are, it will always be jaggy simply because the digitiser is crap.

Even though I'm not that much into handwriting and drawing, and hence personally could accept a bad digitiser, what I really cannot accept are the consequences that it brings to scrolling, that this way can never be smooth, and to the precision in the position while tapping the screen, that is badly affected.

---------- Post added at 07:01 PM ---------- Previous post was at 06:59 PM ----------

Thank you for the suggestion and sorry to contradict you, but no, it is definitively the display.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
The fact that this is only happening to a handful of people means that it's probably something to do with the environment their using the Note in. A similar discussion came up before when some people were having issues using the touchscreen while their device was charging.

This

was the answer to

that

. It explains that we humans are part of the ground and how various things can affect a touchscreen.

I found it. It's electromagnetic interference caused by an improper earth connection (ground). The user and their finger touching the screen are part of the ground. Since all the charger's are the same it's either something to do with with environmental issues and the user or something to do with the power source not providing sufficient grounding. I have no idea why it affects some people and not others. Try rubber boots. ;) Here's the summary. The PDF has the long version with enough detail to make you want to poke your eyes out.

Projected-capacitance touchscreens commonly used in today’s portable devices are vulnerable to electromagnetic interference. The interference voltages are coupled capacitively from sources that are both internal and external to the touchscreen device. These interference voltages cause charge movement within the touchscreen, which may be confused with the measured charge movement due to a finger touch on the screen. Effective design and optimization of the touchscreen system depends on understanding the interference coupling paths and mitigating or compensating for them as much as possible. Interference coupling paths involve parasitic effects, such as transformer winding capacitance and finger-device capacitance. Proper modeling of these effects yields a detailed understanding of the sources and magnitudes of the interference. For many portable devices, the battery charger can be a key source of touchscreen interference. The charger interference coupling circuit is closed through the capacitance of the operator’s finger on the touchscreen. The quality of the charger’s internal shielding design and the presence of a proper charger earth connection are key factors affecting charger interference coupling.

https://www.dropbox.com/s/66yy4mtnlx09imb/Minimizing-Touchscreen-EMI.pdf​
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
I think mine is made in China.

Anyway, there could be only two reasons. Either:

1. the tablets from Korea are manufactured better than those from China, or

2. you may have failed to reproduce the issues. Because these issues are both rather subtle (yet annoying).

But if it is really true that some tablets do not suffer these issues, then I would perhaps try to claim samsung for a repair/replacement.

Ah, another thing I have noticed watching the video showing how to disassemble the device, is that the digitiser alone cannot be replaced. All the LCD display including the bezel needs to be replaced, otherwise the strength of the whole device gets badly affected.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
With as much discussion as there's been on S-Pen and the various Samsung and third party apps, you can pretty much assume if this was a widespread issue it would have been discovered earlier and been the subject of much greater discussion. I can't replicate any of the issues in this thread on my Korean-built N8000. And where it's built shouldn't matter; all the internal components are sourced from the same place.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
No. I've already thought about that but no, the issue is present ALWAYS. No matter where and how I use the tablet. No matter it it's connected to the charger or not. It is simply always there.

And, sorry but saying that capacity displays are things that are affected by electromagnetic fields is absolutely no justification. Because if so, then also all the other devices with capacitive displays should have issues. Instead these issues are only SPECIFIC of Samsung Galaxy Note 10.1, or at least of a large batch of these tablets.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
You have absolutely no idea whether that's true or not. You're making an assumption based on your expereince and the experiences of a handful of people. I think with the dozens of sketches like this that people have made in this thread ( http://xdaforums.com/showthread.php?t=1861201 ) they'd have noticed if a large number of Note's were having issues since they are heavy S-Pen users. I'd suggest you return or exchange your device.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
As matter of fact, I have put my hands on 5 of these tablets, and 5 out of 5 had exactly the same issues.

Then I came to read this thread, and found that other people have noticed that their tablet has exactly the same issues, and like me, they also found that all the other tablets they could test had those issues.

Therefore, the issues may not be so widespread, I can't say, but for sure there is at least a few batches of these tablets clearly affected.

And the fact that full batches of this tablet have these issues, means that the issues are due to some manufacturing PROCESS. They are not random issues due to normal failure rate of production. This is why it can happen, that tablets manufactured in a place of the world can have issues that others manufactured in other factories do not have.

And no, the internal components are not necessarily manufactured in the same place. For instance, in the Galaxy S2, to my knowledge there are at lest 4 different camera modules, made from different manufacturers. It is a matter of where and when the phone is manufactured, whether it is equipped with one module or another.

---------- Post added at 07:46 PM ---------- Previous post was at 07:39 PM ----------

Yes, I do understand and thank you for your suggestion. In fact, I have already reached a similar conclusion after seeing a few drawings published. What I fear is that either samsung will fail to recognise the issues, or will replace the digitiser with a similar one, given the 5/5 rate of failed units I was able to test.

You know, it's always a pain in the ass having to return a device, especially in my country, where refund or full replacement is no option, but only a repair is offered.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
They've sold 2MM through September so five isn't a relative number. I'm not saying you aren't having a problem or that a batch of devices produced doesn't have the defect that you're describing. But to use terms like "all" and "large" is being exaggerative. Again, there are heavy S-Pen users that have had the Note since it was released; I'm one of them. This would be a larger more visible issue if as you say the majority of Note's were affected.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
Ok, you got me... the point here, as I said before, is that in my conutry I have no options rather than waiting (30 days or so) for samsung to repair my device, provided they actually wish (they recognize that the device is defective). You know, issues like these are similar to bad pixels. Whether or not you get a replacement or repair, it depends on the manufacturer's policy and good will.

And also, if in order to save on costs, they will replace only the digitiser, they will have to tamper the bezel in a way that my note will not be as strong as it was originally, and in addition the repair will be clearly visible by opening the device.

To say the truth, I have already contacted samsung assistance for the s-pen issue, But then all considered and for the above reasons, I opted for keeping it as it was. But now, the added issue of the fingertouch digitiser is really annoying me, because it affects smooth scrolling, so I think I will reconsider everything.

greetings
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
I'll say this; the Note's my third Samsung tablet. Not counting the "newton rings" problem in the initially produced OG G-Tab 10.1's, the Note has far more issues with its display than earlier Samsung tablets. Light bleed and color output variations seem a lot more frequent. I'm guessing it's because inductive displays are more complicated to manufacture. I hope they get yours fixed quickly (and correctly). ;)
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] speedfreak007:
How many of you have bought cases on ebay with magnets in them? I have a case with magnets and those produce spots where the spen doesn't function correctly. If i remove the case, i have no problems at all.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
Yes, stay away from magnetic cases with this tablet. This, however, is easily understandable and acceptable since it's due to the intrinsic nature of the pen digitiser. It is not an issue and it has nothing to do with the issues discussed here in this thread.

Inviato dal mio GT-I9100 con Tapatalk 2
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Atomic Walrus:
Wow, that's bad news. I came here to see if there was any mention of this exact issue hoping that it was something rare I could get a replacement for. Mine is exactly like the image; the distortions move in a line from the first "S" in Samsung up to the top of the screen.

What's really strange to me is that the distortion only occurs with very light pressure; if I press harder it goes away. I can even confirm this by locating a spot right on the distortion line and touching the screen. When I first make contact, the pen "cursor" (the little dot you can turn on that shows the detected pen location) shifts a few pixels, and then returns to its normal position as the pressure gets stronger. I can't figure out why only the lowest stage of pressure is triggers the offset, but I'm not exactly an expert on the technology that makes these Wacom pens work.

I'm guessing the light pressure aspect is why most people haven't noticed it. The very light pressure that allows the distortion to appear in a line is less than I usually use when doing solid line drawing, but was more noticable when I was doing some random sketching. I managed to use the tablet fairly heavily for drawing for about 40 days now before noticing, so it wouldn't shock me if this is a widespread problem that's only been found by a small percentage of users. I'd like to ask everyone who hasn't experienced this problem to test with very light, slow diagonal strokes across the line above the S in Samsung. Slow because most of the drawing apps will smooth out this glitch if you draw a quick line. And by light I mean basically at the lightest pressure that it will recognize.

Also, just thought I'd mention that the inaccuracies at the edges are unfortunately pretty standard for Wacom tablets. I have a slightly older model Cintiq that does the exact same thing, it's just less concerning because you have more "good" surface area to work with overall. And if you watch the hovering cursor near the edges, you'll see that those distortions actually impact the floating cursor. The sharp central distortions don't ever show up (at least for me) until a light pressure is applied. Very strange.

I'm going to try adjusting the pressure sensitivity to see if it has any impact.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
Has yours always done it or did it just start? Do you have access to another S-Pen? What you're describing is exactly how mine behaved after the S-Pen got wet. If it did just start, how long have you had yours? If it's the display and not the pen that's not good as it could be a potential problem that develops over time.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Atomic Walrus:
I can't be certain if it's always done it or not. As I mentioned it only happens at the lightest pressure, and because I've mostly used it in Photoshop with pressure sensitive brushes I generally was using a medium pressure. I decided to play with S Note a bit more tonight and because it's not pressure sensitive at all I was sketching while just barely touching the screen, which is how I first noticed the distortion. So from my perspective it's entirely possible that the problem was always there.

I'd find it hard to believe it's the pen itself simply because the position of the error on the screen is a straight line above the S of the Samsung logo (and JuniorGG showed the exact same behavior). It certainly couldn't hurt to try another pen but unfortunately I don't have one. I'll see if I can find another one to test, even if that means just walking into Best Buy with the tablet and using their demo pen on mine.

I tested some adjustments to the sensitivity (and of course forgot exactly where it was set when I started, oops... close enough though), but unfortunately it didn't help. If I made the pen more sensitive it just was writing at all times, even when not touching the screen. Less sensitive and it still produced the distortion when it reached the same effective pressure (ie, right when it first starts writing).
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
When I borked my pen I initially thought the same thing and tried to get my device exchanged. The pen behaved differently depending on where on the screen I placed it making me think it couldn't be the pen because if it were off I'd expect it to be off consistantly.The device worked fine once I replaced the pen. Yours could certainly be the device itself but I'd still try to check out using it with a new pen before sending it in for repair.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] dale_cooper:
I get the jagged line....

Also - I don't know if my light pressure is not consistent but I have probably a 3 inch wide gap where a line doesn't even show up when I'm lightly drawing diagonally across the screen (its like this everywhere on the screen).

Whatever - you're never going to draw this lightly....
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Cocax:
Just tried this on both SNote and LectureNotes and it happens on my GN also... When I go in a diagonal line with light pressure, the lines get jagged right above the first S of the Samsung logo
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
Try turning the device updside down (Samusng logo on top) and see if you get the same result in the same place (the opposite side from the logo).

---------- Post added at 08:46 AM ---------- Previous post was at 08:29 AM ----------

How's this? If I'm not replicating what you're trying to reproduce let me know and I'll try again.

[YOUTUBE]hXTnHBDQonI[/YOUTUBE]

The last time something like this came up it was a problem only some people were having importing PDF's in S-Note. It turned out two versions (out of seven) of S-Note were borked. This could easily be a video driver problem. It might be helpful to post the ROM you guys with the problem are using.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Atomic Walrus:
I tried all 4 orientations, the "line" across the screen is always the same.

That's the right spot, but it's way too fast. At that speed the smoothing will override it. You have to keep the pressure at minimum and go very slowly. It might be easier to reproduce in photoshop with a pressure-sensitive brush because you can see if you're at that minimum pressure from the brush diameter (there's a 1px dead zone at the lowest range of pressure sensitivity), but I can do it in S-Note pretty easily too now that I know what I'm trying to reproduce.

I haven't done anything to the software on the device aside from installing the one official OTA update. The problem is reproducable in literally every app on the device, including a test involving slow-scrolling in the web browser with the pen at minimum pressure (in this case it results in a small jump of the scrolling). This afternoon I'll try dumping all my files onto a card and doing a complete reinstall just in case.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
If you've inverted the device and error is appearing in the exact same spot (over the "s") it's not the digitizer. If it were, the errors would appear under the "g" in Samsung when it's upside down. And the fact that it happens in every app is what leads me to believe it's a touch or display driver that's borked. Screen touches are registered on an X/Y axis and reported to the OS and apps reading them by one or more display drivers. Like with S-Note, the issue may only affect certain ROM's that Samsung's released. I can't replicate what you guys with issues have reported no matter which app I use, speed I draw at, or lightness of touch. If it is an issue with one or more specific ROMs that would explain why all five units JuniorGG saw behaved the same way. That's kind of good news if true because it should be corrected in the next update which will hopefully be JB.

If you look at the 35 page long "sketches" thread it's pretty hard to believe that with those folks using S-Pen so heavilly and the detail in their drawings that this wouldn't have come up sooner had it been a universal issue.

Here's the version of s/w my device is running.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Atomic Walrus:
Interesting. I would have thought that its static physical location on the screen indicated a hardware defect, but I have to admit that the nature of the defect -- that it only occurs at a very narrow range of pressure, and not with the hovering cursor at all -- would suggest a driver or software error. The traditional Wacom EM distortion (which you can see < 0.5" from the edge and is not a defect) always impacts any floating cursor (ie the cursor shown when the pen is only near the screen) and is never different based on pressure.

As I mentioned originally I went over 40 days using the tablet fairly heavily before noticing it. And because of that I don't have any way of being certain that it wasn't introduced with the OTA update. I also never saw any mention of this issue on this forum before the OTA.

I know JuniorGG has the N8000 model so I'd be interested in seeing his version numbers as well. Mine is the N8013, the wifi-only one you can get at Best Buy in the US, with the recent OTA update installed. His theory about the battery cable made sense to me until I saw a picture of the inside of the device with the cables still connected... the battery cables are diagonal, not straight from top to bottom, so they would not line up with the line of distortion.

I'm not going to bother uploading a screenshot but here's the data:

Model Number

GT-N8013

Android Version

4.0.4

Kernel Version

3.0.15-1081475

se.infra@SEP-106 #1

SMP PREEMPT Thu Sep 13 12:03:56 KST 2012

Build Number

IMM76D.N8013UEALI3
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
Maybe someone with an 8013 that's still on the original ROM could check?

Life would be great if there was only one current ROM for each device. For the N8000 and N8010 there are dozens deployed by region each with a different build date and change log. So like with the S-Note problem some ROMs might have a driver problem (if it's in fact a driver) while others don't. That would also explain why only certain people are affected. But theoretically everyone in the U.S. on the N8013 that took the update should be on the same ROM so I'd expect this issue to be repeatable. Have you factory restored your device? It might also be a rogue app causing a driver conflict.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Atomic Walrus:
Just did the reset a few minutes ago, it's still happening. Now that I know what I'm looking for it seems so obvious that I really do have a hard time believing I missed it for more than a month.

I'm kind of surprised to find that there doesn't seem to be any obvious way to revert to older versions, or just do an outright full reinstall. Coming from Apple devices which I've always heard are much more aggresively locked down I was expecting it would be a simple process to just go grab the correct official ROM and install it, but apparently I'm very wrong.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] JuniorGG:
Yes, I did not say that, but it occurs only at very light pressure. I also think that this is the reason why many do not notice it.

I also have edge distorsion like you, though I am more keen to consider consider this as a "normal feature".

To say it all, I also have a dead green subpixel (of which I couldn't care less),
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
There is using Odin. Version 1.85 is what need for the Note. You can find it via a Google search or in the dev section along with instructions. Here's the link to the original 8013 ROM. If you revert to it you'll still be able to re-update back to the current ROM or JB when it's released via Kies or OTA.

http://xdaforums.com/showthread.php?t=1847706
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] Atomic Walrus:
Intesting process, seems to have installed with no complications. Unfortunately it hasn't solved the problem. Is it 100% certain that this is the original factory-shipped version that came on the 8013?

*edit: The pen is the only remaining variable I can change myself, so I'll be trying out a different pen as soon as I can.
[Galaxy Note 10.1 Q&A, Help & Troubleshooting] BarryH_GEG:
Good question. I have a N8000 so I haven't followed the the N8013 ROMs that closely. There were three N8013 ROMs - shipping, an update that was pulled, and the update that was just released. I assumed the link I gave you was for the shipping ROM but it could have been for the pulled update too. Maybe someone with a N8013 can comment. As for the pen, when I borked mine, I would have sworn something was wrong with the digitizer by the way it behaved. BB stocks spare pens in most stores. You can always buy one and return it just to check it out.