Develop Bugs

[Q] Erratic/Jumpy Multi-touch

Update: Star this Android issue if affected: http://code.google.com/p/android/issues/detail?id=58401
I'm noticing intermittent bouts of erratic multi-touch on the Nexus 7 (2013) 16GB. I exchanged one device already hoping that it was a HW defect, but my second device behaves in exactly the same way.
Chrome, Dolphin, web-view, maps (especially maps) will often jump all over the place during pinch-to-zoom. Sometimes it works fine, but too often, it jumps zoom levels erratically. Edit: This also manifests as double taps and/or "ghost taps" when using the keyboard.
I've installed YAMTT (Yet Another Multitouch test) and I've observed the touch points disappear, change direction and even suddenly register a 3rd touch. None of my other devices do this.
I'm reluctant to exchange the device yet again, but I haven't read about anyone else who's witnessed this. Am I alone in observing this behaviour?
Edit: Here is a terrible video attempting to highlight what I'm seeing in YAMTT: http://www.youtube.com/watch?v=_ZRiMiNzs0U
And another video in Google Earth (fixed): http://www.youtube.com/watch?v=14cPiiM3Pwg
Someone else experiencing the issue: http://www.youtube.com/watch?v=Xpl26UgcuSs
FINAL UPDATE: I exchanged the device again and the issue is gone (so far). My advice: if you're experiencing this issue, return it. If it continues to happen, return it again until it works.
As a side note, for those experiencing the mushy/hard to press power button, that issue was fixed for me as well.
Final Update Part 2: I am sad to say the issue is still present after all. I'll admit that it is less prevalent than with my first two N7s and the "jumps" are less severe. However, it's still there and I'm not prepared to live with it. Therefore, I am returning the device to get my money back. I'll keep up to date with this issue, and I'll likely buy it down the road when a clear resolution presents itself. I know it would be a great tablet without this problem.
To recap my experience:
First N7 had erratic multi-touch, stiff power button, keyboard and other touch screen issues. Exchanged.
Second N7 had a good power button, but the erratic multi-touch and keyboard issues were still present. Exchanged.
Third N7 had a perfect power button and no keyboard issues, but the erratic pinch to zoom was still present (though less severe). Returned.

it happen to mine while typing nothing a software update can't fix or even better custom rom

Speedy Gonzalez said:
it happen to mine while typing nothing a software update can't fix or even better custom rom
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You're probably right. I was just concerned that no one else had mentioned it. I find this behaviour quite annoying.

Does the issue go away if you actually held it with the other hand (going by video)? Sounds like the behavior of the 1st gen N7.

mi7chy said:
Does the issue go away if you actually held it with the other hand (going by video)? Sounds like the behavior of the 1st gen N7.
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I'll try that, thanks. I have the original Nexus 7 as well and never noticed this issue. Could you elaborate a little? Was the issue eventually resolved?

JayBomb999 said:
I'll try that, thanks. I have the original Nexus 7 as well and never noticed this issue. Could you elaborate a little? Was the issue eventually resolved?
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It's designed to be used on a grounded surface either held in hand or on a grounded surface. It's an electrical behavior so I doubt software would change that. Please try held in hand and report back.

JayBomb999 said:
I'm noticing intermittent bouts of erratic multi-touch on the Nexus 7 (2013) 16GB. I exchanged one device already hoping that it was a HW defect, but my second device behaves in exactly the same way.
Chrome, Dolphin, web-view, maps (especially maps) will often jump all over the place during pinch-to-zoom. Sometimes it works fine, but too often, it jumps zoom levels erratically.
I've installed YAMTT (Yet Another Multitouch test) and I've observed the touch points disappear, change direction and even suddenly register a 3rd touch. None of my other devices do this.
I'm reluctant to exchange the device yet again, but I haven't read about anyone else who's witnessed this. Am I alone in observing this behaviour?
Edit: Here is a terrible video attempting to highlight what I'm seeing in YAMTT: http://www.youtube.com/watch?v=_ZRiMiNzs0U
And another video in Google Earth: http://youtu.be/14cPiiM3Pwg
Click to expand...
Click to collapse
I've got this a little bit, glad I'm not the only one with the problem, mine only does it when I hold it above me and use it lol. Everything else is fine with mine so I'm keeping it.

Are you sure this is a software issue?
I remember back when I had an HTC Desire, it had multitouch issues but the fault lay with the digitizer and no update could fix it.

mi7chy said:
It's designed to be used on a grounded surface either held in hand or on a grounded surface. It's an electrical behavior so I doubt software would change that. Please try held in hand and report back.
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I've tried gripping in both hands, from the bottom bezel, on the table and on the couch. Still, I see this behavior. It's not constant, but it's prevalent enough that I don't know if I'm going to keep it.
It sucks because otherwise I really love it.

I dunno. I'm seeing weird anomalies with mine. Moving 2 fingers around, a random 3rd pops up.
Hopefully just software woes. The Galaxy Nexus did this, N7 did this, and now the new N7. Its rare. Haven't had a problem.
Sent from Nexus 7 FHD from XDA Premium HD

I just ran the same tests you did using YAMTT and did not have any of the same problems. I haven't noticed any mutlitouch issues either.

JayBomb999 said:
...
And another video in Google Earth (fixed): ...
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I found this thread looking for someone else who was having the problem I was - my device was doing exactly the same thing in Google Earth. Thanks for posting it!
Oddly enough now that I've found this thread, the device isn't doing that anymore. It's tracking perfectly in Earth and also in YAMTT.
It tracks fine when being held in one hand, on a grounded or not surface, when touched with one hand or two.
Very odd.

I had this issue with my 1st n7 2nd gen (which i bought yesterday). I returned it to bestbuy and got a new one which seems to be fine.

GreenXSniper said:
I had this issue with my 1st n7 2nd gen (which i bought yesterday). I returned it to bestbuy and got a new one which seems to be fine.
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I've already exchanged it once and each had this issue. I think I'm going to try again tomorrow. I'll report back.

I had a similar issue with google earth on my 1st gen N7. I can't test it anymore, tho, because its sitting at the bottom of a lake. But it would randomly zoom out or in like crazy or jump halfway across the world.

I have this issue extremely annoying. My keyboard double presses letters at times, zooming I have ttrthe problem, trying to long press a link I also get it unregistering touch
I hope this. Is. Software I don't waqmt to return this. Otherwise perfect device. You can see it happoening as I try to type

This actually happened to me for the first time about an hour ago. As said before, I hope this is a simple software bug, and not some serious hardware issue. Quite frankly, I have a feeling that going through a return is going to be messy, as I've bought mine from my local Gamestop.
From a GNex

carfreak715 said:
This actually happened to me for the first time about an hour ago. As said before, I hope this is a simple software bug, and not some serious hardware issue. Quite frankly, I have a feeling that going through a return is going to be messy, as I've bought mine from my local Gamestop.
From a GNex
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The gentlemen that posted the following video said he exchanged his device and the problem went away: http://www.youtube.com/watch?v=Xpl26UgcuSs
I know it's only one person, but this leads me to believe it might be a hardware/quality issue. I have exchanged mine once for this issue already (Best Buy) and it was extremely easy. I am going to exchange one more time and will report back my findings.

nba1341 said:
I have this issue extremely annoying. My keyboard double presses letters at times, zooming I have ttrthe problem, trying to long press a link I also get it unregistering touch
I hope this. Is. Software I don't waqmt to return this. Otherwise perfect device. You can see it happoening as I try to type
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Click to collapse
I didn't mention the keyboard issue. I too am seeing ghost taps when typing.

Hmmm. No ghost taps here. I've been on xda a lot since I got this.
Not good though. Could just be a bad batch. Seems like the dead spots would be caused by a hardware issue... Bad connections or something.
Sent from Nexus 7 FHD from XDA Premium HD

[Q] Touch Sensitivity/Response Problems?

I bought my Nexus 7 2013 32gb model from Amazon and got delivered early before official local availability. I have noticed some touch problems in various apps (Pocket, Youtube, Chrome). I turned on developer settings and then turned on "show touches". When have problems it's like the touches are never registered. It's weird because its not consistent. I am considering sending it back for a replacement, but I have a friend who picked one up locally and has similar issues. I am wondering if this is a bug in 4.3 or something like that.
Any thoughts? Anyone else have this problem? RMA or keep it?

Flashing a different kernel could fix your problem as that is what bridges hardware and software.

Username invalid said:
Flashing a different kernel could fix your problem as that is what bridges hardware and software.
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Looking to remain stock at the moment. I figure if its a kernel/software problem google will release a fix fairly soon. If it's a hardware problem unique to a small number of devices like mine then I would like to RMA it.

Liquidretro said:
Looking to remain stock at the moment. I figure if its a kernel/software problem google will release a fix fairly soon. If it's a hardware problem unique to a small number of devices like mine then I would like to RMA it.
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Yesterday mine was fine and today when I was typing in landscape I was having the biggest problem getting the letter b to go through I actually would have to hold it for a brief second.... Then I restarted... And now bbbbbbbbbbbbbbbbbb.... Yup everyone goes through I have a feeling its a software bug but I'm staying unroofed till I know for sure ...
Sent 4rm my Nexus 7 2013... It feels and looks so sexy...

I'm having the same issues in chrome. I do tons of browsing and it seems about every 20 minutes I have to close out and restart the browser session. Anybody recommend another browser in the mean time?

zim2704 said:
I'm having the same issues in chrome. I do tons of browsing and it seems about every 20 minutes I have to close out and restart the browser session. Anybody recommend another browser in the mean time?
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dolphin does the same sometimes. i like NEXT browser

the screen seems to be too insensitive imo.
i tried on my old nexus 7 and nexus 4 to keep swyping between "n" and "d" in the stock keyboard, they register all the gestures without dropping in between. However in the new nexus 7, it often drops my gesturing if i don't press on the screen hard enough.

Kind of makes me wonder if it's the calice I have on my thumb from using lighter too much
Sent 4rm my Nexus 7 FLO... Only thing missing is O.G. N7's development...

I've noticed touch issues on my otherwise flawless screen (no dust, dead pixels, or multitouch issues other than this specific scenario) due to what I assume are grounding issues. I did some testing:
If I lay the tab flat on a table, and touch it with 1 finger, touches are only registered maybe half the time.
If I touch it with 2 fingers, no issues at all.
If I'm holding the tablet in one hand and touching it with 1 finger, no issues.
If I merely touch the case (not even the screen) with one finger while the tablet is flat on a table, and touch the screen with 1 finger, no issues.
Anyone else notice this?

My keyboard inputs letters that I don't physically touch at times when I'm writing a sentence so there definitely appears to be an issue with some units at least. I've never had this same problem on any other touchscreen device.

SubMatrix said:
I've noticed touch issues on my otherwise flawless screen (no dust, dead pixels, or multitouch issues other than this specific scenario) due to what I assume are grounding issues. I did some testing:
If I lay the tab flat on a table, and touch it with 1 finger, touches are only registered maybe half the time.
If I touch it with 2 fingers, no issues at all.
If I'm holding the tablet in one hand and touching it with 1 finger, no issues.
If I merely touch the case (not even the screen) with one finger while the tablet is flat on a table, and touch the screen with 1 finger, no issues.
Anyone else notice this?
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Click to collapse
Yup, same exact situation here. I hope this is a software issue that can be fixed
Sent from my Nexus 4

Mine doesn't register touches sometimes... contemplating on exchanging.
Sent from my SPH-L720 using xda premium

dcaplinger76 said:
Mine doesn't register touches sometimes... contemplating on exchanging.
Sent from my SPH-L720 using xda premium
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Exchanging mine tomorrow.
Kills me, I had a 16gb with no issues at all, then earlier this week, exchanged for a 32gb and this one has touch issues! I also noticed right away that this 32 was noticeably more laggy due to a few milliseconds delay when I tap in one of the "bad" areas, which tends to be the top half of my screen.

Screen shaking while holding finger on touch screen

Guys please help me I've just bought my nexus 5x and yesterday I was reading some thing and scrolling and while holding my finger during the scrolling the screen is shaking rapidly as if I'm doing fast up and down scrolling and this is occurring in all apps, lock screen, settings and everywhere.

Do a factory on it. See if that fixes
Sent from my Nexus 5X using Tapatalk

msadek122 said:
Guys please help me I've just bought my nexus 5x and yesterday I was reading some thing and scrolling and while holding my finger during the scrolling the screen is shaking rapidly as if I'm doing fast up and down scrolling and this is occurring in all apps, lock screen, settings and everywhere.
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Is the charger connected?
Check out this video of my nexus 5x screen shaking, and observe the battery icon to see when the charger is connected.
Copy the link without the spaces.
https: // www .youtube. com/watch?v=dXGk8IcJjEA

jasonbiggs said:
Do a factory on it. See if that fixes
Sent from my Nexus 5X using Tapatalk
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Click to collapse
I already did but no difference.

maczh2002 said:
Is the charger connected?
Check out this video of my nexus 5x screen shaking, and observe the battery icon to see when the charger is connected.
Copy the link without the spaces.
https: // www .youtube. com/watch?v=dXGk8IcJjEA
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Yes this is the exactly happenning with me plus if unplugged and placed on the keyboard or a surfce near any electric field i guess does the same thing I don't know actually why the keyboard but this is what happens

My brother has the old nexus 5 and I tried this issue while plugged in the charger and I found it does the same thing it's shaking as our 5x

msadek122 said:
My brother has the old nexus 5 and I tried this issue while plugged in the charger and I found it does the same thing it's shaking as our 5x
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Click to collapse
Some of the provided LG sunlin charges have a fault where screen sensitivity gets worse while plugged in, maybe could be related?

But i tried other chargers but it still exists
Sent from my Nexus 5X using XDA-Developers mobile app

It happens to me too, what can we do? software or hardware?

this happen on my old gnex, makes anything typing related impossible to use. the phone still going strong until today though.

I also have this problem. Do you know a fix?
I also have this problem. Do you know a fix?

I had this problem with my old nexus 5. For the 5X which I am now using, the problem is much less that it is not noticeable normally, but the little shaking can be seen when using apps which trace the path of finger movement. Anyway it's not recommended to use the phone while charging, and there are some reports that people got electric shock doing this.

Screen Issues: Right side of screen lags

After using my Pixel daily for 6 months (got the first batch, pre December 25th) and having next to no issues with it (wifi strength sucks, even with Xceed kernel, but it's better than it was), half of my screen decided it wanted to go goofy. I was using it two days ago and everything was working fine, I used it yesterday morning for a few minutes and then plugged it into the Google charger that came with it and let it sit on my couch for a few hours while it was charging. I got on the bus, and pressed the power button to wake the screen and nothing happened. Thinking I had it turned off I held the power button for a few second, and still nothing. So I held it for 30 seconds and when it brought up the bootloader warning the right side of the screen was glitching, same thing happened on the Google logo, boot animation, and continued into Android. I powered it off, hoping it would go away but it didn't. The slight glitch then turned into static "snow" which will then change sporadically based on what I'm doing on the tablet. That area of the screen still works perfectly because touch input works, and when I take a screenshot and view that area of the screen it shows up just as it should. It seems like there is an overlay on the right side of the screen that won't go away. Since it happens from the moment you turn it on makes me think it's a hardware issue but the fact that the screen itself still works perfectly makes me think it's a software issue. I haven't flashed the stock ROM back on it yet or locked it backup yet since I don't have a type c to type a adapter with me, it's still under warranty but I wanted to see if you guys could help me fix it before I sent it back.
TL; DR

This just started happening to me today, exactly as you described.

Interesting. I just RMA'd mine, should be receiving it within the next few days.

I'm returning mine too. I've determined that it's hardware because when I applied pressure around the edges of the screen I felt something slightly pop into place and then the problem was temporarily corrected. If I apply slight pressure to parts of the screen it happens again.
At this point I've flashed back to stock and I'm in an eternal recovery bootloop that I can't fix because acquiring USB drivers that work is incomprehensively difficult.

Just had mine go as well :crying:

Oh wow, that sucks. At least I'm not the only one though. I just got my new one a few days ago and all is well so far, hopefully this one won't screw up. RMA process was very smooth.
As for the USB drivers I usually have to install them manually by using the "select driver from a list"
Sent from my Pixel C using Tapatalk

Same issue on my first one
Here's my post from the mapping problems to serial # thread.
Google RMA process was fine once I was finally able to get a chat window with them.
Be sure to post to the problem mapping thread to help others!!

Add me to the list. Just went through the RMA process and am now waiting for the replacement to come. I can deal with the wifi issue and the random reboots, but having half of your screen corrupted is unacceptable. I don't even know how this is possible unless some genius at the pixel C team decided that it's cheaper to source half a screen and glue them together.

It's kinda crazy that I couldn't find this happen anywhere then all of the sudden it's happening to you guys! I'm extremely confused how it happened and what actually went wrong with it.

brando56894 said:
It's kinda crazy that I couldn't find this happen anywhere then all of the sudden it's happening to you guys! I'm extremely confused how it happened and what actually went wrong with it.
Click to expand...
Click to collapse
Most likely some latently defective silicon from Nvidia.
Sent from my Pixel C using Tapatalk

pkelly517 said:
Most likely some latently defective silicon from Nvidia.
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Click to collapse
I don't believe so, I think it has more to do with the screen, since it would occasionally correct itself, and even when half the screen was screwed up, screenshots would come out perfectly. It's almost like there's something stuck over the right half of the screen.

brando56894 said:
I don't believe so, I think it has more to do with the screen, since it would occasionally correct itself, and even when half the screen was screwed up, screenshots would come out perfectly. It's almost like there's something stuck over the right half of the screen.
Click to expand...
Click to collapse
Of course screenshots would come out perfectly. It's just a memory dump of the video RAM. This is a problem with getting that memory to the display. I think the display driver is part of the SoC. I could be wrong. Maybe it's a cable.
But it seems like a bit in the display driver is never getting enabled.
Sent from my Nexus 5X using Tapatalk

I'm fairly certain that it's a physical issue with the screen or the connection to the screen. When I had this issue I saw a visible change when I applied some light pressure around the edges of the screen. At one point it almost felt like something popped into place and the problem went away (then resumed.) Also, if I applied some pressure on the lagging side of the screen I would see some odd behavior as if the connection was fluctuating. I didn't squeeze hard, but it didn't take much.

I have had TWO Pixel Cs do this now. The first got the dreaded half screen of death after 5 months back in May, and the replacement that Google sent me has just started doing it today after just 3 months. The second device was from a much later batch than the first.
My experience so far makes me think that all Pixel Cs might have this hardware defect - it's just a matter of time before it happens. That's kinda gutting if it's true as for me this is the best tablet out there, and I can't see anything else coming close to replacing it.
About to contact Google for RMA again I guess. Third time lucky maybe...?

Wow really? That's no good!

Pixel C Screen Issues
Add me to the list, as of this morning. 8 months old.

SpaceGooner said:
I have had TWO Pixel Cs do this now. The first got the dreaded half screen of death after 5 months back in May, and the replacement that Google sent me has just started doing it today after just 3 months. The second device was from a much later batch than the first.
My experience so far makes me think that all Pixel Cs might have this hardware defect - it's just a matter of time before it happens. That's kinda gutting if it's true as for me this is the best tablet out there, and I can't see anything else coming close to replacing it.
About to contact Google for RMA again I guess. Third time lucky maybe...?
Click to expand...
Click to collapse
what's the serial# of your replacement?

lude219 said:
what's the serial# of your replacement?
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Click to collapse
My second Pixel C's s/n is 61250***** This one has developed the screen problem on the right of the screen
The earlier one I had was 5A230***** This one had the problem on the left side of the screen
I assumed the second one was from a later production batch than the first, but must admit I don't really know that.

SpaceGooner said:
My second Pixel C's s/n is 61250***** This one has developed the screen problem on the right of the screen
The earlier one I had was 5A230***** This one had the problem on the left side of the screen
I assumed the second one was from a later production batch than the first, but must admit I don't really know that.
Click to expand...
Click to collapse
According to this http://forum.xda-developers.com/pixel-c/general/mapping-problems-to-serial-t3274660 there still seem to be some issue with the #61250 batch so I'd try for a 3rd time to see if you get a 6202000 one (what i have now). It's stupidly frustrating but the Pixel C is too good to give up now.

lude219 said:
According to this http://forum.xda-developers.com/pixel-c/general/mapping-problems-to-serial-t3274660 there still seem to be some issue with the #61250 batch so I'd try for a 3rd time to see if you get a 6202000 one (what i have now). It's stupidly frustrating but the Pixel C is too good to give up now.
Click to expand...
Click to collapse
Thanks for the info. Not sure I'll be able to determine what s/n Google sends me next time, but here's hoping I get a good one and that I've just been unlucky so far. I won't be able to RMA until I get home from vacation later in the week anyway. If they send me another Pixel C that develops the half screen problem down the line, I will surely have to get a refund and maybe go for a top end Chromebook (with Google Play of course) next time.

Screen burn in and blue tint

So I got a few days with my Pixel 2 I dont get too bad blue shift I don't think it's that annoying colors are different that Samsung Screens supposedly because they are using sRGB Color space, as you can see on my photos which are not so clear in person it looks a little bit more the screen burn of the nav bar yes it's there but so faintly and since it's basically always there I don't know how can this be bad, I really hope they get a setting for a more colorful display

maxrdlf95 said:
So I got a few days with my Pixel 2 I dont get too bad blue shift I don't think it's that annoying colors are different that Samsung Screens supposedly because they are using sRGB Color space, as you can see on my photos which are not so clear in person it looks a little bit more the screen burn of the nav bar yes it's there but so faintly and since it's basically always there I don't know how can this be bad, I really hope they get a setting for a more colorful display
Click to expand...
Click to collapse
If its the navbar that has burn in, most see it as non issue. People with ocd complain about it.

What has annoyed me I don't know if it's Android 8.1 but bluetooth audio is a pain I noticed that bluetooth also with galaxy s8+ wasn't so good when connected to car but with pixel 2 even with a close speaker is broken

maxrdlf95 said:
What has annoyed me I don't know if it's Android 8.1 but bluetooth audio is a pain I noticed that bluetooth also with galaxy s8+ wasn't so good when connected to car but with pixel 2 even with a close speaker is broken
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So it doesn't work at all? I know 8.0 BT to my car is fine on my 6p, it seems less finiky to connect than what it did on 7.1. But that was only on initial set up.
Supposed to get my pixel today

with the car If I move it a little far it stutters some times with the speaker is totally broken is a UE Megaboom

maxrdlf95 said:
with the car If I move it a little far it stutters some times with the speaker is totally broken is a UE Megaboom
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I'll check it out myself once I get my device in hand and set up, then report back.
I'll admit I haven't been following the xl2 section as much ad I do with most phones I've owned, but I don't know that I've seen other posts about the same type of BT issue.

Have you tried bluetooth audio with other devices other than a car. Does it work with an AVR (Audio/Video Receiver) or a bluetooth speaker. Does it have the same behaviour across bluetooth devices?

Something interesting I noticed yesterday...I was packing up my old pixel XL to send to Google for trade in .
Look at at screen burn in on the bottom of screen .
Sent from my Pixel 2 XL using XDA Premium HD app