/nexus/?hl=en
7/30/13
Original Poster
Jason L @gmail

Nexus 7 (2013) erratic touchscreen & keyboard

I picked up my new N7 on Friday. At first the keyboard seemed okay, though it would occasionally register double presses on the keyboard.  Now it has gotten progressively worse and the keyboard getting very erratic.  It is frequently registering double taps, and often ghost taps in areas not anywhere near where I'm touching on the keyboard.  It's almost to the point where it is unusable.

Is this a hardware issue and should I try and exchange it, or is this a firmware issue that is known and will be fixed?
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All Replies (998)
jdavet
7/31/13
jdavet
I have the same issue. Along with this, I have had multitouch issues (pinching to zoom in apps like Maps, etc). I've used some touchscreen test apps and "ghost" touches would appear randomly.
Google user
7/31/13
Google user
Same here. I'm on my second one... Returned the 16gb one and am now having the same problem with a 32gb one. Perhaps the problem is with our fingers and not the devices.
Google user
7/31/13
Google user
Same here. I'm on my second one... Returned the 16gb one and am now having the same problem with a 32gb one. Perhaps the problem is with our fingers and not the devices.
7/31/13
Original Poster
Jason L @gmail
Highly doubtful.  My original Nexus 7 (2012) didn't do this, nor did my Gnex or any of my previous iPhones or iPad.  In fact I still have the original N7 (haven't sold it yet), and I put 4.3 on it and I'm not having this problem on that device.

This is clearly an issue with the new 2013 Nexus 7.  The question is, is this a hardware issue with the digitizer or a calibration problem in the firmware.

On Tuesday, July 30, 2013 6:44:40 PM UTC-7, Roger Masson wrote:
 Perhaps the problem is with our fingers and not the devices.
paulw
7/31/13
paulw
Thanks for your reports everyone. Try starting your Nexus 7 in safe mode (instructions and info here) to test if any app you've installed is causing the problem. If you don't experience the problem while in safe mode that's a good indication that an app you've installed is the source of your issue.

If it does continue to display this behavior even in safe mode, please let us know.
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Noah Foreman
9/16/13
Noah Foreman
@Frozenthunder Sorry, I forget I am not on XDA sometimes.  They have been using the term grounding to describe a issue with the device acting differently when it is insulated from person/charger contact as opposed when when a person is touching it or it is being charged.

When I say grounded, I am speaking of the relation of the tablet to any source of corded power or physical contact with myself.  The single touch issues I was having would not appear if the tablet was charging or if I was holding it in my hand or if I had it placed on my lap.  Somehow that makes a difference to the way the touchscreen responds.

Now, if I have the tablet on a table (not charging) or laying flat on my bed (not charging), then the screen misses a ton of single touches (50%+).  It's almost as if some residual charge is not completing a circuit that is completed when the device is held.  Heck, I could have it on the desk or bed and touch a finger of my left hand to the back casing on the N7 and then try single touches with my right and everything worked again.

Again, this was on 15Q, and was alleviated by ts10.  It seems to be something in the way the sensitivity is set in the driver on mine.

And these results were easily reproducible on my unit and 3 others I tried.  Held/resting on lap/charging = fine.  On desk or on bed = 50%+ missed single touches.
 

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