Database Users

Touch screen sensitivity issues

Wondering if anyone else has had issues with the touchscreen sensitivity. Occasionally my screen freaks out: swype grabs all the wrong letters, drawing a jagged line instead of a smooth one; the unlock screen refuses to recognize my presses, or jumps all over the place. Other times it just won't respond. I've already started an exchange process, but I'm curious if anyone else is having this issue.
Oh, it happens whether rooted or not, custom rom or not. Right now I'm 100% stock for the exchange.
Also, my search of the forum found nothing.
Thanks.
Sent from my SPH-D700 using XDA App

I tested with the multi touch visualization tool, and sure enough, the screen registers touches that aren't there, and the test jumps all over the screen regardless vb off how still I hold.
Sent from my SPH-D700 using XDA App

The only thing that I could think of is that at some moment, your CPU is becoming very busy and not registering inputs correctly. However, I haven't noticed the symptoms you are describing. Sounds like the digitizer is not working properly.

I thought that might be the case. On your post, I restarted my phone when the symptoms started. No dice.
I called Sprint, and have a replacement on the way.
Sent from my SPH-D700 using XDA App

Good deal, hope your new one responds normally.

my touch recognition was going crazy when I plugged my phone to charge thru some cheap usb charger from ebay, it has the same specs (5v 1a) as my HTC charger which worked fine on Epic. So that was weird.

DiNoise said:
my touch recognition was going crazy when I plugged my phone to charge thru some cheap usb charger from ebay, it has the same specs (5v 1a) as my HTC charger which worked fine on Epic. So that was weird.
Click to expand...
Click to collapse
I isolated the behavior while the phone is charging. It's really bad on the cheap charger, but still happens on the Samsung stock charger - with both phones.
I'm at a loss now. I can't use my phone while it's plugged in.

Yes, I have the same problem and it only happens when i have it charging. It becomes useless because it completely ignores all touches.

I also deduced my touchscreen issues to it solely happening when the phone is plugged in. It seems to be some sort of grounding issue; having two different grounds when the phone is plugged in. This is a big no-no.

[Q] LOL... battery charges only if the phone is face down or standing on its side

since a few days ago the battery charging symbol and the front led will only activate if one of these following conditions is met.
the phone is standing vertically on its side or if it is face down.
if i try to (slowly or fast ) turn the phone on its back (face up) then both
the charging symbol and front LED switches off and the battery stop charging.
it seems like a sensor issue and so i recalibrate but no joy... i check with a virus checker too. no viruses
LOL
can any one help
i have a HTC HERO G2 touch...... sorry i got to update my thingy down there
thanks

have you tried re-calibrating your battery?
Sent from my HTC Hero using XDA App

i really cant get ma head around what has recalibrating the battery has to
do with the position that the phone has to be in before the battery begin to
charge.
the battery is fine, i still easily get a full days use out of it and thats with meebo running four accounts all day with intermittent talking / calling, mailing, sms and listening music.
it seems to me to be a sensor issue but hey i could be wrong
has anyone experience this or can help, is this a hardware or software issue
Thanks

Sorry was just my first thought when i read your post, i just cant think that a sensor would be causing your problem. perhaps it has to do with the connection between the phone and the charger? :/
Hero with Sense 2.3

ill keep scratching ma head on this till i can figure it out.
however thanks for your input much appreciated

Youre welcome, hope you can get it sorted. have a good long search on google, theres always something . Good luck!
Hero with Sense 2.3

I might be your wire (the bit that goes into the USB port into your phone), had problems with laptops which only charged in certain positions too. It could also be the inside e.g. if you dropped the phone or got it wet. For starters Try another USB wire if you have one and see how it goes.

k0zmic thanks
it turned out to be my power supply a friend brought over his one, plugged
it in and lo and behold the indicators worked as expected.
thanks for the tips

No problem.

[Q] Touch and charger.

Hey guys,
A friend of mine recently bought this tablet and everything was running very very smooth, until he received the OTA to 3.1 . Besides the wifi bug ( very easy to get rid of ), he is now experiencing a really really weird touch lag. Let me explain: as soon as he plugs the tablet in the charger the touch gets really unresponsive forcing him to slide/touch several times before the tablet detects the input even if the system keeps working as it should, ie no slowdowns etc.
Funny things is this bug only shows up (for now) when he plugs the charger in university while not happening at home.
Has anyone experienced the same? Im starting to think that the charger plug has a defect and is in some way affecting the touch system ( electric\magnetic stuff ) leading this to an hardware related problem, but I want to be sure so maybe we will try to flash something (Are there Acer tools to flash full stock roms?). Tablet is running original rom and recovery, I just messed with the wpa_supplicant files but I dont see how this could be related.
Thanks in advance guys

When my screen is off and I turn it back on when I switch from charger to battery I get laggie for a minute. Same on my notebook and my cell.I believe its to do with changing some power profiles/settings. If you recover in a minute or so its prob fine. If not watch running apps. If you see something running all the time.use a freeze program to trouble shoot if its a rouge app.
Hope this helps to troubleshoot your isssue
If im wrong with this information please just give your correct response to the open. Do not bash my openion.thanks

saw one other thread with similar problem...
http://forum.xda-developers.com/showthread.php?t=1166209
~~~~~

110 volts
I live in indiana.
When you plug your charger in the fram becomes hot. 110 volts to earth. Just check it, can't be good.

shaun298 said:
I live in indiana.
When you plug your charger in the fram becomes hot. 110 volts to earth. Just check it, can't be good.
Click to expand...
Click to collapse
Fram? 110 volts? What are you talking about?
More details - please. "110 volts to earth"? Not making much sense.

My guess, and its just a guess, is that his charger is somewhat faulty and not regulating the power correctly. Ask him if he plugs straight to the wall at university and into a power strip/surge protector at home. If he is, then I would imagine that the power strip is regulating the voltage enough to let the charger work, where the wall outlet is making the charger fail. I'd try a new charger if one is available and see if that fixes the issue...or take a surge protector with him to university and see if that also takes care of it. If he isn't using a power strip at either place, then we are back at square one.

Have you tried going back to an unmodded system to see if that works? (by that I mean remove/undo wpa supplicant).
I have no idea what that problem could be as it seems hardware based by just reading what you typed, but it could be software too which is called into question by the little mod you did.
What I find odd is that it works in one place and not another.
Does it happen when Wifi is off completely? (Just asking because I'm thinking if it has to do with the wifi mod you made, perhaps turning Wifi off and testing would show up something).
I'll just tell you what I would try in that situation.
1. Go back to a stock ROM, fully. No mods, no root, no hacks. Preferably one designed for your region. (We have no idea if any of the hardware in these units is different based on region, which is why I never recommend putting a ROM on the device unless it's 100% certified to be originated from a device purchased within that region).
2. Factory reset. (It doesn't fix everything, but it fixes most software glitches - especially when they're caused by outside sources like apps or settings mess ups).
If it still happens after that then you've at least ruled out all software suspects.

The frame of the a500 is hot. The charger is none polorized so makes no difference which way you plug it into the wall or extention plug is the same. Check your charger to earth and you will see line voltage no mater where it's pluged in, and don't have to be pluged into the a500. They need replaced. Just meter from the outside of the charger plug to ground and you will see the problem. Might not be on all chargers, but I would check mine.

Just check you charger plug to earth without the a500 pluged in, the problem is not in the unit or software just the charger.

teuz said:
Hey guys,
A friend of mine recently bought this tablet and everything was running very very smooth, until he received the OTA to 3.1 . Besides the wifi bug ( very easy to get rid of ), he is now experiencing a really really weird touch lag. Let me explain: as soon as he plugs the tablet in the charger the touch gets really unresponsive forcing him to slide/touch several times before the tablet detects the input even if the system keeps working as it should, ie no slowdowns etc.
Funny things is this bug only shows up (for now) when he plugs the charger in university while not happening at home.
Has anyone experienced the same? Im starting to think that the charger plug has a defect and is in some way affecting the touch system ( electric\magnetic stuff ) leading this to an hardware related problem, but I want to be sure so maybe we will try to flash something (Are there Acer tools to flash full stock roms?). Tablet is running original rom and recovery, I just messed with the wpa_supplicant files but I dont see how this could be related.
Thanks in advance guys
Click to expand...
Click to collapse
I had an issue like this with a palm pre, and the only solution i could determine was that i was using an offbrand charger that wasn't supplying the right voltage/amperage and causing flakiness with the electrical charge on the screen. maybe the charger is damaged, or they're using an off-brand one?

Ty guys and sorry for the late reply. Yeah I was thinking about reverting back to the stock system but unfortunately I'm not very familiar with the tablet scene not having one and since he is a little frustrated atm about his situation maybe flashing a recovery to flash a stock rom isnt really the way to go. Isn't Acer delivering any tool to flash a full rom just to try if that will solve the problem?
Thanks again!

So wait someone is getting 110v from ground to the metal frame of the tablet?
Sent from my A500 using XDA Premium App

Same issue
I found this thread, and this is exactly what's happening to my tablet. When it's plugged in, the screen becomes very unresponsive, and it's very annoying. I can't charge it and use it at the same time. It's not even like galaxy tab 10.1 or ipad 2 where the battery life lasts like 10 hours! I am extremely frustrated about this issue..Mine has this issue at home. I don't bring charger to school, so I don't know about that. I'm really surprised that only very few people actually have this issue..

electrical grounding no good

Anyone has a solution to this?? Should I buy a new charger? I don't want to just waste money if it's not gonna fix the problem.
Thanks.

I had a similar experience to all of this when I was recently travelling by airplane. There were charging outlets (US-style 2-prong) on the back of each seat and my tablet absolutely REFUSED to respond properly to touch when I plugged it in. At the airport, in the hotel, at home, and everywhere else I've used it, it worked properly.
My conclusion: touch screens on A500 are very sensitive to electrical problems. I suspect that an airplane's electrical system isn't as "standard" as everywhere else, and whatever the difference was (a grounding issue, or a voltage regulation issue, or whatever) caused the touchscreen to freeze.
My suggestion to the poster and others with "when I plug in the touch screen stops working": go to another location (i.e., a friend's house, work, school, a coffee shop, etc.), plug in and see if the same problem happens. If it does, it might be your charger, so try someone else's A500 charger at a bunch of locations and see if the the same problem occurs.
I would guess that most people with this problem (not the "when I plug it in it gets for a few seconds" problem, but the "touch screen doesn't work when plugged in" problem) will find a solution lies in their power source, not the A500 itself.

BigWheeler said:
I had a similar experience to all of this when I was recently travelling by airplane. There were charging outlets (US-style 2-prong) on the back of each seat and my tablet absolutely REFUSED to respond properly to touch when I plugged it in. At the airport, in the hotel, at home, and everywhere else I've used it, it worked properly.
My conclusion: touch screens on A500 are very sensitive to electrical problems. I suspect that an airplane's electrical system isn't as "standard" as everywhere else, and whatever the difference was (a grounding issue, or a voltage regulation issue, or whatever) caused the touchscreen to freeze.
My suggestion to the poster and others with "when I plug in the touch screen stops working": go to another location (i.e., a friend's house, work, school, a coffee shop, etc.), plug in and see if the same problem happens. If it does, it might be your charger, so try someone else's A500 charger at a bunch of locations and see if the the same problem occurs.
I would guess that most people with this problem (not the "when I plug it in it gets for a few seconds" problem, but the "touch screen doesn't work when plugged in" problem) will find a solution lies in their power source, not the A500 itself.
Click to expand...
Click to collapse
Thanks for your suggestion. I'm actually moving to a new home tomorrow, so I'll try the new power outlet. Hope it won't have problems like right now..

Touch Screen doesn't work on airplanes.
sw6lee said:
Thanks for your suggestion. I'm actually moving to a new home tomorrow, so I'll try the new power outlet. Hope it won't have problems like right now..
Click to expand...
Click to collapse
I have run into another problem related to touch screens - mine doesn't work on airplanes. I think that there is some sort of pressure differential issue - the screen works fine on the ground, but once I open the tablet when the plane is at altitude, the screen just stops working - it doesn't matter if the tablet is plugged in or not.
Annoying to say the least. Last night I pulled out my wireless mouse to use the tablet, and a stewardess noticed this and told me to put it away as wireless devices aren't allowed on airplanes.......
Any suggestions?

Screen insensitive to touch on the botton right corner during charging

Hi, I have got the Note for a few weeks now and loving it to death.
However, I have found an irritating problem. The screen becomes insensitive at the bottom right corner during charging, which became apparent to me when I had a hard time swiping the notification bar back up.
I have done the touch test by pressing *#0*# to confirm the problem and it only occurs when connected to a usb cable during charging and only with the fingers and not the S-pen.
I am wondering if it's my Note that is faulty or can someone verify that its happening on their Note too by doing the touch test?
Thank you.

mojojojo811 said:
Hi, I have got the Note for a few weeks now and loving it to death.
However, I have found an irritating problem. The screen becomes insensitive at the bottom right corner during charging, which became apparent to me when I had a hard time swiping the notification bar back up.
I have done the touch test by pressing *#0*# to confirm the problem and it only occurs when connected to a usb cable during charging and only with the fingers and not the S-pen.
I am wondering if it's my Note that is faulty or can someone verify that its happening on their Note too by doing the touch test?
Thank you.
Click to expand...
Click to collapse
Are you using the stock charger? My GSII screen would go nuts when hooked up to a charger I bought at WalMart.

mojojojo811 said:
Hi, I have got the Note for a few weeks now and loving it to death.
However, I have found an irritating problem. The screen becomes insensitive at the bottom right corner during charging, which became apparent to me when I had a hard time swiping the notification bar back up.
I have done the touch test by pressing *#0*# to confirm the problem and it only occurs when connected to a usb cable during charging and only with the fingers and not the S-pen.
I am wondering if it's my Note that is faulty or can someone verify that its happening on their Note too by doing the touch test?
Thank you.
Click to expand...
Click to collapse
Just got mine, and it was working fine until the KL7 OTA update. Now, when charge is low (below 30%) the bottom right 1/8th of the screen will only respond to pen touches, doesn't matter if it's charging, or plugged into USB.
When the battery gets about 35%, and no USB connection, it'll accept finger input. Plug the USB cable back in, and that area goes dead to finger input again.
I'm using the supplied USB cable, tried also using cables from my SGS1 and SGS2, and chargers from the SGS1, SGS2, original Tab, and Tab 8.9 chargers. Problem persists.
This happened totally stock, unrooted. Did a factory reset and flashed KL7 using Odin, but it didn't help.
I'm in the process of downloading KL3 as I type this, once that's done I'm going to flash it, see if it's still a problem.
If that doesn't fix things, I'm suspecting that it's a battery voltage issue, which may be fixed with a new battery, or a good clean charge.
I'd return it, but it's gray market imported.

davidusr said:
Are you using the stock charger? My GSII screen would go nuts when hooked up to a charger I bought at WalMart.
Click to expand...
Click to collapse
Various, including stock and straight out from the pc usb port. Same outcome.

No change with KL3. Pretty sure now it's a battery or shielding issue, and livable.

mojojojo811 said:
The screen becomes insensitive at the bottom right corner during charging, which became apparent to me when I had a hard time swiping the notification bar back up.
I am wondering if it's my Note that is faulty or can someone verify that its happening on their Note too by doing the touch test?
Thank you.
Click to expand...
Click to collapse
No, your note is not faulty. It depends on which charger are u using.
When i use Galaxy s+'s charger, it behaves exactly what have you describe. but when connected to note's charger, no insensitivity whatsoever.
And strange part is, some user experiencing reverse effect......
Check out this post :
http://forum.xda-developers.com/showthread.php?t=1406956

I'm have having the same problem. It doesn't matter which charger I'm plugged into, or into my computer, the screen becomes kind of strange, and the keyboard becomes very insensitive.

anyone found a solution ?
right corner problem still the sme after i flash abyss kernel 4.2 anyone help?

I had exactly the same problem when it was on gingerbread. I went to samsung service center and they replaced the display. Dont ask me the logic behind it. But i have no problems after that. May be its a hardware fault.
Sent from my GT-N7000 using xda premium

I have returned my first SGN to the shop due to this problem. It may not respond at all around bottom right conner when laid horizontally. This is not depending on plugging to charger and make the shop accepted my return.
My new SGN from other shop still has blinded area on bottom right corner but not too big like the first SGN. I think this may be normal for SGN.
Sent from my GT-N7000

My note and galaxy s did this with cheap chargers or USB cables plugged into a wall charger with USB that were off Ebay.
Switch to a Samsung, motorola or Nokia micro USB charger.

[Q] New screen/digitizer, now nothing happens

I replaced the screen and digitizer but when I tried to power up, nothing happens. I thought it was a low battery issue so I left it charge overnight. Still nothing. I put this battery into another Nexus 7 to see if it is a battery problem. That Nexus booted up and shows the battery at 100%. So the battery did charge as it should. I tried putting the battery from the second Nexus into the first Nexus and It does nothing. I have checked all of my connections several times and everything seems to be fine. It did power up before I replaced the screen and digitizer.Any ideas?

haymeadowfield said:
I replaced the screen and digitizer but when I tried to power up, nothing happens. I thought it was a low battery issue so I left it charge overnight. Still nothing. I put this battery into another Nexus 7 to see if it is a battery problem. That Nexus booted up and shows the battery at 100%. So the battery did charge as it should. I tried putting the battery from the second Nexus into the first Nexus and It does nothing. I have checked all of my connections several times and everything seems to be fine. It did power up before I replaced the screen and digitizer.Any ideas?
Click to expand...
Click to collapse
This might be a hike but try using the old digitizer. It's very possible you have a bad digitizer since the battery charged full.

I tossed the old screen and digitizer already.

Its possible it has turned on but the screen isn't working try plugging into a computer and see if it recognises anything
Sent from my Nexus 7

Plugged into my laptop and nothing happens.

haymeadowfield said:
Plugged into my laptop and nothing happens.
Click to expand...
Click to collapse
OK if you have two nexus try swapping the motherboard over try not to bend the springs on the mb for the circuits on the back they are made of phosphor bronze and break easily
Sent from my C5303 using XDA Free mobile app

That's going to be my week-end project. The "good" N7 is one I use every day.

One thing I would like to add. When I was charging the battery, I did not have the back cover on completely and I could faintly a voice saying "alert". When I snapped the cover back on I could no longer hear it and it charged. Does that "alert" mean anything?

haymeadowfield said:
One thing I would like to add. When I was charging the battery, I did not have the back cover on completely and I could faintly a voice saying "alert". When I snapped the cover back on I could no longer hear it and it charged. Does that "alert" mean anything?
Click to expand...
Click to collapse
I've never heard of that before. The nexus should function without the back although WiFi NFC and Bluetooth won't work as the antenna's are attached to the back
Sent from my C5303 using XDA Free mobile app

I did get my laptop to recognize the N7.
I got a new LCD flex cable and still nothing.
I put the new S/D into my working N7 and all I get is a screen that is half black on left side and half on right side looks like the backlight is on and nothing else. So is the S/D defective?

haymeadowfield said:
I did get my laptop to recognize the N7.
I got a new LCD flex cable and still nothing.
I put the new S/D into my working N7 and all I get is a screen that is half black on left side and half on right side looks like the backlight is on and nothing else. So is the S/D defective?
Click to expand...
Click to collapse
Sounds like the screen/digitizer is defective. Return it for a refund or exchange.
deltatux