touch input issue - Nexus 4 Q&A, Help & Troubleshooting

Hwy guys, I been having an issue with my screen where it would register a touch when there isn't actually anything.
I have pointer location turned and notice it occasionally, and when it does happen, they phone is pretty much unusable. I would have to hold the power button until it shuts down and restart it for it to go back to normal. The thing is that it happens really randomly and I can't seem to figure out what is exactly causing it. Could this be a software problem or maybe a bad ground/connection?
I'm on stock 4.2.2 with motley b42 kernel
Thanks!

Related

Screen backlight turns off while typing

Hi,
Not sure if anyone has experienced the same problem. Sometimes whilst typing away on my V1605's (HTC640) keyboard the screen's backlight would suddenly turn off but will come back on when I press any key. The time between a key been pressed and the backlight going off is very short, less than a couple of second so can't be power saving mode kicking in.
So far I have only experienced this a few times but it's annoying and does make me think whether there is a problem with my unit. Will Vodafone UK inspect or even replace my unit bacause of this. Because if happens so rarely I can't even walk into a shop to show them the problem.
TIA.
Dave.
Yeh I have the same thing on my M3100. Probably some kind of hardware/software delay, given how slow my M3100 can be at times.
I also had this strange behaviour, in order to solve that I simply disabled the keyboard sensor. Now I have the backlight of the keyboard all the time which is far from being an issue for me.
I disabled the keyboard sensor from day one so that the backlight is on all the time. I'll try enabling it to see if it fixes the problem.

problem with touchscreen

at first i want to tell djsteve my congratulations for his streakdroid 1.9.0 rom. i think it's really amazing. unfortunately now i've got a problem with the touchscreen. when i awake the phone from the standby, sometimes the screen doesn't answer to my touch. the physical buttons work, but the touchscreen is dead. it turns on, but when i touch it nothing happens. is it a problem of the rom or it phone's fault. the only way to solve the problem is to pull the battery out and restart the phone. i hope someone can help me thanks to everybody will answer my request.
I'm having the same issue with the screen becoming unresponsive during or after a call. Pulling the battery is the only known fix
I had the same problem when listening to music with the phone in my pocket. Apparently its a known fault with the phone. Something about static causing the screen to heat up and therefore making it unresponsive. My work around was to put my phone in my pocket with the screen facing outwards, instead of inwards, think the heat from my leg and the static from pocket movement froze the screen. It doesn't do it anymore, with the screen facing outwards.
asusgarb said:
at first i want to tell djsteve my congratulations for his streakdroid 1.9.0 rom. i think it's really amazing. unfortunately now i've got a problem with the touchscreen. when i awake the phone from the standby, sometimes the screen doesn't answer to my touch. the physical buttons work, but the touchscreen is dead. it turns on, but when i touch it nothing happens. is it a problem of the rom or it phone's fault. the only way to solve the problem is to pull the battery out and restart the phone. i hope someone can help me thanks to everybody will answer my request.
Click to expand...
Click to collapse
I have noticed this as well, however I just updated to the 351 rom so it's not a streakdroid problem. I think it might have something to do with AndroidAssistant app I just installed.
Recalibrate
To fix this issue usually all you need to do is recalibrate the screen by holding vol up,vol down and the power button while the phone is off and then when the text on the screen appears select screen calibration and follow the instructions after it says successful calibration wait for the menu to comeback up and scroll down to power off(you may need to select it more than once) . This problem is caused by the screen being affected by heat and sometimes after updating the screen needs to be re-calibrated so it wont be affected.
ajairola said:
To fix this issue usually all you need to do is recalibrate the screen by holding vol up,vol down and the power button while the phone is off and then when the text on the screen appears select screen calibration and follow the instructions after it says successful calibration wait for the menu to comeback up and scroll down to power off(you may need to select it more than once) . This problem is caused by the screen being affected by heat and sometimes after updating the screen needs to be re-calibrated so it wont be affected.
Click to expand...
Click to collapse
Thanks for sharing that
Do calibration!!!
ajairola said:
To fix this issue usually all you need to do is recalibrate the screen by holding vol up,vol down and the power button while the phone is off and then when the text on the screen appears select screen calibration and follow the instructions after it says successful calibration wait for the menu to comeback up and scroll down to power off(you may need to select it more than once) . This problem is caused by the screen being affected by heat and sometimes after updating the screen needs to be re-calibrated so it wont be affected.
Click to expand...
Click to collapse
worked great on my streak never had a problem again!

Screen blank on power on

I've had a problem with my E900 since I got it with regards to the screen. I was hoping Mango might fix it but it doesn't seem to have.
Sometimes if I press the power button the screen backlight comes on (i.e. screen goes from off state to powered) but there is nothing on the screen. No amount of button pressing will cause the screen to show anything.
If this happens I have to turn the device off again (backlight then goes off) and try again. Sometimes it can take 2-3 times before it turns on successfully with the lock screen.
I also have this if an incoming call attempts to wake the phone and also alarms too.
Does anyone else have this issue?
I confirm this one popping sometimes. Not that often that it becomes annoying, but nevertheless.
Did you find a solution to this problem? I am experiencing it too and it is very annoying!
I've recently inherited one as well (E900 that is).
The one I have has been dropped, the backlight powers, but no drawing on the screen.
I've disassembled and re plugged everything (bugger stripping down!) but still no luck. I've done a VolUp+Down+Cam+power hard reset, and when I plug into PC Zune says setup needs completing (so it has reformatted) but still no luck.
I cant see anything fried, and no damaged ribbons as far as I can see, any ideas?
I sold the phone a while ago, and never solved the problem. I think it's a firmware issue.
PaulMdx said:
I've had a problem with my E900 since I got it with regards to the screen. I was hoping Mango might fix it but it doesn't seem to have.
Sometimes if I press the power button the screen backlight comes on (i.e. screen goes from off state to powered) but there is nothing on the screen. No amount of button pressing will cause the screen to show anything.
If this happens I have to turn the device off again (backlight then goes off) and try again. Sometimes it can take 2-3 times before it turns on successfully with the lock screen.
I also have this if an incoming call attempts to wake the phone and also alarms too.
Does anyone else have this issue?
Click to expand...
Click to collapse
hi.
What do you mean "somethimes if I press power button"?
Is it pressed with purpose to lock the phone, press it to turn off phone (background slider shows to power off - on Mango and beyond version) or press it accidentally?
Cheers.
So, I did a phone reset. Unfortunately the issue is still present!
Sometimes when I press the power button to unlock the phone the screen is lit, but stays blank i.e. no lockscreen wallpaper, no nothing. The same happens sometimes when I get a phone call - the phone rings and vibrates, the screen is lit but stays blank.
When this happens I have to press the power button to put the phone into sleep mode and press it again to wake it up.
What I found is, when the issue occurs the screen is actually responsive. For example I can slid up and unlock the phone then I hear the unlock "pop" sound. It's just that nothing is drawn on it!
I was wondering if anyone else experienced the same behavior and found a resolution. Also I am not sure if this is a software or a hardware problem. If I could confirm it was a hardware problem I would call LG and have the phone repaired or replaced.
i have exactly the same issue as you, it gets really annoying.
i heard from someone online that the only way to resolve it is to replace the motherboard
billybrown said:
i have exactly the same issue as you, it gets really annoying.
i heard from someone online that the only way to resolve it is to replace the motherboard
Click to expand...
Click to collapse
I am pretty certain this is a hardware issue. I am calling LG tomorrow and hopefully they'll take the phone for repair/replacement.
I sent my phone for repair. Today I got it back, and guess what?!
The issue is still present! It seems, they "couldn't reproduce" or something.
What should I do now?
EDIT: If anyone is interested, here is a video I just captured which clearly demonstrates the problem. http://youtu.be/38kF9RYs_bU
I'm sending the phone back for repair tomorrow with this video attached.
Hey, might not be an issue at all, but in the video, I saw that the two times you were able to get it to go blank you had your finger on or near the proximity sensor. I wonder if there is something that could be the trigger.
Just wondering if you can duplicated it or cause it only when you have the proximity sensor blocked, or if it truely is random.
You are right, it might has something to do with the proximity/light sensor.
On the other hand, this issue occurs even on incoming calls when the phone is placed on a table, screen up and nothing around the sensor.
Today, I visited my local carrier shop and left the phone for repair again. They told me, since this is a second claim they'll run it through the process faster, so I expect to get it back next week.
Will post an update.
UPDATE: My phone was replaced. Yesterday I got a brand new unit, yeah! It was stock wp 7.0. I plugged in my sim and used the phone the whole day, no sign of blank screen issues. Last nigh I installed all the updates (total 5 I think) up to OS 7.10.8107.79, FW 1.0.16.10. Guess what?! Same issue!
I am crushed

Touchscreen weirdness

On some rare occasion, when I turn on my phone the touch screen works and it let me unlock the phone but every time I get into the home screen the touch screen stops working. When I press the home screen the home button the touch screen works again. Then I turn the phone off and on again same thing happen. Restart and it works back normally. Is this a software issue with kitkat or is this a hardware problem? I am on stock rom. I hope someone know the answer to this weirdness or maybe I don't know something. Thanks.
hfl12 said:
On some rare occasion, when I turn on my phone the touch screen works and it let me unlock the phone but every time I get into the home screen the touch screen stops working. When I press the home screen the home button the touch screen works again. Then I turn the phone off and on again same thing happen. Restart and it works back normally. Is this a software issue with kitkat or is this a hardware problem? I am on stock rom. I hope someone know the answer to this weirdness or maybe I don't know something. Thanks.
Click to expand...
Click to collapse
i get the same thing once in awhile. ever since KitKat. and i'm on a custom ROM to me its almost as if the phone is in some kind of wait state and i have to "kick" it to get it going. I've seen other in my ROM's forum talk of it. so now i know its not just our custom ROM, sounds like a KitKat thing..
Thanks. "Wait state" reminds me of finite state machine. Glad this isn't a hardware issue.

LG G2 won't tap on and laggy keyboard

Hi everyone,
I've recently started having an intermittent problem with my G2 where it won't respond to a double tap on the screen but will wake up if the power button is pressed. The screen comes on but is dim and the keyboard is laggy yet the apps seem to work ok. If I restart the phone it works fine. Sometimes this problem occurs after the phone has been on charge but other times it just happens with no obvious reason. There does not appear to be any reason for it happening and I cannot pin down what is causing it.

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