yashsingh1/xdaforums huggingface dataset:
[G2 Q&A, Help & Troubleshooting] shadowcore:
Wait, so this is the same problem as people report on the Z1?

http://johnhaller.com/blog/2014-03-06--sony-xperia-z1-z1s-touch-screen-issue

Defective by design or SoC issues?

I think its the SoC as the G2 an Z1 has the same SoC.
[G2 Q&A, Help & Troubleshooting] Immix:
No, I think we are discussing a different problem here. I had the following three issues:

1. A dead band in the upper half of the touchscreen as pointed out in this thread: http://xdaforums.com/showthread.php?t=2532226

2. Erratic touchscreen behavior with automatic swipes and touches. And I have confirmed that these swipes and touches occur in the middle of this dead band.

3. Knock on not working but knock off working.

As I pointed out earlier in this thread, I have fixed all of these issues simply by upgrading the touch firmware. Its been over 2 weeks now and the touchscreen is running without any of these issues.
[G2 Q&A, Help & Troubleshooting] renawld:
can confirm same EXACT problem, the erraticness happens even more often now because i did a hard reset while it was happening
[G2 Q&A, Help & Troubleshooting] KeirP:
This appears to be software. I was on Cloudy's G3 rom when it started happening ( I am NOT blaming the rom )

It also happened in recovery.

I did a full wipe ( including sys ) and re installed the G3 1.3 still dead spot and very erratic behavior.

Did a full wipe again and this time did Cloudy stock 2.5

Everything worked.

Wiped and installed Cloudy G3. Everything still works. It's like part of the kernel gets corrupt as I think this has to do with knock on since it's DEAD when this starts happening. Either way I tried every other work around but this seems to have worked. Just thought I'd put it out there. If your 100% stock I don't know what to tell you to do other than RMA.

** Edit - It failed the next evening. its being RMA'd.
[G2 Q&A, Help & Troubleshooting] gsaundry:
Fixed

Updating the touchscreen firmware fixed the issue (unresponsive band in the screen, knock wake not working very well) for me as well.

Don't forget to reboot afterwards.
[G2 Q&A, Help & Troubleshooting] Immix:
Update: the problems are back, only this time the phone has become virtually unusable with erratic touches happening more frequently. I have already started using another phone.
[G2 Q&A, Help & Troubleshooting] muathuchet98:
so sadly when you say that, my phone have just same and im searching for problem. lcd not problem for this?:crying:
[G2 Q&A, Help & Troubleshooting] Immix:
Yeah I was lucky for close to 50 days during which the problems had completely disappeared. LCD is definitely not the root cause.
[G2 Q&A, Help & Troubleshooting] makam43:
G2 screen slİp help me

Hi guys I have screen problem my screen slip-teeter.ıts finish later continue again everytime.

What can I do ?
[G2 Q&A, Help & Troubleshooting] muathuchet98:
perhap battery or main? electrical pulses not normal is cause for random touch. With hardware top in smartphone, i feel regrets if throw it to trash
[G2 Q&A, Help & Troubleshooting] KeirP:
Warranty repair complete

I got mine back today

- Screen defective replaced

- Software incorrect - updated.

I flashed a stock rom, I doubt it changed the rooted flag. They fixed it anyway.

Props to LG they fixed it the same day they received it, and sent it out that same day. They did ship it back ground, so it took a bit over a week.

No complains though, new screen still has the protector on it. still my back plate ( it had rub marks from my case ) so they didn't just outright replace it.
[G2 Q&A, Help & Troubleshooting] createben:
which model u have?can u check touch response reduces, if it is placed on bed or a glass top table.

ie place it on u'r bed,open quick memo and check for responses.don't touch it with u'r other hand.

another method is place it on u'r bed or glass table,go to settings-> mobile data usage and then open quick memo application an draw somthing.try this with mobile data turned off and on.please check and post results
[G2 Q&A, Help & Troubleshooting] KeirP:
Its fine it seems I can sign my name easily. Weird request?
[G2 Q&A, Help & Troubleshooting] r4Rok:
Important: The screen began jumping up & down, and it splitted in to many frames. Now the entire display has filled with tiny white & gray dotted background, as shown in the picture below. I cann't anymore see on the screen.

This happened in the recovery mode also.

But, i could manage to take a screenshot using volume down and power button, and the captured screenshot shows the normal screen.

I am now worried about the warranty, because the screen is not coming up, i cann't power off the phone or boot in to recovery or download mode.....and my phone is rooted and has CloudyG3 1.3 installed. How do i claim warranty ?

Please help.

The entire screen of my phone is like the one in screenshot.

[IMG="LG G2 Dead Screen"]http://i.imgur.com/tZKdqT8.jpg[/IMG]
[G2 Q&A, Help & Troubleshooting] createben:
Ya i know, it is weird and i am sure that LG g2 having some design issues like electrical fluctuations.it will affect touch response with different surface where conductivity is less.
[G2 Q&A, Help & Troubleshooting] KeirP:
I've actually had this with an old Acer, I could only use it in my hand. on a surface it didn't work, so I kinda got what you were asking for, but none of that, its operating very slick.

rooted with towelroot, installed flashify and installed twrp 2.7, installed cloudy in about 10 minutes.

Umm.. that sucks. I think you can get into fastboot mode through ADB if connected, in which case you can just use the tool to install the stock KDZ for your phone and send it in. That's what I did, albeit with my fingers and a screen is was much easier. I'll be of no help past that suggestion, good luck!
[G2 Q&A, Help & Troubleshooting] gentil:
It is definitely a harware failure

Searches online pointed toward a failure of the digitizer. If you enable developer mode (even unrooted phones can) and enable touches you will see what happens.

I uploaded a couple of screenshots below. There is a almost dead bar near the top of the screen.

http://imgur.com/lIcl3pZ

http://imgur.com/RX03nou

Restoring from TOT file to pristine factory firmware did not help.
[G2 Q&A, Help & Troubleshooting] Immix:
This is exactly what I have and digitizer/LCD is not the issue. I know this because I replaced the entire LCD assembly and still have this issue.
[G2 Q&A, Help & Troubleshooting] das.dian24:
Geez im facing the same problem with my Korean Variant, the dead spot at the upper area of the screen and the crazy touches that it registers.

Im only using the phone for about 16 days. Damn, should I change phone brand or something? i think i should ask for a money back :( :crying:
[G2 Q&A, Help & Troubleshooting] zdravo:
Hi guy !

I don't nkow if i've got a touch screen issue or a software...:silly:

I've got some trouble with my G2 from yesterday ! The problem appeared suddenly. My phone is not dropped.

I'm on 4.2.2 stock ROM (D802 - 10F) with stock kernel.

I don't have the words to explain my probleme so... pictures !

the last photo was taken when i make the phone off : we see that the "white remanence/lane" disapear...

So i think this is a software problem, isn't it ?

Help plz :)

:cowboy:
[G2 Q&A, Help & Troubleshooting] Rayan:
Actually you can test it even further to discard the possibility of an OS problem. If you are rooted and go to TWRP recovery, you can tell the touchscreen does not work because you can't select options right below the same area of the failed digitizer.
[G2 Q&A, Help & Troubleshooting] zdravo:
In TWRP, i've got no problem for select any options...

i think it's a remanence problem ?
[G2 Q&A, Help & Troubleshooting] Rayan:
Interesting! But could you please elaborate on the remanence problem?
[G2 Q&A, Help & Troubleshooting] vodeblog:
Touch screen is a known issue on G2. I experienced "fix" by flashing some custom Rom and kernel. I believe different voltage control to the touch panel will have different result. I'm now totally out of touch screen problem after flashing custom Rom and kernel.

Another thing is sensitivity. Sensitivity on G2 Touch panel is poor. I used to use tempered glass but found that made difficulty for the panel to response. I got everything fix now without any screen protector.
[G2 Q&A, Help & Troubleshooting] Rayan:
Interesting stuff!

Can you share with us what rom and what kernel did the trick for you?

I've never played with voltages or deep and obscure kernel tweaks but I guess it's work to try your solution.

Thanks!
[G2 Q&A, Help & Troubleshooting] Rayan:
Interesting stuff!

Can you share with us what rom and what kernel did the trick for you?

I've never played with voltages or deep and obscure kernel tweaks but I guess it's work to try your solution.

Thanks

---------- Post added at 09:53 PM ---------- Previous post was at 09:52 PM ----------

Please delete, duplicate post
[G2 Q&A, Help & Troubleshooting] vodeblog:
Yes. Cloudy Flex :)
[G2 Q&A, Help & Troubleshooting] zdravo:
I don't really if it's a remanence problem or a ghosting, or a burn-in... or a backlight problem.

It's like a "whiteout" on the screen, due to Nav Bar ?? (see photos) or icons (see photo).

My G2 perfectly works (touch screen too), but due to this problem it's very boring ! :crying:

I made a upgrade (from JB to Kitkat), but the problem is still there.

:confused::confused::confused:
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
Anyone tried the solution of installing Cloudy Flex and Bruce Kernel??? Thanks
[G2 Q&A, Help & Troubleshooting] Rayan:
I'm on Cloudy Flex but I'm having a hard time finding Bruce Kernel... Any pointers?

Thanks
[G2 Q&A, Help & Troubleshooting] wulsic:
Here ya go: http://xdaforums.com/showthread.php?t=2732648 :good:
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
Thank you, the name was change, let me know [MENTION=222842]Rayan[/MENTION] how it goes.
[G2 Q&A, Help & Troubleshooting] Rayan:
Thanks I found that post, but unfortunately that is for D802 and I'm on D801
[G2 Q&A, Help & Troubleshooting] wulsic:
[MENTION=222842]Rayan[/MENTION] ohh sorry xd I am tired... You probably used it but you could use dorimanx kernel since thats the best I know. You could also see for alternatives, render kernel simple kernel, furnace kernel and maybe also another one.
[G2 Q&A, Help & Troubleshooting] Rayan:
Don't worry Wulsic, I've tried every kernel except Bruce's without success on fixing the touchscreen problem.

Thanks anyway! :good:
[G2 Q&A, Help & Troubleshooting] federer38:
still no fix for dead spot :'(
[G2 Q&A, Help & Troubleshooting] beachmiles:
I was getting a dead spot on the bottom left of the navigation bar area mostly when the keyboard was open but sometimes not. I tried many ROM kernel combos but the 9/08 mahdi ROM and render kernel r21 seems to have fixed it. Tried dirty flashing the new mahdi rom and started seeing some missing touches, could of been a bad dirty flash

Edit- And after a week the screen is almost unusable
[G2 Q&A, Help & Troubleshooting] zdravo:
i tried last night a "burn in fix tool" but i've always got the same problem... :mad:
[G2 Q&A, Help & Troubleshooting] federer38:
Dead spot is not Rom related issue, Dead spot is also present in recovery.
[G2 Q&A, Help & Troubleshooting] Sm0k3d 0uT:
I have same issue with dead spot in recovery, it's right where I need to swipe to confirm anything
[G2 Q&A, Help & Troubleshooting] das.dian24:
Seems like I made a good decision moving on with another phone and leaving g2 permanently..

I talked with some technicians here who already handled these kind of problem..all of them tellin the same thing..

"its a common board problem of g2 caused by over sensitivity of touchscreen by the usage of knock on features"

Well i dunno if its true but I do think i made the ryt decision..

goodluck everyone.
[G2 Q&A, Help & Troubleshooting] zaakirr:
I need help friends. I own att lg g2 its already rooted and i ve deleted the att addressbook it was so annoying, but my screen is unresponsive at the middle section. Is it a hardware issue or deleting att addressbook has created some trouble. Thank u
[G2 Q&A, Help & Troubleshooting] einsteino:
please i have the same issue of deadzone and it is really fustrating. are you saying if i do a clean install of 9/08 mahdi rom and render kernel r21 it might solve the problem?
[G2 Q&A, Help & Troubleshooting] KeirP:
This is a hardware problem. If a tweak of voltages would fix it LG would simply issue a software update to fix it.

Instead they paid for shipping both ways and replaced my panel ?

Stop flashing roms and just send your phone in for repair.

To the guy that replaced his panel. Where did you get that panel from?

I've replaced 2 panels bought offline that came with dead zones .. it does happen.

The guy with the crazy white lines you flashed a rom for a standard panel instead of selecting a rom for a jdi panel or vice versa.
[G2 Q&A, Help & Troubleshooting] vulcan4d:
For those who replaced their LCD's to fix this problem can you please post where you bought it? I don't trust ebay with this matter :). Thanks
[G2 Q&A, Help & Troubleshooting] Rayan:
I don't trust eBay also... Many problems in the past.... Do you trust Amazon? I've been getting parts from them without issues.

Cheers!
[G2 Q&A, Help & Troubleshooting] chrisutpg:
Same issues..

I have been having the same issue as many in this thread. However I have 2 deads spot. One midway on screen and the VERY bottom, where the nav buttons are suppose to be.

I have been using pie control on right side of screen and disabling nav buttons since they are render useless without touch control.

In terms of everyone else suffering from these issues, if you play with LCD density you may be able to get everything to come up where you have no dead spot. That is what I did.

I am on At&t's 12 month plan with this phone and that is up in April. Not sure if I am going to bring it back to At&t for warranty or not. If anyone has any other suggestions please let me know!
[G2 Q&A, Help & Troubleshooting] Rayan:
Don't waste time, bring it in for warranty and sell it asap.

It will not fix by itself nor with a patch or tweak.

Also chances are that once you receive another replacement G2, the problem will come back.

So yeah, get it fixed and get rid of it.

That's what I'll do, it's a shame such a wonderful device to have such a poor touchscreen design, but most importantly such bad LG PR that hasn't addressed the issue.

My next device is a Nexus 6.
[G2 Q&A, Help & Troubleshooting] chrisutpg:
Well i can warranty it but can't sell it since I am on the At&t next plan. However my friend is a manager at At&t maybe they will let me switch out with a different phone. Or I might have to buy a nexus 6.
[G2 Q&A, Help & Troubleshooting] Rayan:
Nice to have somebody inside AT&T, definitely use that opportunity to switch to the wonderful Nexus 6!

Cheers!
[G2 Q&A, Help & Troubleshooting] Demontooth:
Are you sure the phone still isn't under warranty?
[G2 Q&A, Help & Troubleshooting] myabc:
please, very important question: is normal that few times the double tap in screen off doesn't work and i have to retap another 2 times for work?

this problem presents when the screen is off for more minutes....

this in d802 with every rom, even modded

thanks
[G2 Q&A, Help & Troubleshooting] zdravo:
hmm... me ?

I didn't flash (the first time i had the problem). And after i just did the upgrade -> kitkat... the problem was still here, and is still here !

I brought my phone to a repair shop for draw up an estimate. They ask me 200€... to replace the screen :silly::eek:

And when I ask more explanations, the guy say that "a layer is disconnected" but we must to change everything. :good::good:

What is your opinion ?
[G2 Q&A, Help & Troubleshooting] KeirP:
If you look in the G2 forum you'll see a post for fix for white lines I believe. The problem seems to happen when the software for a different panel ( LG used two different panels over the G2 ) putting the wrong one on appears to do this. Was pretty common for a while when it was first discovered.

However if a factory upgrade caused that to happen, talk to Warranty about it. They were awesome at helping me even being rooted and therefore technically out of warranty.

Thanks,
[G2 Q&A, Help & Troubleshooting] enzocan:
Touch screen problems

Hello everyone,

I am an Lg G2 Eur owner (Stock rom and Twrp custom recovery).

I thought about submitting to your experience my touch screen issue, that I have been facing for a few days: a vertical band at the center of the screen, not responding anymore, all of a sudden.

Add to this a few crazy ghost touches/vertical slides *inside* the dead area, from time to time.

Here's a screenshot with the unresponsive vertical band.

[IMG="screenshot"]https://dl.dropboxusercontent.com/u/15309786/IMG_20141113_003310_408.jpg[/IMG]

Did any of you deal with anything like this? Any ideas?

Btw, I'm preparing to revert to stock recovery and update the firmware, but I'm not confident it will fix that.

Thank you in advance,

Enzo
[G2 Q&A, Help & Troubleshooting] mattlport:
Sorry to hear, I had same thing happen accept , horizontal,across up top. Also looked for answers ,for few weeks before " sprint replaced it". Only thing I saw recently , i never had the opportunity to try, was "TOT to Original firmware" Maybe KDZ for you.. a few people claimed it work.. Otherwise , HARDWARE ISSUE, not software I'm convinced of. This is the reason LG has replaced many a G2, no questions, From what i Have seen through out the forums. Good luck, before one year warranty expires.
[G2 Q&A, Help & Troubleshooting] Rayan:
Whoa! This is the fist case I know with a vertical deadzone!

Unfortunately, there's nothing you can do software-wise to revert this. This is a manufacturing defect on the LG G2. Send it back if you still have warranty.

Otherwise you can purchase a full screen replacement, however chances are you will experience this problem again in the future.

Sorry dude!
[G2 Q&A, Help & Troubleshooting] enzocan:
Brought it back to service center, I suppose they will replace the glass + touch couple.

Let's see what happens.

Rayan, did you experience issues coming back after some time? I mean, if I replace a faulty part with a new one...

What makes me think is that it happened all of a sudden, it was on the desk, no shocks/water drops/temperature shocks whatsoever.

Cheers guys :good:
[G2 Q&A, Help & Troubleshooting] Rayan:
Good to know you still have warranty and sent it back!

I'm still waiting for mine to come back from warranty repairs (actually I was told I would get a refurbished version though).

I said "chances are the problem will come back" because the forums are plagued with such cases, there's people that report they are on their 7th replacement.

Some others that decided to replace the screens by themselves, also report the problem comes back after just a few weeks, months.

According to what I could notice upon inspecting my G2 (and this is only my theory) is that there is a design flaw on the G2, where the CPU/GPU heat creates a problem (possibly by heat expansion or soldering degradation) with the touchscreen contacts due to heat and proximity with each other.

I plan to ditch mine as soon as I get it back from T-Mobile.

Good luck with yours!
[G2 Q&A, Help & Troubleshooting] enzocan:
Thank you for the info Rayan, interesting theory about the design defect. I just don't get why it was a *precise* vertical band in my case, and horizontal for others. The temperature distribution should be similar in all devices.

Btw, I just got mine back from LG service. They installed a new glass + touch couple, hoping it will last :good:

Cheers everyone
[G2 Q&A, Help & Troubleshooting] Rayan:
I finally fixed it myself!

I have sort of good news!

Ok, I got my LG G2 back from T-Mobile but unfortunately they didn't want to fix or replace my LG G2 because they noticed it was tampered both on software and hardware (yes I did opened the device in my efforts to find a fix prior to send it in).

As soon as I got it from T-Mobile, I noticed that it didn't even boot! There was no OS in the device!!!

So what was left for me to do?

I followed this guide to restore to stock via KDZ and lo and behold my LG G2 is working flawlessly!!!

NO GHOST TOUCHES!

NO TOUCHSCREEN DEADZONES!

Actually, as far as I can remember, the KDZ restoration was the only thing I didn't try before. I did restore my LG G2 to factory ROM but via custom recovery backup, never through the method described on the link above!

So, anyone with touchscreen problems should try flashing back stock Jellybean firmware, then let the device upgrade to Kit Kat.

I hope this helps anyone!!!

If you need help with the KDZ flash process, please let me know and I will gladly help with anything I can!

Note: However I do feel I have lost my trust on this device that I will simply let it go soon and get something else.
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
I already try that and it didn't work ?

---------- Post added at 02:51 AM ---------- Previous post was at 02:47 AM ----------

Sometimes the problem go away and them come back again.
[G2 Q&A, Help & Troubleshooting] UD97:
I don't have warranty...

http://youtu.be/rRIv1cLVzms

I have this problem. Don't know if it's the same problem. Plus, I CAN'T change my G2 with another one.

What should I do? Is there a fix without changing the phone?
[G2 Q&A, Help & Troubleshooting] AharonBLevi:
Same problem here and dead spot also.
[G2 Q&A, Help & Troubleshooting] lemonov:
Left my phone in direct sunlight today for maybe an hour. The phone got very hot and i noticed the touchscreen was acting kinda weird. I let it cool down a little bit and later i noticed that sensitivity became worse. No dead zones or anything, i just have to press harder, put more force in every tap in order to make it work. It doesn't happen all the time, though. I tried updating the touch firmware from the hidden menu but I'm not sure if that helped at all. Any suggestions?

P.S. knock on stopped working also and knock off from the lock screen as well
[G2 Q&A, Help & Troubleshooting] Rayan:
That's what we call "ghost touches". I had that plus dead zone. I fixed mine by reflashing stock rom.
[G2 Q&A, Help & Troubleshooting] lemonov:
Fixed my own issue. Apparently the screen protector melted from being under direct sunlight for over an hour so I just took off and the sensitivity is back to normal. :)
[G2 Q&A, Help & Troubleshooting] CraviingCritic:
Might sound a bit cliche, but a little bit of percussive maintenance fixed mine.

I had unintentionally dropped my phone ~6" onto carpet, and the dead zone fixed itself. I wouldn't recommend purposely dropping your phone, though. Just sharing my experience.
[G2 Q&A, Help & Troubleshooting] jeetoobroken:
Hey Rayan,

Is it still working for you? I am frustrated and thinking of taking the plunge and follow your method.

Cheers,

JeeTooBroken