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[BUG] Home and Back button problems (phantom long press)

I've been experiencing an issue with the Home button since the day I got the device.
A few times the Recent Applications screen has popped up seemingly on its own, while I was in the middle of doing something else. At first I thought it was just a software glitch and carried on. The haptic feedback pulses twice quickly. The backlight of the Home button turns off, the backlights for the Back, Menu and Search buttons stay on, the Back, Menu, Search and Home buttons no longer respond to touch or generate haptic feedback, essentially paralyzed. It remains this way for approximately nine seconds before the Home button lights up again and the all of the shortcut buttons become responsive again, otherwise the only way to get out of the Recent Applications screen is to either cycle the power button and unlock the screen, or select one of the recent applications.
I have figured out how to reproduce this problem by pressing around with the very tip of my thumb along the seam where the glass and plastic lip meet with a little more pressure than normally necessary to register a touch. I am careful to avoid touching the normal hot zone for any button. I start from the far left corner under the search button, and make my way towards the home button little by little. Somewhere between the Menu and Search buttons when I release my thumb after pressing firmly, the haptic feedback pulses twice and the issue occurs. I can reproduce this issue anywhere along the edge on the bottom right half of the phone and about 1" up the right side of the phone, far from the Home button.
I suspect there is something wrong with the capacitive layer of my screen.
Please see if you can reproduce this or something similar on your phone, just bear in mind that you will need to press firmly (not too hard but not soft).
The unfortunate thing about this problem is that it can be activated inadvertently while gripping the phone during normal operation, interrupting whatever you are doing for the time it takes to resolve itself.
This is literally the only issue I've had with the phone in the week I've owned it and I am considering whether or not I want to play russian roulette with exchange units (and other issues like bad screens and bad weak back buttons) because everything else seems to be perfect.
Video of the issue in action here:
http://www.youtube.com/watch?v=5gqqeVbePYA

Same thing happens with me on the swap unit I got today. Bummed like no other.

Tried replicating this with my device with (thankfully) no results.

one and one... I wonder how many other phones are affected then, and how many people have it but haven't noticed yet, e.g.; "you're holding it wrong".

Hm. Just tried to replicate this on my Nexus S, no issues.

Mine did the same thing at least twice a day. However, it has not happened again since the GRH78 update. (Knock on wood).
Have your received the update?

This just happened to me for the first time about an hour ago. I have the new update too, sadly.

Yes I have the update.

I can't replicate this problem, but nonetheless, it still happens.

I have this same problem with my back button. I can't replicate it but it just randomly happens to me. I have the update and I also tried using Paul's Tom and it still happens.
Sent from my Nexus S using XDA App

This happens with my back button.
Sent from my Nexus S using XDA App

happens to mine too, also the home button. doesn't bother me too much, though. and I also have the update.

I had something even weirder tonight.
I did a factory reset, then proceeded to install everything back on when I noticed that my home key wasn't doing its job at all. Still had the haptic feedback so the input was received, but it did absolutely nothing. So I did another factory reset and that seemed to have cured the problem. My home button is working again (but i still have the other problem from time to time)

Had it happen again inadvertently today, if you notice from my video the spot where it can be activated next to the Maps icon also happens to be conveniently where your finger ends up when swiping to unlock. I was holding the phone one handed and unlocking with my thumb and it triggered the problem. Might try for an exchange this week. It shouldn't behave this way.
For those of you who are experiencing it with your Back button, does the backlight turn off for 9 seconds on your Back button?
I don't know everything about how the hardware works but I'm guessing that there is some kind of short, the controller for the capacitive layer gets confused and resets. Could explain why it takes the same amount of time to come back to normal every time. It also seems like it might be related to case/screen flex, where pressing on a part of the case bends the capacitive layer just enough to short the circuit.

This issue came on my two days old Nexus S too, but with the back button. It has happened two times now. I think that's a software issue that come along with Gingerbread. It's something like it registering a touch and sometimes the OS think it was the buttons that were pressed...

ViLANDER said:
This issue came on my two days old Nexus S too, but with the back button. It has happened two times now. I think that's a software issue that come along with Gingerbread. It's something like it registering a touch and sometimes the OS think it was the buttons that were pressed...
Click to expand...
Click to collapse
Does your back button black out for ~9 seconds?

I haven't had any button issues whatsoever since I got mine on the 24th.

No, more like two seconds.
Sent from my Nexus S using Tapatalk

selectormoldy said:
Does your back button black out for ~9 seconds?
Click to expand...
Click to collapse
No, more like two seconds.
Sent from my Nexus S using Tapatalk

Here's a new video shot today showing the issue occurring with only normal light touching:
http://www.youtube.com/watch?v=z6YFcOZwX2o
Also last night it happened while I was inserting a cable into the headphone jack.

Random Reboots.. any new info?

Hi everyone.. I searched a bit but couldn't come up with any more answers so I'm wondering if I missed something.
I've had my TF since like May, and for as long as I've had it, I've had this issue.
No matter what kernel or Rom or anything, my TF always randomly reboots ONLY when my screen is shut off and the wireless is left on. It doesn't reboot if I'm using it, and the only way to make it not happen is to turn on airplane mode when I'm done with it.
Its not a big deal, but it is annoying, especially if I leave it in the living room and forget airplane mode. Then whoever is in there gets to watch my TV constantly and randomly reboot every few minutes.
Its just more annoying than anything. Id love to just keep wifi active so it automatically connects when I turn the screen on.
Other than this, my TF has been flawless for like 6 months
Thanks if anyone has any information!

I've suffered through the same issue with my 16gb TF. By any chance do you have your pattern lockscreen turned on? Can't quite remember where, but I read that having it stops the reboots.
I tried it on mine and haven't had one since...but it's only been a day or 2. Can anyone confirm if the lockscreen stops or limits the issue?

avlon said:
I've suffered through the same issue with my 16gb TF. By any chance do you have your pattern lockscreen turned on? Can't quite remember where, but I read that having it stops the reboots.
I tried it on mine and haven't had one since...but it's only been a day or 2. Can anyone confirm if the lockscreen stops or limits the issue?
Click to expand...
Click to collapse
Wow, ill have to give this a try. I've never used the pattern lockscreen.

random reboots
I get this after about an hour of use. If I sitch it off via the button then when I press it again it reboots. If I just let th TF switch itself off (after 5 mins) it switches on normally when I press the start button.

I also had similar problems with my wife's TF, it rebooted randomly just about anytime (not just with screen off), apps crashing randomly. When I returned it to the store where I bought it, they immediately replaced it with a new one that doesn't suffer any of those problems.
If you have such problems, I'd recommend taking it back to the store for repair, because that is definitely not the expected behavior.

unfortunately the lock screen thing didn't work
Can't really take the thing back, I've had it for months.... fortunately this is the only issue I have... I can live with it. Its purely an annoyance that doesn't affect me when using it...

[Q] Screen goes partially blank

Hey, so I have this weird problem with my G Flex 2.
I got it around 40 days ago from U.S. Cellular.
I have run into this problem about three times now, and from what I can remember it always happens when I have music playing. I tap the screen on to the lock screen then let it go to sleep or turn it off myself. When I wake it back up the screen is all black except for a few millimeters on the top, where I can see some display.(*note, this doesn't happen every time)
I am able to scroll through the display but no pop up menus. Since the battery is sealed off in the back of the phone I can't use that fix, holding the power button only brings up the menu option to turn off the screen which doesn't do me much good since I can't use the screen.
If I wait for 5 minutes or so the phone will right itself, but I don't want this to be a persisting problem. I'm not sure if this problem is tied to the music playing, it hasn't happened when it isn't playing, but I play music on my phone quite often. (note* I am playing the music from my phone, not streaming)
If you need more info I'll do my best to provide it. This is all I can think of right now.
Honestly, I don't expect anyone to have a fix yet since the phone is fairly recent and not as popular. I tried looking under G3 forums since the UI is pretty much identical, but I didn't find anything.
Sorry, my post is a little wordy.
I'd appreciate any help anyone can provide. Thanks

Yes, this has happened to me twice recently too. Once the screen was completely black except for a bright white line at the very bottom, but the phone was still responsive behind the dead screen. The other time there was a distorted/ghosty notification bar showing at the top but nothing else (like what you reported). Then the problem would resolve completely and spontaneously after resuming from sleep a few times. I have the Korean model (F510S) which was a gift so I'm stuck with it - no returns or warranty available.
bonebeatz1234 also posted about a similar problem. Seems like a hardware fault?

The replacement phone screen was fine i had a different issue of over heating and had to return it . I opted to get another device the note 4. Didn't wanna go that route bit had no choice i loved the design and ui of the flex 2. I wished lg would of just ditched the 810

~~~
Hi, I encountered same problem here.
Is anyone able to send me a screen shot or a video of this problem.
As I need to use this to prove the situation and claim warranty from the seller, however I didn't take a photo or something when the problem happened to me.
please sent to [email protected] if you have the photo or video and many thanks~

Just had this problem also had a g flex 2 for about 21 days now and it happened to me after a restart in the car with a pinkish line at the top and the phone was completely responsive even though the screen was blank
I think it might have to do with heat cause I held it by the ac vent while I was reading this board on my nexus and when I looked back at the phone it was working perfectly
But I swear during my time with the phone it heated up way more than this time and this time the phone wasn't even hot
I reset the phone like 3 times before I held it to the vent and it didn't help at all
Using the att variant with android 5.1.1

Have the same problem every now and then, found a recommendation on another website and in the instruction manual to reset the phone by holding down the power button and volume down button for about 10 seconds or to turn it off by holding down the same buttons for 20 seconds. I find what works better though is to just leave the phone alone and it corrects itself within about 5 minutes.

Having this same problem. Happens once every couple of weeks. Any updates on this?

I think that this is a heat problem....everytime i left my phone in the sun, it show me this strange error.

I'm not convinced its a heat issue. I looked at my battery chart the last time it happened and it was barely over 90 deg. It seems it happens to me when it is charging PLUS doing something like streaming music or GPS is on. I need to start taking notes. I should have done that before.

this have happened to twice too. weird anomaly.

assyriska said:
I think that this is a heat problem....everytime i left my phone in the sun, it show me this strange error.
Click to expand...
Click to collapse
even you can show some errors if u stay on sun.
Inviato dal mio LG-H955 utilizzando Tapatalk

Having the same random issue. Today it happened and reboot would not fix (it usually does) finally after about 30 minutes the screen came back to normal. I now disabled lock screen in case I need to get data off the phone from pc ? in the case that the issue becomes permanent.
Sent from my LGLS996 using Tapatalk

although it's an old post, but worth to mention, that It can happen to all the LG Flex 2 models.
It is caused by a heat or inaccurate voltage. let me explain how it can happen:
heat - when you put the phone on the car's cradle under the car's front windows during a sunny day - it will happen.
voltage/heat - when you charge your phone and not using your original charger (eg chinese car chargers) - it will happen.
so what to do? I've noticed that putting the device over the cat's air conditioning , can reduce this to few minutes. also, if you can, mount your cradle over one of the air condition outlets and it will freeze your phone all the time

Nexus 5 really weird screen problem

Hi,
I have this really weird stuff going on with my Nexus 5 screen. I cracked it a couple months ago and bought a legit replacement screen for it and installed it myself (glass, lcd and frame). I fixed it with good instructions and it worked properly for two months. However though, now when I take it out of a pocket and try to turn screen on, sometimes it just doesn't light up. It's still on and every button works but the screen doesn't turn on. I have to give it a light tap or two on the back in order to make it light up again. Same thing happens sometimes when I'm using the phone normally, the screen just goes black and goes on after tapping it couple of times. Otherwise the phone works normally like it did when I bought it two years ago and after running couple of tests with screen, everything seems to work from touch interface to the graphics card.
Tried looking it up, no results.
I've noticed that the front camera doesn't work for some reason (probably just broken) and the battery lasts in use only 2-4 hours which isn't that much of an issue since I'm looking for a new phone. I just want this one to last long enough till I buy a new one.

It comes up when tapping the screen or power button? It could be a power button issue.

The screen comes back on when tapping the screen or the back of the phone. The power button isn't the issue. The screen just goes black but nothing else happens. It doesn't turn off or go to sleep mode.

Strange issue. I've never experienced it and any problems I had were related to the power button.
Could it be a loose connection inside the phone? Maybe an issue related to the proximity sensor?

Thats actually what I've thought. I have checked the phone's insides twice and didn't see loose connections, and the problem feels like it's related to proximity sensor since the screen going black happens exactly same way that when calling someone or doing something else where proximity sensor shuts the screen. It's really weird though...

Huh, I took backplate off and unscrewed the motherboard cover and took everything apart and rebuilt it and now the problem is gone. Seems like there was just some bad connection somewhere.

Glad you got it to work without having to pay someone to fix it

Backlight turns on, unable to display anything

I bought an Xperia XZs from a website called DWI Digital Cameras about a year ago (they've closed down recently due to the new GST regulations). I've had this issue since the day I received it and I thought it wasn't that big of a deal at the time, but it's gotten to a really bad point now.
The issue is that very often when I try to wake up the phone (like almost half the time) the screen does not display anything while the backlight turns on. The backlight might also flash multiple times as if it's trying to get the rest of the screen to wake up. This issue would usually go away for a bit if I either tried to open a camera app from the lockscreen (via double-pressing the power button) or rebooted the phone - the backlight would turn on and off a few times and the rest of the screen would temporarily work again. But now, it seems to be not working no matter what I try.
I'm pretty sure that there's nothing wrong with the screen itself, I even got it replaced once after I accidentally dropped and shattered it and the issue still did not go away. The issue also persists no matter what ROM I have installed as well.
Any experts on this? Cheers.