Develop Bugs

[Q] Extremely weird screen behaviour.

Hello all! Ive just recently got my Xperia arc, and flashed a nightly build of CM7 on it, number 20. Everything seemed to run smoothly, but just now screen started to behave very weird, it almost seem to have osme kind of "ghostly" second touch.
The upper part of the screen is almost impossible to use, when I try select an app to move it on the screen, by holding finger down, it just flickers for a second and gets deselected. If I manage to select it and drag+hold, it starts spazing out all over the screen, with screens switching between eachother by it self.
The problem is especially noticeable in games, where you usually have a joystick controller in bottom left corner. When using it, I usually trigger the buttons above it in the upper left corner which I am no where near at with my finger.
Is this a ROM issue, or hardware issue? Ive been using the rom for couple of days with no strange to it, and now this happens. Any ideas what the source can be?

ROM failure.

Sorry for bump, but apparently the problem remained. I changed to XDA rom, which too is based on CM7 thou and after a day I stumbled upon same problem of ghotsly second touch on screen.
I cant hold to move apps, cant precisely press a button in game on left side of screen, it then triggers some other button nearby. I do get haptic feedback from long press on a homescreen, but the "add new" menu popups only every few tries Any ideas of what may be causing this? I would really like to avoid the hassle of resetting the phone and sending it back for repairs :/

try stock one or miui.

It sounds a bit like your screen had a bad encounter with water...
Could this be the case?
iR¡[email protected]!* via Tapatalk

iridaki said:
It sounds a bit like your screen had a bad encounter with water...
Could this be the case?
iR¡[email protected]!* via Tapatalk
Click to expand...
Click to collapse
No, this phone is only few days old.
I think I am noticing a pattern.. screen behaves this way only late evenings, till next morning. I never noticed the issue during the day, but then it was there again for no reason after I left phone for couple of hours (it's past midnight here at the moment). Now when I think back, same was previous two evening, issue only noticeable during late evenings. Could my phone be possessed lol?
It's quite weird issue too. Upper half of the screen seems to have a ghost touch as I said. When trying to add a widget to upper screen, I only get a haptic feedback from long press. When playing games, all buttons on left side (landscape mode) get activated as soon I press one of them. Most weird of all, is that screens works perfectly in app drawer and settings, but not in app/homescreen. I will test how it is again tomorrow and report. If it works just fine again as if nothing happened I will be really puzzled.
Currently on CM7 Xda version, same was for official version. I am considering updating to MIUI, just gotta figure this radio difference stuff, but am becoming sceptic to whether this issue really lies with ROM and not app/settings.

Yep, issue is gone like nothing happened at the morning, this is is haunted ._.

I've figured the cause, it only happens when the phone is plugged in and charging. Beats me why thou, what remains to see now is if it is tied to the kernel or not. Posting it here in case others with similar problem stumble upon the thread.

Are you using the stock charger, i used to face bit similar problem when i used to connect my old HTC USB charger... later i discover the HTC charger was giving only 500mA , where as sony one is rated at 700mA.

mangemayur said:
Are you using the stock charger, i used to face bit similar problem when i used to connect my old HTC USB charger... later i discover the HTC charger was giving only 500mA , where as sony one is rated at 700mA.
Click to expand...
Click to collapse
Thanks for the tip! Turns out it didn't like my 1000mA charger I am using for all my usb stuff, but the stock on works perfect (it's 850mA).

Xperia plays touchscreen

hey there guys and girls,
This is my first post and was just wondering about my xperia plays touchscreen. I bought it almost a year ago and since i got it the problem has been occuring. Its not major dont get me wrong but it can be really annoying when i am texting my frineds. What happens is that i will press a letter then it will just decide to press a bunch if other letters next to them. Also the keyboard will randomly go down so ill end up clicking send and completely wasting a text.
Any help would be great... Thanks xD

Large fingers? lets hope its not a digitizer problem but you did state its been happening since you got the phone. the xperia play does seem to me to be more sensitive to the amount of pressure needed or not needed; or is it just me?
Got used to using swype keyboard on my sgs and haven't used the stock keyboard on the play.
you could try to clear data for the keyboard Settings>Applications>Manage Applications>All>"keyboard"
maybe another keyboard will solve your problem entirely, there are plenty of them on the market/store.
this is just one as there are many
https://play.google.com/store/apps/...xLDEsImNvbS52bGx3cC5pbnB1dG1ldGhvZC5sYXRpbiJd
edit: forgot to mention, if you install this or any other input method you will first need to enable it in Settings>Language & keyboard>"keyboard"
just tick the box next to the keyboard and it will give you a prompt; read>OK
then say in messaging just press and hold on the text input field and select input method>select keyboard you want to use
also, when your keyboard disappears for whatever reason or doesn't show when needed you can press and hold the menu button for a few seconds to bring your keyboard up or make it go away.

I pulled off the screen protector and that seemed to fix it for me.

i've been having the exact same problem, it seems to occur mostly when my phone is charging or when it's too warm. Didn't bother sending it back though, but yes, it can be verry annoying when trying to text

Don't worry, its a standard Sony Ericsson issue. Usually occurs when the device overheats.
Reboot or look into ROM flashing and the problem will be resolved
Sent from my Xperia Play using xda premium

Mine does that when there's moisture on the screen, or when plugged into the charger. I've found typing to be much less annoying in wet conditions when using Swype.
Dry off your screen often enough and it should help. Removing the anti-shatter film (which is next to useless anyway) also makes a difference.
Sent from a parallel universe

Welcome to XDA!
Try solutions posted above.
If You ever need to test any piece of hardware on your phone, try accesing serice menu by typing this code in Dialler:
*#*#7378423#*#*
From there You can access Service tests menu and test Your Touch Screen/Earphone/Display just to mention a few.
Also screen protector isn't any good for me, standard keyboard is too small and stock firmware is to laggy to type messages. Solution is easy if You are ready to give your phone a boost by flashing it as mentioned by someone else above.

Wow, there is a great amount of different anwsers
I remember that someone on these forums said that Xplay has problems with multitouch regonizing (or something)
Basicly, the touch points wont reset unless you do something (i dont remember what)
Personaly, i just press powerbutto to "shut down" my screen, press main menu butto and open the lock, its all back to normal
EDIT: wait few seconds (like 5 or so) before you reopen the screen

i'm having a similiar problem, i charged my phone with 5v a couple times, so the last week, the touchscreen doesn't work. sometimes it does, it has been abit tricky. it like works sometimes, with an effort of constantly mashing the screen (with swipes and presses), but the last 24 hours, it's been practically dead. every other part of the phone works, like LED, pad controls, speaker, etc etc, just touchscreen is dead... any solution, methods?

Maison Looi said:
i'm having a similiar problem, i charged my phone with 5v a couple times, so the last week, the touchscreen doesn't work. sometimes it does, it has been abit tricky. it like works sometimes, with an effort of constantly mashing the screen (with swipes and presses), but the last 24 hours, it's been practically dead. every other part of the phone works, like LED, pad controls, speaker, etc etc, just touchscreen is dead... any solution, methods?
Click to expand...
Click to collapse
Broken digitizer maybe?
Sent from a parallel universe

captain67 said:
Broken digitizer maybe?
Sent from a parallel universe
Click to expand...
Click to collapse
how would one go about fixing this?

captain67 said:
Broken digitizer maybe?
Sent from a parallel universe
Click to expand...
Click to collapse
if so, replacement is easy right?
same time is, sometimes it's been working and sometimes not...

bigcez74 said:
how would one go about fixing this?
Click to expand...
Click to collapse
Honestly, I have no idea. I just know that the digitizer is what makes the touch screen work, and that there have been xda users buying them for replacement parts before.
Sent from Asgard

I have been getting this problem when coming in from outside. I can hold my finger about 1cm above the touchscreen and it will type random letters as well. Seems to be affected worse in bottom left hand corner for me. It settles back down after a while of being indoors. Its really weird though.
Sent from my R800i using Tapatalk

simacca said:
I have been getting this problem when coming in from outside. I can hold my finger about 1cm above the touchscreen and it will type random letters as well. Seems to be affected worse in bottom left hand corner for me. It settles back down after a while of being indoors. Its really weird though.
Sent from my R800i using Tapatalk
Click to expand...
Click to collapse
That's because the difference in temperature and humidity causes condensation to gather on the screen, temporarily. Capacitive touch screens work by conducting electricity, and moisture is conductive.
Sent from Asgard

captain67 said:
That's because the difference in temperature and humidity causes condensation to gather on the screen, temporarily. Capacitive touch screens work by conducting electricity, and moisture is conductive.
Sent from Asgard
Click to expand...
Click to collapse
Ahh, I see. That makes sense. I took the factory installed screen protector today as well. I'm hoping this will help too.
Sent from my R800i using Tapatalk

Heat causes the flicker on grey backgrounds

Hi everyone,
I have worked out that its heat that causes the phone to start to flicker. I put my phone in the freezer for about seconds seconds (don't advice anyone else to do this) and boom the flicker went away for a while.
So this means its not the screens which are faulty looks like a hardware design fail to me. Whats the long term effect of this on the device? Could it cause the phone to stop working? Who knows but i cant belive HTC did not catch this during testing.

evo6 said:
Hi everyone,
I have worked out that its heat that causes the phone to start to flicker. I put my phone in the freezer for about seconds seconds (don't advice anyone else to do this) and boom the flicker went away for a while.
So this means its not the screens which are faulty looks like a hardware design fail to me. Whats the long term effect of this on the device? Could it cause the phone to stop working? Who knows but i cant belive HTC did not catch this during testing.
Click to expand...
Click to collapse
I played Glowball for at least a half hour yesterday and my display didn't flicker. So it's not all of them.

mate flicker is a defect, end, my hox heats to 53deg n no flicker

Definitely not heat related, I noticed the flicker as soon as the several I've had were delivered, they were freezing at the time, as they'd been in a couriers van all day in cold weather. If anything it then became more intermittent as it warmed up.
Sent from my HTC One X using XDA

Ghost touches

Anyone else getting the ghost touch problem?
I couldn't work out what was causing this on my phone so I enabled show touches in the development menu and it shows.
It goes from 2 to 3 spots on the left hand side of the screen.
It's not a major problem but happens at least 3 times a day and won't snap out of it unless I put the phone back into sleep a couple of times.
Do you think maybe scratches on the screen cause this?
TIA

Is your phone connected to a charger when this occurs? It might be it, since im experiencing the same thing since htc desire hd.

miHah said:
Is your phone connected to a charger when this occurs? It might be it, since im experiencing the same thing since htc desire hd.
Click to expand...
Click to collapse
No. Can happen at anytime. Quite random.
It takes a few on and offs with the sleep button to stop it.
Can't get off the lock screen until it goes away because I can't move the unlock slider.
Very annoying.

I had the same problem - the first day i got my hox. With and without the charger (with charger a litte bit more often i think).
I pushed the complete left side of the screen (top) carefully and now it works well. No more ghost touches ^^.

\/\/iLLow said:
I had the same problem - the first day i got my hox. With and without the charger (with charger a litte bit more often i think).
I pushed the complete left side of the screen (top) carefully and now it works well. No more ghost touches ^^.
Click to expand...
Click to collapse
Ok. Once I pushed around the screen edges, the left side has some play and moves maybe a mm with a slight creak.
I push it in but still that little bit of play on the left side.
It's quite impossible to show the service centre the problem because its so random but now I can show them this.
Cheers.

I hope you'll get a new "perfect" hox and i'll not have the same problem later :fingers-crossed:

[Q] Xperia S: Phone unresponsive when connected to Charger/HDMI/Headphones

Hey guys,
I have some weird issues with my XS and I don't know whether they are caused by software or hardware. Here's what bothers me:
Every time I connect something to my XS like the usb cable to charge it or transfer files, an hdmi cable or even headphones my phone gets totally unresponsive. The touch buttons respond after about the tenth press and even the screen is unresponsive as hell. If I scroll through the app drawer for example, my swipe gestures are often recognized as a press so that apps are launched although I made a fluid swipe gesture. On the other hand pressing on a screen to launch some app sometimes isn't recognized at all. If I plug out the whatever cable, everything's okay again.
So, what do you think? Is this a hardware or a software issue and what should I do now?
Some background information: I already tried a factory reset and such things. My phone software is stock ics (see signature).
Regards

mister-g1 said:
Hey guys,
I have some weird issues with my XS and I don't know whether they are caused by software or hardware. Here's what bothers me:
Every time I connect something to my XS like the usb cable to charge it or transfer files, an hdmi cable or even headphones my phone gets totally unresponsive. The touch buttons respond after about the tenth press and even the screen is unresponsive as hell. If I scroll through the app drawer for example, my swipe gestures are often recognized as a press so that apps are launched although I made a fluid swipe gesture. On the other hand pressing on a screen to launch some app sometimes isn't recognized at all. If I plug out the whatever cable, everything's okay again.
So, what do you think? Is this a hardware or a software issue and what should I do now?
Some background information: I already tried a factory reset and such things. My phone software is stock ics (see signature).
Regards
Click to expand...
Click to collapse
Hmm i havent experienced that before. Try updating to .50 stock and see if it is still there. If it is try and roll back to gingerbread. This will tell you for sure if it is sofware or hardware.

I'll try that but if you say that you never experienced that before, hardware would be more suspicious.
Sent from my LT26i using xda app-developers app

Many people experienced this, i still have it.
They said its a touchscreen fault or something and its needs to get replaced by sony.
Verstuurd van mijn Xperia S met Tapatalk

Are you planning to send it in? I mean I hate this bug and it bothers me a lot, but giving away my lovely phone for a while seems a bit cruel
Can I send it directly to Sony or do I have to send it back to my vendor (amazon)?

mister-g1 said:
Are you planning to send it in? I mean I hate this bug and it bothers me a lot, but giving away my lovely phone for a while seems a bit cruel
Can I send it directly to Sony or do I have to send it back to my vendor (amazon)?
Click to expand...
Click to collapse
Guys I have the same problem. When connected to the official charger and USB cable the problem is minimal. However with a car charger or an auc jack/headphone the touchscreen is unusable.
I found this on talk.sonymobile.com (not allowed to post links as newbie.. so hIIp://talk.sonymobile.com/thread/50236
Sep 24, 2012 7:27 AM (in response to diyotama)
Re: Touch screen problem with Xperia S (LT26i) [ICS Problem?]
Hey diyotama,
The guys at Meteor Ireland that sold me the phone are sending it to Sony for repair today.
Thanks,
sobanek
PS. They've identified the problem as a battery problem (something with voltage) that's why when anything was plugged into the phone, the touch screen would lag - because it didn't have enough voltage for the touch screen, and therefore, it wouldn't recognise all my touches.
​
The problem is I've unlocked bootloader and flashed some roms, lately very satisfied with Slimbean. However there are some issues with flashing and warranties.
I wonder if sending in my phone for repairs would be wise. So I would like your advise.
Is the cause a battery related problem? Is this ROM related?
Send in the device or live with the results of flashing?

I still dislike this issue but I can live with it now.. I noticed that my touchscreen bugs mostly in the lower parts of the display. So I installed some framwork mods that allow to use my phone upside down (rotated 180° and onscreen buttons enabled). So in the end its not a big deal for me anymore because the most touches are performed in the lower section of the screen.
I also unlocked my bootloader lately. If you want to send you phone in you can relock it but maybe they find out what you've done. But in my opinion this is a clear hardware issue which hast nothing to do with unlocking or flashing. So I think they can't say that this is your fault.. Regarding the voltage theory: interesting theory but I don't think this is true.. As I said: my touchscreen works perfectly in the upper part while charging but not in the lower..

I had issues like this when I used a different charger.

Yeah thats right.. I found out that the original Sony charger delivers 1500 mA.. If my phone is connected to this charger, the effect is at least noticable.. But when I connect my phone to my 800 mA car charger, the phone feels absolutely unusable..

wut... I got tired of using a screen protector, so I took it off. Immediately I noticed the screen became unresponsive at times, and discovered it was the bottom part that was unresponsive (as @mister-g1 wrote). But it only happened when the charger or aux was connected . And then I re-applied the screen protector and the problem was completely gone! I can reproduce this in real time with the app "touch test" and record it if anyone is interested.
So it looks like I need to buy some new screen protectors..
Also, did anyone send their phone in for repair and got it fixed?

When the screen protector is altered, you must change it. Regarding that other problem, well...always use original chargers, headphones...etc. If along the way you did otherwise, well, that's the source of your problem. My advise is that from now on you must use only original chargers/headphones/etc and your phone will adapt back, it may take a while but it will do it.
TIP : Try plugging in the headphones while the screen is off. See what happens when you turn it on.
Best of luck.

skywalkerdroid said:
When the screen protector is altered, you must change it. Regarding that other problem, well...always use original chargers, headphones...etc. If along the way you did otherwise, well, that's the source of your problem. My advise is that from now on you must use only original chargers/headphones/etc and your phone will adapt back, it may take a while but it will do it.
TIP : Try plugging in the headphones while the screen is off. See what happens when you turn it on.
Best of luck.
Click to expand...
Click to collapse
I should be able to use it without screen protector.. Anyway I bought 6x screen protectors, so I have enough for a while The problem occurs with original charger and headphones, and when I plug it in when the screen is off. And even though I have used my N7 charger, that should not be a problem.
Sent from my Nexus 7

Same here.. I always used the original charger and the problem was always present.. And using another charger shouldn't be a big deal.. Thats definately a hardware issue.. Think of the yellow tint screens and so on.. Sony does not always deliver the best screens.. The Xperia SP has similar problems like shown in this video:
http://www.xperiablog.net/2013/05/17/some-xperia-sp-units-suffering-from-display-glitch/
Exact the same thing happens if I try drawing linesa while charging..