[Q] Unresponsive touch screen - Android Software/Hacking General [Developers Only]

So I have a problem with my CUBE U30GT-H. I bought it almost 3 months ago, all have worked very well, but now touch screen doesn't.
Problem occurs when I have to unlock screen, it simply doesn't work after sleep. But when I restart it works again, tablet totally works with my mice. I tried to wipe cache and reinstall firmware, but nothing changed. So i think it will be a good option if touch screen doesn't shut down when tablet put to sleep. I was searching for a touch screen config, but didn't find. I hope you can help me with problem and give some ideas.
Now I use this firmware Evolution JB 1.0.2 ( flashmyandroid.com/forum/showthread.php?1192-Release-Evolution-JB-1-0-2-27-08-2012 )
P.S. I am new on this forum so I don't know where to put this question. sorry...

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Touch screen problem on Motorola Defy

Hello, I have recently discovered a very annoying problem with the touchscreen on my Motorola Defy:
I have noticed that the touch screen acts strange sometimes, so I have installed a touch test application(Touchtest by Hermit). In this application I have noticed that if I touch the screen in two different points in a fast succession, a line appears between these two dots. This makes a lot of application that require multitouch pretty much useless, because I have to restart the application to have the touch screen working again.
Is there any solution for this? I have heard that this may be a software issue, so I have e-mailed Motorola, but they have not answered yet.
I have attached two pictures to illustrate what I am saying, one taken before this strange error, and one after pressing on two spots very fast. You can see the line connecting the dots in the second picture. I can make a video if you still can't figure out what I am saying.
Thank you.
Im having a very similar problem here on my defy. When I play games on psx4droid and when I keep pressing x key, it stops working for a while then I have to release the button and when I press it again, it stops working and it continues
I encounter similar problems with my Defy.
When for instance using slide to unlock , 1 / 5 sildes fails. I have to slide 2 - 3 times until it unlock.
It also scrolls very slow in applications and the same thing happens when typing a message.
Solution : Unse lock button.
It currently runs Pays ROM, but the situation appeared since I installed 2.2.1.
I don't remember having this problems on 2.1.
Don't know if the situation is only related to software but it is really annoying.
Found this info regarding touchscreen slowness, but I am using the original charger so it doesn't apply for me.
Motorola Defy Touchscreen Problem
I recently got my Motorola Defy,my Defy's touchscreen acts sometimes really weird, on keyboard it's hard to enter 'r' or 'b' and some other characters, it takes little while to unlock the phone, it automatically opens applications, I don't know if it's due to faulty handset or software, I am considering it returning to Phone4U and get a replacement handset.
What version of Android are you using ?
Same problems here, but I think it is a software issue.
I'm having the same problem on my Defy.
After a while, the multi touch stops. I posted on the Motorola Forums
https://supportforums.motorola.com/thread/44733
but no response.
I used YAMTT and when having two touches, after 20 seconds, one of them disappears
This is repeatable
2.51.1 UK with 2.1 Android
Well, it is clear that this is a problem that affects many Motorola Defy users. But I wonder if someone could fix this thing?
Looks like the new software version 2.51.1 did not fix this bug. I haven't tried it yet, but I see some of you have.
So it looks like our only solution could be a developer from XDA. Could someone help please?
This is ridiculous...i've sent my phone to motorola only because it was giving this problem and basically what i think is that their own software is causing this problem so i'll be waiting for 3 weeks and when i get my defy...it'll still have that problem...Ridiculous...
I did a bit more experimenting.
I flashed the 2.2 Finnish blur, multitouch still disappears after 20 seconds using the touch testing programs
I also booted into Safe Mode (vol up + vol down during boot)
The same problem persists; I was using gallery image zoom to test.
However, I got my friend who has a Motorola Droid to install YAMTT. The multitouch lasted about 30-40 seconds. Not sure what to make of that. He's running some version of Cyanogen Mod on Android 2.3
efpob said:
I did a bit more experimenting.
I flashed the 2.2 Finnish blur, multitouch still disappears after 20 seconds using the touch testing programs
I also booted into Safe Mode (vol up + vol down during boot)
The same problem persists; I was using gallery image zoom to test.
However, I got my friend who has a Motorola Droid to install YAMTT. The multitouch lasted about 30-40 seconds. Not sure what to make of that. He's running some version of Cyanogen Mod on Android 2.3
Click to expand...
Click to collapse
Defy doesn't support cynogen mod and 2.3
I was messing around today and even the single touch disappears after a while
30 seconds or so
Mine sometime stop response after few seconds
really wierd
Tell me who is on stock rom and is having problem..because im on 2.2 leaked..so i cant really say if u hv this problem on 2.1...
I got this response from a Motorola employee. Anyone know of a way around this?
Motorola Employee said:
If you touch the screen and don't move for a long time, the screen will eventually try to ignore that touch as it'll be considered invaild. That's what you're seeing. If you continue to move your finger(s), touch will continue to work. Also, when you release the screen, it acts to clear the invalid touch region that you generated earlier.
Click to expand...
Click to collapse
https://supportforums.motorola.com/thread/44733
have simular problems............100 procent hardware problem..... if i twist phone a little it will go back to normal for a while
any ideas for disable it?changing some parameter or something?
I have the same problem. screen sometimes go crazy. i am using stockrom eclair SEA 2.59. sometimes it seems that it tap icons or part of the screen even without I actually tap on something. and it seems it affect the capacitive button under the screen. I am not touching the search button but the search box suddenly appear.
I have to push the power button and unlock the screen to make it normal.
somebody please help us. I am also having this weird problem. Touchscreen gets pressed itself not everytime but it happens very frequently. Tried everything, hard reseted too.
At least I gotta hope that its not a hardware problem as many of u are also facing this problem. Any body please confirm if flashing cm7 has helped u or any other solution.
brjshshrma said:
somebody please help us. I am also having this weird problem. Touchscreen gets pressed itself not everytime but it happens very frequently. Tried everything, hard reseted too.
At least I gotta hope that its not a hardware problem as many of u are also facing this problem. Any body please confirm if flashing cm7 has helped u or any other solution.
Click to expand...
Click to collapse
i returned my defy months ago but what you can do is, try to flash cyanogenmod on your defy...that should fix the problem.
Hi, I've registered myself just a minute ago, reading the link that efpod left here and I've remembered that I charged my Defy with a Galaxy S i9000 charger friday (I've charged it once the batery was drained later with my original charger) and today it is failing A LOT, it's really anoying.
I got Cyanogen Mod (latest) installed on my phone so that doesn't fix the problem.
I'm uncharging it with "StabilityTest - CPU / GPU Test" and when the battery drains out I'm gonna charge it with the original one, after that, I'll test it during the day and I'll leave a messege to keep you informed.

Frozen Lockscreen

Whenever I lock my device, the touchscreen becomes unresponsive. I must restart the device after I lock it every time. the lockscreen only works the first time u use it. Even if I hold down the power button, none of these work and I must do a hard shutdown. Has anyone else had this problem. I am on stock, with one firmware update, unrooted. I have the US WiFi model.
Update: I have tried a no lock app which skips the touchscreen. This works, but when the screen is unlocked no touch input is accepted.
Search for Entropy's Odin flash , and reflash.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Did You try to switch of lock screen completely in settings ?
?.............................
frozen lockscreen
That update has screwed up pen on many devices . Mine was like that too for a while . I have changed settings in stylus , disabling the pen detection , and after that when I remove pen touch does not work , when I put it back screen works again . I went back to the store and exchanged it for new device . Since I heard that samsung has pulled back that bad update , I tried to update and it is pulled back . But samsung is not doing the right thing . They should put old one as " update " so that people can fix their devices . Find and flash rooted UEALGB rom and you will be fine
I saw this behavior when battery was low. After charging it up the issue went away. This was after the update so that might've introduced the behavior. Another GN 10.1 without update doesn't do that.
troed said:
Did You try to switch of lock screen completely in settings ?
Click to expand...
Click to collapse
This does not work. When I turn the screen back on no input is registered. I am going to fully charge it now.
Ok, i seemed to have found the problem. I was on vacation for the last 3 days, and I had forgotten my S-Pen at home. On the last night I began encountering these problems. I have just gotten home and was able to test the tab with the S-Pen and it was not accepting the S-Pen input at all. I restarted the tablet, with the S-Pen in its holder this. Now everything works perfect! This was very strange but I am glad that it is working now. Thank you all for your help.

[Q] Is this a digitizer issue?

Hi all.
I have a HTC Vivid that is giving me touch problems. It hangs for about 5-10 seconds after I wake it up from sleep. During this time, screen would not respond to any touch.
I know for a fact that the problem does not lie on software side because I have tried other stock, custom roms, kernels, S-OFF/ON, bootloader, etc and the problem still existed. So the problem is..
However after 5-10 seconds have passed, touch screen works perfect. I even tested this with touchscreen-testing apps from Google Play and it concluded that there was nothing wrong with the touchscreen.
Not playing around digitizer nor LCD screen, I opened up the phone to see if I could find disconnectivity of some sort, but with no avail.
Any ideas?

[Q] Touchscreen freezing randomly - please help!

Hi, I've been using ViperS 5.1.2 for some time now on my Sensation XE, and it used to work great for me. But since a few days I've got this really annoying freezing problem and I just cannot find a solution.
The touch screen just freezes without any reason, sometimes after using the phone for half an hour, but most of the time within a few seconds after unlocking the screen. When it freezes, the screen won't respond to anything, also not on the back or home button. If I use the on/off button though, the screen will respond again for one or more seconds. This happens randomly; a lot of times I can't even unlock the screen properly, and the rest of the time I only get the screen working normal for a at most 10 seconds. This way it can take a few minutes just getting to the settings menu, for example. The phone does not report any error; after using the on/off button it just goes on where it froze. Also the phone reacts to tilting the screen. Or when playing a video, this just keeps playing normally. So it seems to be purely the screen itself...
I tried a lot to figure out what could be the cause of this problem: uninstalled a lot of recently installed or updated apps, checked the amount of free space/RAM, cleared cache, Dalvik, used nandroid backups to return to a previous (in the past good working) state, tried if removing the sd card would make any difference and finally flashed the rom again. All to no avail; the problem keeps occurring. At first, after trying out a possible solution like the ones I've mentioned, it looks like this did the trick. Sometimes the phone appears to work normal for at most half an hour. But then the problem occurs again, and will at that point occur at a high frequency.
I am out of idea's right now and am getting quite desperate. I need this phone to work properly badly, as I will go on my vacation in a few days and really need to be able to use some of my apps then. So I do hope somebody can help me out here? Any help would be greatly appreciated!
Does it do this while connected to the charger or usb.??
sent by v.konvict
v.konvict said:
Does it do this while connected to the charger or usb.??
sent by v.konvict
Click to expand...
Click to collapse
Yes, does not make any difference. I found today that the phone is now also acting strange in clockworkmod recovery touch, that's for the first time. Can't properly use the touch screen there either any more, only with hardware buttons. So now I guess this should really be a hardware issue. Maybe the phone is just dying...
Yess its a common thing for our phone to act that way while charging.... It has somtheing to do with its poor grounding. You can find threads to help u with how to solve it.
sent by v.konvict

[Completed] Having a problem with MStar S700's touch screen

So basically, around 2-3 weeks ago my phone's screen started acting up. Usually it'd take me two tries when turning the screen on to actually get the touch screen working. As in, I turned the screen off, the touch screen doesn't register any touches, then I shut the screen down and try again, and it sometimes works. Now, this didn't bother me - I though, maybe there's some short circuiting, it may fix itself. Fast forward 2 days later. my touch screen now needs minimum 3 tries to work, up to 9 or 10 sometimes. Note that when my touchscreen starts working, it works without a problem, all 5 fingers until the screen is shut down. Then I did something that COMPLETELY broke it - I restarted my phone. The touch screen never worked then. Like ever. I could try 100 times and it wouldn't work. I'd take out the battery, let it reset nice and **** - it doesn't work. So the next thing I did was a factory reset in recovery - the phone is restored to functionality before restarting it. Now, I didn't shut down my phone for 2 weeks, nor did it run out of battery - it's the same. Today, I've restarted it and the same problem occurred again - touchscreen completely unresponsive. So, I did the same thing as before, only this time I tested dalvik-cache and cache separately - none worked in any combination without a factory reset - at this point, I'm already certain the problem is in the software, and not the hardware. So, guess what - phone was restored to functionality with 2-3 tries after that reset. Then - an even more peculiar thing - I've enabled the touch gestures to turn on a screen. Most of the time when the screen turns on with a double tap, the password screen reacts to touch, but there are cases when I double tap, it opens, and then it doesn't work - it doesn't register touches. Most of the time, though, it doesn't even open the screen through the double tap. I've also noticed that it would sometimes happen when running - for an example, I play a lot of Cytus and Deemo - whenever there would be a break of more than 2 seconds between taps, if I didn't tap in between (so, when there are no beats to hit), it would sometimes completely ignore the next tap, as if the digitizer turned its touch detection off due to inactivity...
At this point, I have no idea what it is. I know that it's not the proximity sensor which I had originally suspected, and I know that the problem lies somewhere inside Android data folders or something a factory reset wipes. However, I have no idea where. My phone has been rooted and runs xposed, although I haven't used it since the reset - I wanted to flash a custom rom but found none other than Mstars 5.0 fresh install ROM. So, if anyone recognizes this problem, can I fix it with a new ROM flashed? Can I fix it by finding the **** that's causing this and always delete it at startup via script? Or should I just attempt to fix my phone in a repair shop?
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