Replacement touchscreen calibration problem on Android
I had to replace the digitizer on my C9J7 dual boot tablet. After finishing the calibration of the values was way off. I could fix it quite easily in Windows 8.1 through the calibration tool, but under Android 4.4 I can't find a way to do the calibration.
Currently Android places the touches in a small top left area of the screen, even if I touch the lower right corner. I tried using and IDC file, did not help, apparently you can't set the calibration parameters there at all.
Code:
dumpsys input
shows that both axes have set a max value of 4096 which is probably wrong and causes the problem.
Any ideas on how to solve this? Can I somehow adjust the values in the driver or anywhere else?
Thanks in advance for any help.
Hello, do you remember the cable code of this digitizer?
Related
I just replaced a screen in a Trinity (Dopod D810). The touchscreen initially wasn't calibrated correctly so I ran the alignment tool in the settings, and after a few attempts, I calibrated it properly and the touchscreen was working perfectly. Now the touchscreen is not working properly. The top half of the screen responds to touch, but no matter where I press in that region, the screen thinks I'm pressing the top-right corner. When I run the alignment again, it responds to all the touchpoints but it never successfully calibrates and it keeps bringing me back to the alignment screen.
The current settings in the registry entry for touch calibration are as follows:
484,558 244,286 263,815 750,820 707,295
I've found a few other threads here (the most helpful being http://forum.xda-developers.com/showthread.php?t=355010) and I've tried the settings from that thread. The screen seems more responsive, but still not correct because the bottom half hardly responds and the top half seems to respond when it feels like it.
Can someone please post their D810 touchscreen settings so I can try it? I've tried the settings from my Touch Cruise, but the screen is still doing weird things.
This is a customer's phone so I need to have this fixed ASAP.
I'm thinking that it may be a faulty digitizer, but that won't explain why it worked perfectly when I first calibrated it.
UPDATE: NOT FIXED yet, but now the backlight is dead. I just turned it off, and then turned it on again, but I can only see the screen content if I shine a torch onto the screen. The LCD hasn't leaked. The backlight just died and the connectors in the phone are fine. Perhaps this was a dodgy screen.
Any ideas?!
since the device has a recessed screen, take the cover off to get at it.
take a soft cloth or something and clean off all the garbage on the digitizer and back of the plastic. make sure everything around the lcd is free of dirt.
usually, if there is something pushing down on the digitizer while you calibrate it, it will totally bork the alignment over the course of 10 minutes to an hour.
my kaiser is currently having this issue, though i put it though alot more hell then i should have... so i suspect its suffering from other issues.
After replacing my digitizer, I needed to align my screen because it was off. It worked the first time, but later I had to readjust the plug of my digitizer into the motherboard. Now I need to re-align it again because it is again about 2-3cm off. When I go to the align screen page, it just loops. There are many threads on how to skip this page and stuff, but I NEED to re-align my screen and it will not. Please help.
For some reason the right side of the screen is more off than the left side, which is less unaligned, but still difficult to type with
does no one have any idea what can be done? Is there any 3rd party software that will allow me to align my screen?
Or can someone give me the calibration number that are in the registy? Perhaps I can mess with those.
Can someone please check their registry for the calibration numbers?
They are located at HKEY_LOCAL_MACHINE\Hardware\Devicemap\Touch\CalibrationData
Thanks.
HKLM\\HARDWARE\DEVICEMAP\TOUCH\CalibrationData
510,545 186,875 179,208 836,206 830,883
did you solve this? I have the same problem
Hello folks, I just replaced my LCD screen on my GT-P1000 galaxy tab, since the old one cracked but now there are weird lines on the streen, if i go into boot mode pressing volume and power the streen is white with lines all over I took an image but can't post it. My sytem isn't bricked as I can hear it loading and I know the screen slide works because it still has the alarm set from before I took the screen out.
I've checked all of the threads I could before coming here and I'm surprised I can't find anything. long story short and sorry if I didn't find it i know i'm a n00b but please HELP!!!!
No ideas at all? could it be a hardware issue, I'm hoping not because I just bought it.
Check if you have replaced the lcd correctly. and i hope you have not set some impossible lcd density like 2000. however, then bootloops should occur.
gogol1996 said:
Check if you have replaced the lcd correctly. and i hope you have not set some impossible lcd density like 2000. however, then bootloops should occur.
Click to expand...
Click to collapse
Thank you for the reply! I put it in correctly as far as i can tell and had no boot loops when i did the power + volume thing it still had lines all over I'm hoping at worse it's a problem with the lcd motherboard strip.
Hello everyone,
I have got one problem... I broke digitizer of my HTC Desire 500. So I order new one and to be sure, also LCD screen. I replaced, and...
After turning on, everything works fine. Digitizer works properly, screen shows normal picture. But after few minutes - restarts (I don't remember well) backlight of my screen goes down and now it have no backlight at all. I rebooted phone many times, I remounted screen and digitizer to be sure that connections are fine - but no results. I restored factory settings of phone with no effect too. :/
Please help, what happend? What could be the source of problem? I don't want to order new sceen if it could beak too ;/ I read other threats about coil problem in other HTC, but I cannot find any coil in my Desire's motherboard (maybe it is hidden under plate that covers CPU and other parts). I performed tests of light sensor and it works fine. Buttons lights fine too. The problem refers only to LCD screen, and backlight doesn't respond during test.
Anyone help?
same situation
Hello kowal_luki,
I'm just in the same bad situation.
After a bad fall of the phone the screen broke so I ordered a new one for replacing it.
Opening the phone I noticed that also the LCD (and not only the external screen) was broke so had to order also the LCD.
As precaution tried to power-on my device without a complete assembly and everything seemed to be fine, so I decided to glue the LCD to the outer screen (the touch screen) with a LOCA TP-2500 glue.
Then I re-assembled it up: at first the image was a little bit disturbed but the back-light was working; after few second the back-light turned off. I checked the cable, after that the image went perfect but the back-light still dead.
Did you find a solution for this -still not explanable- problem?
Hello,
Another guide from me , actually a tweak to solve the very annoying flickering issue with the screen of the x98 tablet with Intel integrated graphics chipset. You can easily detect this if you point the camera of your phone toward the screen.
The reason of the problem is called PWM which is set to only 200hz in our tablets as default. You can find exhaustive explanation of the issue here: http://www.flatpanelshd.com/focus.php?subaction=showfull&id=1362457985
And the solution is actually very simple: increase the value of PWM to 4000hz (yes much much more than the default value) with this great open source Windows program: https://github.com/tpurtell/PWM
Now our screen will not flicker anymore, I can set the screen light value to 25% and have the same level of colors contrast, without the need of playing with the brightness control of Intel (that would result in a loss of contrast).
Enjoy your new screen!