Touch Screen (Digitizer) to Screen Display Mapping Issue - Android Q&A, Help & Troubleshooting

Hello
I just replaced the touch screen of my generic 9inch Android Tablet running on Jelly Bean. I couldn’t get the genuine one so I just bought a compatible one: The screen works BUT it doesn’t properly map the co-ordinates on the Display. Bottom and the sides are OK but the top (about 1 inch in landscape mode) has no response. The screen is all working : The bottom matches fine but as you swipe upwards you can see that your finger touches a higher point which matches a slightly lower point on the display. When your finger reaches the top …the matching map becomes about 1inch bellow on the display.
I need help to fix this issue: I think there would be a file inside my android where there would be values to match the Display Screen mapping with the Touch Screen (digitizer)
Thank you in advance……

Related

[Q] Rotated upside-down

Hi, everyone!
I had to flash my phone because one day it got stuck in the boot logo. I didn't have the ROM backed up since I was not planning to mess with the phone's software in any way.
I own a Star N800+. Sadly, I couldn't find a suitable ROM anywhere. So I followed @cybermaus ' advice (find a ROM for a phone that has same processor, same memory, same buttons, same screen type and resolution, same sensors, same camera -- http://forum.xda-developers.com/showthread.php?p=36326293#post36326293) and decided that Star/Ulefone N9770 had to have the same hardware. So I flashed a couple of ROMs for N9770 into my N800+ and each one worked great (that is, camera, gps, wifi, g-sensor, buttons where all working) but the screen was rotated upside-down. I mean, every single thing that gets diplayed on the phone from boot logo, to android menu, to every app, to the image from the camera are shown rotated upside-down but in order to operate the phone you have to tap as if you were viewing it right. For example, to tap on the upper-left corner of the image you have to tap on the lower-right corner of the phone's display.
Mi guess is that even if both phones may have the same hardware, there should be some parameters that are not the same for both models. Could anyone, please, give me a hint on this matter?
Here is my phone info:
Star N800+
MT6577 processor,
bootloader came unlocked from factory,
Android version e1909c_v77_jbl_9p017_6628
Baseband version MAUI.11AMD.W12.22.SP.V15
Camera Aptina A-pix MT9p017
Build.prop settings
heraklejon said:
... the screen was rotated upside-down. I mean, every single thing that gets diplayed on the phone from boot logo, to android menu, to every app, to the image from the camera are shown rotated upside-down but in order to operate the phone you have to tap as if you were viewing it right. For example, to tap on the upper-left corner of the image you have to tap on the lower-right corner of the phone's display.
Mi guess is that even if both phones may have the same hardware, there should be some parameters that are not the same for both models. Could anyone, please, give me a hint on this matter?
Click to expand...
Click to collapse
Update:
I tried to change ro.sf.hwrotation in /system/build.prop from 0 to 180. Some people reported this will rotate lcd display while keeping touchscreen settings. Nothing happened in my device.

[Q] Touch screen resolution

Hi,
I have the following problem with my Xperia Neo (hallon):
My touch screen crashed some time ago, so I bought a new one and replaced it. Since then the touch screen works in most parts of the screen just fine. Only in the range around the navigation bar the touch screen does not work. I tracked my finger with the "pointer location" option so I can see that touches are recognized from 0x0 to 478x731 pixels. Beyond that "731 pixel line" the touch screen does not work, so the lower part of my screen does not react because its resolution is 480 x 854 pixels.
My assumption is that the touch screen resolution is too low for the new touch screen so I tried to increase it. I created a "/system/usr/idc/Vendor_0000_Product_0000.idc" file and set it according to the input device configuration guidelines and added a "build.scr" to my sdcard folder but nothing changed.
Any idea what my mistake is?
Regards

[Q] Miracast to fullscreen in portrait

Hi,
I'm trying to screen cast from a Nexus 4 to a large screen TV (using a PTV3000). I want to put the TV in portrait mode and have the screen case occupy the entire screen, however I don't seem to find a way to accomplish this. When the phone's orientation is vertical (portrait) it assumes the TV is in landscape orientation and the phone screen is displayed small in the middle of the TV with black space on the sides.
After doing some searching it seems that this behavior can only be changed with a custom ROM, however I haven't been able to pinpoint where in the AOSP tree this behavior can be changed. Any suggestions are much appreciated.
Thanks!
Full screen
mariusmuja said:
Hi,
I'm trying to screen cast from a Nexus 4 to a large screen TV (using a PTV3000). I want to put the TV in portrait mode and have the screen case occupy the entire screen, however I don't seem to find a way to accomplish this. When the phone's orientation is vertical (portrait) it assumes the TV is in landscape orientation and the phone screen is displayed small in the middle of the TV with black space on the sides.
After doing some searching it seems that this behavior can only be changed with a custom ROM, however I haven't been able to pinpoint where in the AOSP tree this behavior can be changed. Any suggestions are much appreciated.
Thanks!
Click to expand...
Click to collapse
Did you ever get the full screen to work?

s6/edge/+ Hand Sensor good idea

The s6 has an unused hand sensor at the bottom.
Any ideas about this sensor to use for the display switched not off ( Hand Mode )
I think that would be a very useful feature
The whole bottom responds to touch

Multi touch issue

I have a weird issue. When I place two fingers on my phone screen and they're both placed om the same line, it causes issues. As shown in the example bellow
Your browser is not able to display this video.
As you can see, when one finger moves across the screen the other static input slightly moves left and right. Also shown at the end is what happens when the fingers aren't lined up, the issue doesn't happen. I don't know of this is how every touch screen works. And if it does, can this function be turned off?

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