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Multitouch problem

Hi!
I recently bought an O3D and I'm getting some multi-touch problems.
As you can see, when you tap 3 times with another finger already tapping, multi-touch goes totally wrong. This happens after unlock/lock screen sometimes, and if you tap 3 times again the problem disappears.
Video from other user.
Kernel problem? Is there any solution? This makes playing multi-touch games (Nova for example) really anoying or zooming in browser with two fingers.

So sad to see the behavior of your touch screen, cause when I do the same test on my O3D it recognize 8 fingers without any problems. Are you rooted? Did you try for example my ROM to see if it makes any difference?
Sent from my amazing LG O3D using ThiaiZO3D V2.4

ThiaiZ said:
So sad to see the behavior of your touch screen, cause when I do the same test on my O3D it recognize 8 fingers without any problems. Are you rooted? Did you try for example my ROM to see if it makes any difference?
Sent from my amazing LG O3D using ThiaiZO3D V2.4
Click to expand...
Click to collapse
Mine recognizes up to 10, but when this happens only recognizes one at time. If you tap three times the problem is gone until you tap 3 times again.
I've tried with custom roms (one of them is yours), rooted, etc.

i confirm the problem...but the games looks not to be affected by it...they works perfectly.Only with touch test i have the problem...very strange and i have your rom thiaiZ...any other experice of it?

I have the same problem...
I'm on CM7 nightly 32 (for the P925 because of the Baseband problems)
but it is a bit strange.. sometimes it works and sometimes it doesnt, i don't know why

I have similar problem.
When I play a game the touch screen with 1 finger is okay but when I play with 2 fingers it stops to recognize the both fingers.
So I have to walk and then stop and then aim and then fire which sucks.

I have the same problem. Is this problem related with hardware?

hi everyone,
i tested this too and i noticed a certain pattern. If i turn off my phone and then turn it on and then run the multitouch tester i will get the issue you described. However if i turn it off and then turn it on and then move my finger from the left of the screen to the right of the screen 3 times(on the homescreen) and then I run the multitouch tester the issue is gone and the touch screen works perfect afterwards. Its a very weird bug. can someone confirm this on their phone also. If a programmer can develop an app that imitates 3 swipes when the phone unlocks then this annoyance is fixed.

Multitouch problem-any permament solution?
Have anyone found a permament solution?The thing is annoying.Has anyone got hardware fixing solution to this problem?Maybe the flat cable (placed at power button)?I've noticed it after 5 months of use.I haven't tried it myself with any other optimus 3d device.Could anyone confirm not having a problem?Btw, I use 2.35 official, without root or any kind of mod.Please, help.

rgunara said:
hi everyone,
(...)However if i turn it off and then turn it on and then move my finger from the left of the screen to the right of the screen 3 times(on the homescreen) and then I run the multitouch tester the issue is gone and the touch screen works perfect afterwards. (...)
Click to expand...
Click to collapse
Yeah, I've noticed this problem too and your three swipe solution seems to work fine. I also realised that I don't need to be on the home screen for this to work. I swiped on the tester screen itself and multitouch resumes working.
Testing with Antutu Tester I can get 10 simultaneous touches. The hard thing is to make 10 fingers fit into the screen
Sent from my LG-P920H using xda app-developers app

Touchscreen Insensitivity in Modern Combat 3?

Hey, was playing Gameloft's Modern Combat 3 on my G2x running Eaglesblood sandwich, build 3, and i noticed something strange that greatly hindered gameplay.
The issue i was facing is that the floating analog joystick logs my input while moving the player only for like 2-3 seconds and then just reverts to its originaly postion forcing me to touch the screen again to make it register my input. This basically causes the player to move in spurts!
I don't know whether this is a game specific issue, isolated issue or an issue related to the ROM. Hope it's isolated. I'm not trying to allocate blame here, but i think the new Trinity kernel with the UMS feature that came with EB build 3 might have a different touchscreen sensitivity compared to other kernels.... dunno if im right, but just a guess.
Anyone else having similar issues?

Get "Phone Tester" from the market and go to Multi-Touch test. Hold down your fingers and move around then leave them on the screen for a bit (just imitate playing). That'll tell you if it's an application specific issue or not.
https://play.google.com/store/apps/details?id=com.mtorres.phonetester&feature=search_result

Jufjufjuf said:
Get "Phone Tester" from the market and go to Multi-Touch test. Hold down your fingers and move around then leave them on the screen for a bit (just imitate playing). That'll tell you if it's an application specific issue or not.
https://play.google.com/store/apps/details?id=com.mtorres.phonetester&feature=search_result
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Click to collapse
The G2x should have no problems with multi-touch. It supports up to 10-touch points simultaneously.

Theonew said:
The G2x should have no problems with multi-touch. It supports up to 10-touch points simultaneously.
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Click to collapse
The point of the test is to figure out whether his problem is application specific or not. Not to show whether multi-touch works but that the points stay on the screen.

Will take a look at phone tester.. Thanks
But did anyone experience similar issues?

G-Sensor Stopped Working

I have had issues with both my G-Sensor & volume of quite a while. Rebooting my TF always fixed the problem. Again last night it happened when I tried play Asphalt 7 I couldn't steer the car. Rebooted & everything was fine. This afternoon it appears that rebooting no longer works & with screen rotation on my screen will not rotate either. I wipe my tablet & that didn't do anything. It looks like to be the G-sensor is hosed.
I running stock ICS but my TF is root. Any thoughts?

Did you try other apps/games that use it? Do they have the same issues? Maybe it's a game update gone bad?

Lethe6 said:
Did you try other apps/games that use it? Do they have the same issues? Maybe it's a game update gone bad?
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Click to collapse
Its not the games. My screen will not even rotate. GPS status uses the G-Sensor for the compass & it does nothing. Like I said, I wiped it back to factory & that had no effect. Now as I am writhing this it miraculously started working again which has me scared. so now I am really baffled.

Touch screen sensitivity

Hello. I have an Nvidia Shield tablet k1 on lollipop 5.1.1. Everything is great about this tablet except the touch screen. It is really sensitive. Also, when I am scrolling, it "jumps" and goes faster than I actually scrolled. It scrolls faster than it should. I found this thread on xda. It helped a little with the being too sensitive issue, but scrolling is still really weird. This is my second device since the first one's micro sd card was defective. They both are like this. Is there anything I can do, or do I just have to deal with it?
http://forum.xda-developers.com/shield-tablet/general/adjust-touchscreen-sensitivity-t2963326

I was opening a thread with this exact same issue. I'm not on stock though (using the latest CM12 nightly), so I don't seem to have the 'Sensor Calibration' option.
Also the touchscreen seems to register a touch even when the finger is not touching the screen.
On the other hand, if I scroll a very small distance (like 0.5 centimetres) the list I'm scrolling doesn't move at all. This doesn't happen on other devices such as my Nexus 5 and Nexus 7 and is very annoying in some cases (some games, or moving the cursor for keyboard input).
I'll try to record a video of this behaviour.
What can we do to fix this?
Update: found a video (not mine) showing the issue I'm talking about: https://www.youtube.com/watch?v=08uPtusOJHQ

anyone else with this issue?

I also have this issue on/off sporadically on stock rom.
I'll be scrolling and itll jump back the opposite direction
Its like it looses track of the touch then catches it again.
It's irritating as my S5, Nexus 2012 have no problems scrolling smoothly.
I don't recall the original shield i tested in store to have this issue either.
Currently having amazon ship me a replacement to see if its just limited to the one I received. (QA issues)

Calibrating screen might fix the issues: go to About in settings and tap on model number until the calibration screen comes up. then hit calibrate. don't touch the screen then when it asks to reboot, reboot.

variance said:
Calibrating screen might fix the issues: go to About in settings and tap on model number until the calibration screen comes up. then hit calibrate. don't touch the screen then when it asks to reboot, reboot.
Click to expand...
Click to collapse
Did it fix the issue I posted the video about? I'm on Cyanogenmod now so I don't have the option to calibrate the screen, but I would consider going back to stock if it fixed this issue...

Calibration doesnt help at all , same issue at brand new k1. Nvidia says thats normal functionality lol

Yeah, very normal for a gaming tablet which would require precision...

Not trying to take up for this thing but I haven't had the first touch screen issue with it . so maybe not all is affected?? I've tried to replicate the issue but just can't everywhere I touch and slide is smooth

You mean it doesn't "jump" like the OP said? I don't seem to have that issue either.
I'm more concerned about the touchscreen's precision, as shown in the video.

[Fix] multi touch/ghost touch issue

Those who don't know there are some people having ghost touch issues on POCO f1 and one guy able to capture it on the video. I personally didn't had the issue but after trying I was able to recreate the issue on my device. soon after I found the cause and able to fix the issue. this may or may not work on your device but absolutely worked for me. this seems to be a software bug. and no-one needs to panic. hopefully it will be fixed in next update.
how to recreate the issue?
Steps
1. download a multi touch tester app I used this
2. first do some testing yourself see if you can spot the issue
3. now do 3 finger swipe down (phone will take screenshot)
4. now randomly touch your screen with 1 or 2 fingers you'll notice 1 or 2 ghost touches.
How to fix Fix it?
Steps
1. go to settings>additional settings>button and gesture shortcuts>take a screenshot
2. and set it to none.
3. reboot
that's it!
the issue should be fixed
please let me know whether this worked for you or not

Yes.
As you mentioned issue was there.
But fixed with those steps.

okaraosp29 said:
Those who don't know there are some people having ghost touch issues on POCO f1 and one guy able to capture it on the video. I personally didn't had the issue but after trying I was able to recreate the issue on my device. soon after I found the cause and able to fix the issue. this may or may not work on your device but absolutely worked for me. this seems to be a software bug. and no-one needs to panic. hopefully it will be fixed in next update.
how to recreate the issue?
Steps
1. download a multi touch tester app I used this
2. first do some testing yourself see if you can spot the issue
3. now do 3 finger swipe down (phone will take screenshot)
4. now randomly touch your screen with 1 or 2 fingers you'll notice 1 or 2 ghost touches.
How to fix Fix it?
Steps
1. go to settings>additional settings>button and gesture shortcuts>take a screenshot
2. and set it to none.
3. reboot
that's it!
the issue should be fixed
please let me know whether this worked for you or not
Click to expand...
Click to collapse
Good stuff. I was skeptical at first since I knew something was off sometimes. Thanks for confirming it. Should be fixed if they took notice of this bug.

Thanks! The issue is 100% reproducible with the app. By turning off 3 finger screenshot shortcut, the issue goes away.

Guys, please file a bug, so this can be fixed and we can go back to using this feature.

1.Yes, that issue is due to the screenshot feature, but shouldn't the phone be able to distinguish between 3 finger touch and more than 3? Either take screenshot on four finger swipe or register it.
2.Can you please confirm if there is accuracy problem in PUBG aiming when you use multitouch? Like the multitouch bugs in Pixel and Zenfone Max Pro but quite subtle, the thing about the other devices are, they look and have been acknowledged by the respective companies regarding the issue but in our case, Xiaomi or Poco is making no announcement or anything.
https://www.youtube.com/watch?v=e5K2N6McC_s

The issue comes up after taking a 3 finger screenshot, but disabling may not be the only solution as this feature is quite useful also
What I have noticed is that after taking screenshot ghost touch is there till we use 1,2 or 3 fingers. Once we use 4, 5 or higher fingers the issue goes away.
Isn't it better to just touch screen with 4 fingers after taking a screenshot which somehow resets the ghost touch issue.
Have tried this solution with multi touch tester app

Mine is just fine even when 3 finger swipe screenshot is switched on

I can confirm that ghost touch issue still persist even when disabling three finger screenshot.
Mostly visible in pubg.

Great, fix worked

I didn't relize the issue but nice posting

Stop it! This is not an issue. It happens on mostly every phone that supports gestures. Test it on OnePlus 6 and you will get the same result.

GizmoFreak said:
Stop it! This is not an issue. It happens on mostly every phone that supports gestures. Test it on OnePlus 6 and you will get the same result.
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it is software bug which creates inconvenient experience with touch screen.. this fix is just a workaround until official fix..

raj7749 said:
it is software bug which creates inconvenient experience with touch screen.. this fix is just a workaround until official fix..
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Click to collapse
Okay, show me how this affects your usage of phone. Don't show me on touch testing apps. Show me a real use problem.

GizmoFreak said:
Okay, show me how this affects your usage of phone. Don't show me on touch testing apps. Show me a real use problem.
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Click to collapse
lol.. i don't need to prove to you anything about this, don't care wht u think.
However ill tell for the benefits of the others, it was effecting me while playing games.. specially RPG games where multitouch is heavily use. I was seeing weird behaviours sometimes, when selecting troops.. thts how i came to know

raj7749 said:
lol.. i don't need to prove to you anything about this, don't care wht u think.
However ill tell for the benefits of the others, it was effecting me while playing games.. specially RPG games where multitouch is heavily use. I was seeing weird behaviours sometimes, when selecting troops.. thts how i came to know
Click to expand...
Click to collapse
Okay, please record a video of you playing and of course don't show me but share for the benefit of the community.

GizmoFreak said:
Okay, please record a video of you playing and of course don't show me but share for the benefit of the community.
Click to expand...
Click to collapse
xD, if needed will do M too lazy to do that for now

raj7749 said:
lol.. i don't need to prove to you anything about this, don't care wht u think.
However ill tell for the benefits of the others, it was effecting me while playing games.. specially RPG games where multitouch is heavily use. I was seeing weird behaviours sometimes, when selecting troops.. thts how i came to know
Click to expand...
Click to collapse
Exactly! There is no need to prove this issue because Google itself confirms that they have done a mistake by releasing it in Oreo and they have also promised to give a fix in later Pie updates. And people who wants proofs can look up in the internet about the "Multi touch Oreo Bug" problem and how it effects user experience rather than spamming here to make a point.

$hivaM Manav said:
Exactly! There is no need to prove this issue because Google itself confirms that they have done a mistake by releasing it in Oreo and they have also promised to give a fix in later Pie updates. And people who wants proofs can look up in the internet about the "Multi touch Oreo Bug" problem and how it effects user experience rather than spamming here to make a point.
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Click to collapse
Dude, google fixed the issue in the May or June patch and all other OEM's had to merge their builds to fix it. The problem is not there in MiA1 or MiA2.
Here is the bug:
http://en.miui.com/thread-3746297-1-1.html
Thanks

Maybe the original solution for 8.1 and P devices will work for this? It will either cause a bootloop, do nothing, or fix it... worth trying! Obviously an unlocked bootloader is needed for this (Magisk).