yashsingh1/xdaforums huggingface dataset:
[G4 General] AegisValour:
I agree, a custom rom will probably answer if the issue is software of hardware.

I too notice this delay you're talking about, but sometimes I do notice it still misses tap without registering it. It usual registers the tap but no action occurs. Honestly I don't mind that as much as swipes registering as taps/double taps.

I still believe it's a hardware issue though.
[G4 General] liamR:
I'm still not sure if it's a hardware or software issue, my sources at LG only tell me that no fix is on the way (maybe because it is a hardware issue?).

I already exchanged my G4 three times (the last one was from a new batch), I had enough now I'm returning it for good.
[G4 General] DoKaTSuYa:
Where did you buy your G4 ?
[G4 General] G4rcU:
I honestly doubt it's a hardware issue. I've experienced numerous of times that my tap was being kind of registered (I saw the ripple animation on the button) but nothing happened. And as I kept on pressing, button was acknowledging my taps every time it just that nothing was happening.

Sometimes there is also a huge lag between a tap and an action that is associated with that tap. So my guess is that there must be some background app misbehaving

Wysłane z mojego LG-H815 przy użyciu Tapatalka
[G4 General] llaugerm:
After Root

After I have rooted my T-Mobile G4 and removed the bloatware my phone is silky smooth. I don't have the touch issue any longer. Everything works the way is supposed to work. No lags at all. I'm sure if you are having touch issues we may see some Mod that will increase the touch sensitivity.
[G4 General] ruzkay:
how can we skip track with headset buttons? is there a setting? mine just changes volume
[G4 General] shook187:
Can someone explain how this isn't a hardware problem?

Take for example my 2 T-Mobile G4 with the same exact hardware and software fresh out the box, how is it one will register 10 touches at one time while the other one craps out at 6 and the screen goes all crazy with phantom touches after 5 fingers? How is that software related when they both have the same exact software?
[G4 General] nr2134:
Just got off the phone with LG and they did come to the conclusion that I should send my device in for repair rather quickly. Told me that they are unaware of issues with this device too. Hmmmm.......
[G4 General] mcnick0495:
I can confirm from my regional LG Rep that it's a software issue, and a fix is in the works. He says the team knows about it and a release for a fix could take about 4-6 weeks.

So, if what he told me was correct, this means flashing a custom ROM should also fix the issue, cause its software not hardware.
[G4 General] Svartsyn333:
Rooted yesterday, installed a kernel manager and changed some parameters. No missing touch issue ever since then. So it is most likely what I thought it would be, a kernel issue.
[G4 General] malnash52@gmail.com:
What did you change
[G4 General] Svartsyn333:
Governor from interactive to ondemand and minimal frequency to 384. Was more for battery life but turned out to be also effective on screen issues.
[G4 General] riribo12:
No issues

I have no issues on the H812 from videotron
[G4 General] shook187:
Haha...that has nothing to do with the screen but if it makes you feel better then a placebo is all you needed
[G4 General] daddymikey1975:
What if the kernel was mis managing resources and not ramping up the CPU when it should have. Thus could cause a lag that we perceive to be a missed tap etc. Without trying it, why be so quick to dismiss the idea?
[G4 General] Azure1203:
The reason I think it is software is because I can restart and it goes away for a couple days. I also think it might have something to do with SwiftKey. I have the version installed that works with 540 DPI, and don't want to update because I'd prefer 540 DPI, but if I kept my DPI at stock and used LG keyboard or Google Keyboard, I didn't have as big of a problem.
[G4 General] mishka_tech:
VS986 Verizon on 11a update no screen protector here. Missing touches regardless of how long the phone has been up. Does it even after a reboot. Great device otherwise!
[G4 General] shook187:
Return it
[G4 General] Orsocamillo:
I don't know how much it can help but here is my personal experience:

i was having touch screen issues, but since the beginning i was pretty sure it was something related to a software problem and not a hardware one, i did all the tests (touch included) in the secret menu with good results so i realized the problem had to be somewhere else.

I tried to reset and recalibrate all the onboard sensors, also entering a kind of menu full of tests u can access by rebooting, i don't know the name but it's not the recovery mode of course. Well at this point the phone crashed, no luck by holding power for about 1 min, i had to remove the battery (aaaah see how important is when you can remove it?) . I turned on the phone, i don't know what i did but now i have no touch screen issues anymore, everything works fine and the knock wakes the phone up at first try!
[G4 General] mihaitaiosub:
Hi,please help me

I have a LG G4 wich seems to have been bought from Germany.Software version is V10a-EUR-XX.No software update via Update center from LG.On LG site I can not unlock his bootloader.Tell me please how you roote your phone?I am from Romania and my provider is Orange.And btw i have same issues with touchscreen sensibility.
[G4 General] Svartsyn333:
There's a thread for this in the LG G4 Original Android Development section.
[G4 General] player911:
My VS986 Verizon misses touches. I run a naked screen. I disabled dual window, changed touchscreen input to medium, use Nova and Action Launcher, and tried every option out there. Nothing. It doesn't miss all that often but often enough. Being in IT I am constantly replying to emails on my phone as well as texting/chatting. I notice it. I am unable to replicate it though.

I do think it is a kernel ramping up issue or something. The Touchscreen is seeing the input but the applications aren't receiving it.

My big problem isn't the missed touches but rather the stupid LG Keyboard going wonky and crashing. When it loads back up, it highlights ALL MY TEXT and if I am not careful, 1 character will replace it all. I've lost whole emails because it will crash in the middle of a word and my entire email will be replaced with "ing!"

Now that we have root, I am really curious to see a CM/kernel on this and see if the problem goes away.
[G4 General] mihaitaiosub:
There is nothing for H815 v10a with locked bootloader.Your phone was the same software version?You managed to unlock the bootloader?
[G4 General] Svartsyn333:
You can just use 10c u guess. I updated from a to c before so I can't tell if it works with a. But I'm pretty sure there are others in this thread who said something about it.
[G4 General] mihaitaiosub:
Ok,but first step is the procedure for unlock the bootloader,I think,on LG site.How did you unlock the bootloader on your phone?
[G4 General] Svartsyn333:
I didn't. There's no need for an unlocked bootloader just to gain root. Read the instructions and you'll see.
[G4 General] mihaitaiosub:
How did you updated from a to c? Do you have a link with the procedure? This is the thread http://xdaforums.com/g4/orig-development/root-tmo-vzw-intl-variants-soon-root-lg-t3164765 ?
[G4 General] malnash52@gmail.com:
Have you tried a different keyboard like Google keyboard
[G4 General] nexy33:
Did that with my first g4 if their useless repair centre in the uk cant find a fault they will send phone back with nothing done carrier lg replaced directly
[G4 General] bigz1981:
I'm using a tempered glass screen protector & notice some issues, but I also noticed that the SGS Touchscreen Booster helped register my taps & swipes.
[G4 General] Svartsyn333:
What do you want with the root method for tmo and Verizon when you gave the international version? I updated because my carrier sent me an update which I refused to take until then. Simple as that. Now please just look for the right thread on your own and read what is written there. I'm not someone who doesn't like to help but if someone gives contradictory answers and refuses to read and research a little bit on his own I grow plain tired of answering.
[G4 General] mihaitaiosub:
Ok,thank you for nothing.I searched everywhere and have not found anything for international version with locked bootloader and V10a-Eur-XX software.This is the reason why I asked you about how you root your device.Sorry for the inconvenience and have a nice day.
[G4 General] raf1919:
I have TMO variant. I am having issues where sometimes i look at images they look very pixelated .. low quality.. hard to describe. where is happens most is when i got to MMS and attachments and than go to gallery, all the thumbnails just look awful, like pixelated and grainy.

anyone else seeing similar problem?
[G4 General] malnash52@gmail.com:
Image compression maybye
[G4 General] porc1:
Someone earlier suggested plugging in a USB cable to see if that helps. I've tried it a few times and I wasn't sure at first, but now I can definitively say it makes no difference for my phone.

Sometimes the phone just magically starts working fine. It did that all day yesterday. Today, it is back to sucking very badly. At least 50% of the attempts to swipe result in a tap. This is unusable and I'm pissed again! Earlier, I didn't think I was having the "hesitation" problem that others have talked about. But, now that this phone keeps alternating between good and bad, I see what they mean. There's a hesitation, but it is slight (small fraction of a second) and repeats many times a second. This makes for a scroll that isn't 100% smooth. And, what's interesting is this hesitation only happens when the swipe issue is happening. Yesterday, when I could swipe 100% of the time without issue, there wasn't this hesitation.

I'm not sure what that indicates though.
[G4 General] Azure1203:
So what were the kernel tweaks that people made to fix the issue? I have root now as well. Thanks.
[G4 General] spydersilk:
It's getting old having these problems. It's hit or miss for me. I will be scrolling and it will register as a tap and open something, sometimes it will require multiple touches to open or register the tap. I did a factory reset just for ****s and giggles and of course it didn't help.
[G4 General] Snakecharmed:
I've more or less quit caring about this issue until there's a new breakthrough discovery. I see it happening for me as a result of both lag and touch pressure. A fairly recent observation I've made is that if my tempered glass screen protector has a lot of oil on it from fingerprints, the screen is much less responsive. This also goes along with a previous observation that my screen was far more responsive (albeit still not perfect) before installing the screen protector.
[G4 General] CsabaZz:
G4 screen problem

Yepp, I have few misses also, but it's not block the daily use except the knock-on feature sometimes.
[G4 General] CiViCKiDD:
I've never used the knock feature, but I have the same random misses and unwanted "clicks" for some reason.

I had the stock sticker (with that hideous LG ad) on my screen for two days before my tempered glass screen protector came in, and I can honestly say I didn't notice any swipe issues before placing the screen protector on - though my use was very limited because I could barely see anything on the screen.

It's still not THAT bad, but using my other tech (work iphone 6, old sony z1, old galaxy s3, old nexus 7 2013, etc) the screen sensitivity is a definite step backwards. Today's the last day for me to decide if I want to keep or return this phone, and while I love that it caters to power users I (unfortunately) feel that my work iphone 6 takes better pictures than the G4. And I say this as someone who dislikes Apple and their ridiculously priced, and crippled tech.
[G4 General] gorast358:
What about this : http://www.phonearena.com/news/Update-to-Korean-LG-G4-fixes-certain-issues-with-the-phone_id71184
[G4 General] t41yu3:
Mine seems to work better when usb is plugged in also when i use headphones, phone seem to be less responsive when lying flat. Checked using multi touch app. Any feedback would be nice. Thanks
[G4 General] frope01:
Hardware, software, whatever it is LG should have fixed it by now! I shouldn't need to tweak every little aspect of my phone for smooth operation. They have let us suffer far too long. This phone has so much potential but I'm eyeballing that Note 5 release. LG may lose another one.
[G4 General] vegetaleb:
Now that's good news!

Looks like the screen driver update for both touch fix and higher nits
[G4 General] malnash52@gmail.com:
This has to be a software issue because from watching videos on YouTube on the LG g4 running games like Gta San Andreas the g4 had no missed taps at all
[G4 General] RedOCtobyr:
I think being at least somewhat software-related makes sense. During initial setup one time, I had a hard time typing on the keyboard, many taps were not registering. Then maybe 10-15 seconds later it was fine again. My assumption is the phone was working hard at processing something in the background, and perhaps wasn't polling the touchscreen as often as normal?

It felt a bit like Windows does (or at least used to) when it's REALLY stuck, and even the mouse cursor gets jerky.

Based on info in this thread, I have turned on "Show touches" and "Show touch data" in Developer Options to try and better understand what's going on. Most of the time, when mine misses a tap, it seems like I just tapped too lightly. But a few times it's seemed like I tapped firmly enough, but maybe too briefly?

Even after troubleshooting, maybe I should leave "Show touches" turned on anyhow. The visible feedback of whether a tap registered would help avoid waiting for something to happen, when the phone didn't actually notice the tap in the first place.
[G4 General] malnash52@gmail.com:
When did you get your phone just wondering
[G4 General] RedOCtobyr:
Mine is a Verizon model, bought from Best Buy.

I am on my third unit, using the same tempered glass screen protector on each. I'd say each was similar in terms of missed touches. So assuming that a replacement phone will be perfect with touches is, from my experience, probably unrealistic.

I briefly used one without a screen protector, I don't think it was suddenly perfect. But I have mainly had the glass protector installed, so I can't offer a full comparison.
[G4 General] aygul12345:
When is the software update comes out?

Verzonden vanaf mijn iPhone met Tapatalk
[G4 General] Sw33t_Lov3r:
My new G4's screen/touch screen is plain dead.

Hi friend and everyone!

I bought a G4 from Movistar in Peru. Had it 5 days stored because I wanted to sell it. Finally I got a very good offer from someone (his shiny Z3 + half the cost of the G4 in cash!!).

We met, I turned on the G4, at first even the battery seemed to be defective. But it turned on and... the touchscreen did not register a single touch!!! It's completely not working!!!

No matter what I did: Force GPU rendering (with a USB mouse through OTG), hard reset, re installation of the OS through LGMobile Support Tool. Nothing makes the touches be "felt" to the device.

I connected a USB mouse through OTG and I saw how pretty is the new interface, it all works beautifully with the mouse. And tried some advises; like turning on the "Force GPU rendering". Not a change.

I think this is the worst case so far. I should have made the store staff check the device before leaving the store. I just took it and left. What a mistake!!

I'm going right now to ask for a replacement, and I hope it's fine. It can not be damaged or with this issue! Nobody had complained over here!! I didn't know! =(

What can be so wrong!? Why me!

I hope LG fixes this problem already!

Thanks everyone. Have a nice day! n.n

- L.
[G4 General] Johnny Broccoli:
Mine has issues but they don't seem major. Just enough to be a bit annoying though. The worst is every once in a while while scrolling, the phone registers my scrolling gesture as a tap and opens a link. It also usually takes THREE taps to wake the phone.
[G4 General] AegisValour:
Do you have any sort of protector or on your screen? Mines is certainly worse once I got a tempered glass one.

I'll have to agree about the swipes registering as taps is more annoying than the missed taps. I noticed that if you use your finger flat on and rather on the side it happens less.
[G4 General] Johnny Broccoli:
Nope. Def no screen protector of any type. Not a fan of those things. Yeah, whatever minimal missed taps might be happening are nothing compared to opening links that I was meaning to merely swipe past.
[G4 General] RedOCtobyr:
I don't really get swipes registering as taps. But I do get missed taps. Verizon, running 611A.

I've turned on both "Show Touch..." options in Developer Options. And it's helped show me something interesting.

A few times the screen has displayed a short trace on the screen after a tap which did not actually do anything. So the phone recognized that I touched the screen, I have visible evidence, but nothing happened.

Two explanations come to mind:

- it thought I swiped across the button, rather than tapping, and so it intentionally did nothing

- something deeper under the hood did not successfully get the message from the screen that I tapped, even though part of the phone is aware of it

"Show touch data" is actually quite interesting, it leaves a trace on the screen of your last touchscreen action.
[G4 General] DoKaTSuYa:
I don't have unresponsive touch but I have when I am scrolling some tap, so it's boring to get back when you didn't tap and open a link for instance on Twitter. I even press like button on Facebook whereas I was just scrolling...
[G4 General] shbang:
I think I have some idea of what's going on with the unresponsive touch. The screen isn't calibrated correctly to register touches where a larger area of your finger tip is touching the screen. I've noticed that if I use my finger tips like when I'm typing into hacker's keyboard, the screen registers nearly all my touches. Otherwise I like to use my full finger print to hit touch buttons and swipe, and that's when I get loads of really annoying unregistered touches. When I just typed this up pecking away with hacker's keyboard, I had zero misses.

I've been searching /sys and /system files to try and find files/properties that could change the calibration of screen touches, but I havrn't made much headway. I've found that running a few basic tweaks to optimize the phone's "quickness"(governor tweaks) and surfaceflinger's(the app that processes screen touches) priority helps a bit.

This is a script I run on bootup:

#!/system/bin/sh
alias bb=busybox

# quicker cpu governor, helps with lag
find /sys | grep min_sample | while read i; do echo 20000 > $i; done
find /sys | grep timer_slack | while read i; do echo 120000 > $i; done
find /sys | grep io_is_busy | while read i; do echo 0 > $i; done

# make surfaceflinger very high priority, helps touch
bb ionice -c1 -n0 -p $(pgrep surfaceflinger)
bb renice -17 $(pgrep surfaceflinger)
:

This does help, but until we can adjust the touch calibration or get different drivers, there will still be misses.
[G4 General] jbdan:
You hit the nail on the head. Your description is exactly what is happening with mine. I've learned to use more "tips" of my finger/s. I'd like to go back to using my prints though.
[G4 General] adamfra:
LG G4

how to run script at bootup ? i am new to LG and android

my LG G4 just don't response to screen touch sometimes .. it makes things hard for me ..

-anyone who have tips on how to make LG G4 more responsive ? -
[G4 General] IlCattivo:
I just bought the LG G4 (H815 EU v10b) and I too have occasional missed taps and clicks when I try to swipe..very annoying.

However when I tick the 'force GPU rendering' it's less severe but still not perfect.

I'm contemplating whether or not to return the phone..

What I'm wondering about is this: are there people out there with perfect screens? Or are you just learning to live with the shortcomings of the screen?

No missed taps and no freaking out when using 10 fingers in the multi touch test app (YAMTT), no clicks when trying to swipe? Does it exists?

I guess for me the best way to test a new phone in the store is the multi touch test...if it can handle 10 fingers without freaking out with ghost touches it should be good right?

thanks for the feedback.
[G4 General] Johnny Broccoli:
I was wondering the same. Can put up with mine as is (and hope for an update that fixes it) but if the majority of devices don't have this issue I'd shoot for an exchange despite the hassle.
[G4 General] donbudafuko:
Does this work on non root phones?
[G4 General] shbang:
To run scripts at boot, you need to enable init.d. This is pretty easy with the G4. Pick any one of those /etc/init*sh scripts that run on startup, such as /etc/init.qcom.post_boot.sh. Then append an init.d startup script to the end:

echo 'alias bb=busybox
until [[ $(bb pgrep com.android.systemui) ]]
do bb sleep 1
done && bb run-parts /system/etc/init.d' >> /etc/init.qcom.post_boot.sh

Now you can put scripts in /system/etc/init.d to run at startup. Make sure the permissions are correct (chmod -R 0755 /system/etc/init.d).

Also I made some modifications to what I posted. Use this script instead:

#!/system/bin/sh
alias bb=busybox

#surfaceflinger and atd nicing
bb ionice -c2 -n1 -p $(pgrep surfaceflinger)
bb renice -13 $(pgrep surfaceflinger)
bb ionice -c2 -n1 -p $(pgrep atd)
bb renice -13 $(pgrep atd)

#fs i/o tweaks
find /sys/!(fs) | grep rq_affinity | while read i
do i=${i%/rq_affinity}
echo 2 > $i/rq_affinity
echo 0 > $i/rotational
echo 512 > $i/read_ahead_kb
echo 512 > $i/nr_requests
echo 0 > $i/iostats
echo 0 > $i/nomerges
echo 0 > $i/add_random
done

#governor tweaks
fsa=/sys/devices/system/cpu/
fsb=/sys/devices/soc.0/f9824900.sdhci/mmc_host/mmc0/mmc0:0001/block/mmcblk0/
find $fsa |grep min_sample |while read i; do echo 20000 > $i; done
find $fsa |grep timer_slack |while read i; do echo 120000 > $i; done
find $fsb |grep slice_idle |while read i; do echo 0 > $i; done
:

I added "atd" to be 'niced since it's heavily involved with the lcd. I adjusted the governor tweak oneliners, so they don't search through the selinux filesystem and cause the system to hang.

I got some more scripts, but I'm still testing them. The governors on the cpus act really strange... No wonder LG's governor tweaking script (/etc/init.qcom.post_boot.sh) is 68KB.

edit: Forgot to mention about the whole touch screen issue we're having. I decompiled the framework and apps in /system and didn't find anything. There may be something we can do with surfaceflinger, atd, and their libraries (libatd*, lib*flinger*). Most likely the C code would need to be patched and recompiled to give us new binaries and libraries. atd might be proprietary in which case LG would need to patch it. I'm gonna grind some of these files through IDA later and see if there's anything we can do. I'm really hoping this problem doesn't require kernel driver patches in which case we would be SOL until we get an unlocked bootloader or LG releases something.
[G4 General] shook187:
Actually no... I'm on phone number 4 and finally got one without any touches issues but when I ran the 10 finger test out the box it was fine but now it freaks out.

So yes you can have it failed the 10 finger test and still have no touches touch issues like mine.
[G4 General] chriskwarren:
In my particular situation, I have tried the Orzly 0.24mm glass and amfilm 0.22mm glass protectors, and I had touch issues with both. Today I switched to the spigen crystal plastic film protector and responsiveness is best with the film.

I tried the sgs app and did some of the tweaks (ie. Accessibility options, etc) and some helped.

The spigen film has helped the most so far.