Knock On Not Working

CmdrShepard · Oct 13, 2014

djpeesh said:
Go to the hidden menu.

Then click on hw device test

Then click on touch test

Then click on touch firmware update

Click OK and your knock on issues will be sorted (hopefully)

Sent from my LG-D802 using Tapatalk

Thank you this method work for me.
After I tried all the method in this thread and Knock On still doesn't work. I accidentally found out that you have to knock at a SLOWER pace for KnockON. I can still knock OFF at quick speed.
If you're still looking for a solution after the steps above, try tapping at a slightly slower pace

rootlinux · Oct 13, 2014

Try flashing a knock enabled kernel like Dori.
My knock on wasn't working after Autorec on zvd. Dori kernel fixed it.
It isn't zvd that makes knock on not work. The problem is the kernel in Autorec. It worked fine after OTA then stopped after Autorec. Did it three times to verify. Fourth tot, OTA and then AUTOREC I then rebooted to recovery and flashed Dori.
Boom... All knock works perfectly.

Theolode · Nov 5, 2014

Finally someone who found my problem. Exactly what happened to me.
Did the OTA, rooted whit ioroot and run autorec. And then the knock on/knock code stopped working.
Did the hidden menu thingy and knock on works again. But knock code does not. Have tried to reboot and activate/unactivate knock code. But it still works like a knock on.

So do anyone know about a better way to install custom recovery whitout using autorec? Does the autorec people know about this?

cheers

olderbloke · Nov 22, 2014

mcapocas said:
Is it normal that knock on isn't working when knock code is used to unlock the phone ?

Just put cloudy g3 2.1 on D802 with Dorimanx kernel. I thought I also had knock on issue. But found that rather than tap the screen to get home screen to show, the knocks have to be in the same position as your code. I hope this might help someone.

Petbath · Nov 26, 2014

knock unlocking - proximity sensor

Hello to everyone,

after getting all this helpful info through this forum I've decided to contribute something myself.

I had the same issue after replacing my LG g2 screen. It worked fine before.
The problem in my case was the proximity sensor. It sits behind an oval window between the front facing camera and the light sensor. It has two small lenses, a bigger or the left and a smaller on the right.
If that sensor sits slightly wrong or the front rubber case is missing (I didn't noticed it the first time) or the required pressure from a small rubber behind (it is on the upper black secondary housing with the 7 screws) is not enough to hold it in a fixed certain place, it doesn't work correctly or at all.

When this happens the sensors detects near (meaning you have the device close to your face) and Knock unlocking is blocked. Also when you are making a call the screen goes off for the same reason, so it is easy to notice.

After I noticed and placed the front rubber case from the old screen, it was working, but slowly. It detected quickly the "near" position but it takes several seconds to re detect "far" position.

The final solution was reinforcing the small rectangular rubber which pushes the light sensor and the proximity sensor from behind, with two small pieces of sticker and the problem disappeared.

You can check that through the hidden menu (for my case 3845#*802#), HW Device test, ALC Proximity Test.
It should change rapidly from NEAR to FAR then waving your hand over the sensor.
If not, push firmly with one finger behind the sensor and see then if it is working

alexsoin · Dec 17, 2014

trouble

I have another type of issue.
I don't see this screen by selecting "update touch firmware".
Do I have to be on wi-fi coz I don't have any, only 4G by TMobile
I had to update my 4.3 PA ROM for LG G2 D801 Claro PR (which worked great btw, only dynamic was tiny) to stock Claro KK since I "bricked" it.
Claro KK is fine with lots of bloat

dynamic is superloud but issues with knock on, knock off works perfect.

neonsrt4 · Jan 20, 2015

lg g2 knook on code

Hello everyone i seem to not be able to get my knook on to work. The phone will knook off but not on. This phone was rooted before i owned it but the guy set it back to stock and took the root off for me. I have done the hidden menu but that dont work i have verizon and i have 4.4.2 right now

sobitthen · Mar 1, 2015

Gone after 5.0?

Can't find this hidden menu after moving onto CM12, on a D800, about thinks an 801 now, tried both, did this get overwritten when migrating to Lollipop?
Guess knock is still here, under display option was toggled to pick up to wake and reason knock was being overridden, then had to knock, tap, on top bar to sleep, glad that is still there, was handy..

jaimbot · Mar 7, 2015

Hey guys, I have custom recovery and root D801, my knock on randomly stopped working, I tryed the hidden menu and updating the touch firmware but that did not fix it, any suggestions?

jadugur · Apr 18, 2015

largelager said:
Originally Posted by rafaelsartori
3845#*802# --> Settings --> update touchscreen firmware

Just remember Change the 802 part to your model.

Thanks if helps

Sent from my LG-D805 using XDA Premium HD app

this hidden menu code not working on cm12 :/ what should i have to do ? i have d800

ar31an · Apr 18, 2015

jadugur said:
this hidden menu code not working on cm12 :/ what should i have to do ? i have d800

try this app:

https://play.google.com/store/apps/details?id=org.vndnguyen.shortcutmaster.lite&hl=en

jadugur · Apr 19, 2015

ar31an said:
try this app:

https://play.google.com/store/apps/details?id=org.vndnguyen.shortcutmaster.lite&hl=en

Its shows this

ar31an · Apr 19, 2015

jadugur said:
View attachment 3271024

Its shows this

Touch on the 3 dots in top right corner, then select app explorer and then find hidden menu.

also have you tried this code: 3845#*800#

dominicanandroid · May 19, 2015

fixed knock on issue.. kinda

i know that there are other ways to fix the knock on problem.. I have an LG ms323 and I fixed the problem by changing my lock screen.. goto settings and change lock screen to "Swipe" and turn your screen off.. you should now be able to knock on the phone and at least choose to enable or disable knock on feature.. it wont be greyed out anymore..

Fighting Dreamer · Jun 19, 2015

smirandaMEX said:
Hi Everyone,

I'm new to the site as registered user since I have been always for information but I will start sharing my experience with you all.

The one I have is a LS980 sprint model unlocked and running a RayGlobe Flex 3.5 custom rom, I bought it that way and since I bought it knock on feature will not work (Knock off does).
So after checking the setting on about phone/hardware information it shows model D802 so whoever install/unlocked the phone changed the device name.
So I used the *802# code for the hidden menu and it showed up.
In the Hidden Menu (thats the title that shows) select HW Device Test / Touch Test / Touch Firmware Upgrade (It will show to wait 10 sec to check version)
I also did the option in the main Hidden Menu / Settings / Update Touch Firmware it will freeze for about 5 sec while doing the update and then you can go back to home screen on your device and try it.

That worked for me :good::good: .

Here's some hidden menu secret codes. You might want to double check your model number in the phone settings.

3845#*802# (for International model)
3845#*801# (for T-Mobile)
3845#*800# (for AT&T)
5689#*980# – (for Sprint )
Dial: ##228378 + send (Verizon)
Other models, please use 3845#*YOUR-MODEL-NUMBER#

A second fix and more complicated one that I tried was to install custom rom CloudyG3 and it works just fine.
http://xdaforums.com/showthread.php?t=2783192

I had install cloudyG3 and upgrade the Touch Firmware but still cannot use knock on any idea？

---------- Post added at 10:45 PM ---------- Previous post was at 10:33 PM ----------

Petbath said:
Hello to everyone,

after getting all this helpful info through this forum I've decided to contribute something myself.

I had the same issue after replacing my LG g2 screen. It worked fine before.
The problem in my case was the proximity sensor. It sits behind an oval window between the front facing camera and the light sensor. It has two small lenses, a bigger or the left and a smaller on the right.
If that sensor sits slightly wrong or the front rubber case is missing (I didn't noticed it the first time) or the required pressure from a small rubber behind (it is on the upper black secondary housing with the 7 screws) is not enough to hold it in a fixed certain place, it doesn't work correctly or at all.

When this happens the sensors detects near (meaning you have the device close to your face) and Knock unlocking is blocked. Also when you are making a call the screen goes off for the same reason, so it is easy to notice.

After I noticed and placed the front rubber case from the old screen, it was working, but slowly. It detected quickly the "near" position but it takes several seconds to re detect "far" position.

The final solution was reinforcing the small rectangular rubber which pushes the light sensor and the proximity sensor from behind, with two small pieces of sticker and the problem disappeared.

You can check that through the hidden menu (for my case 3845#*802#), HW Device test, ALC Proximity Test.
It should change rapidly from NEAR to FAR then waving your hand over the sensor.
If not, push firmly with one finger behind the sensor and see then if it is working

My proximity sensor cannot change rapidly from near to far when my hand over the sensor , any idea for fix it?

Underground597 · Jul 13, 2015

This worked thank you

tahirawan4 · Aug 1, 2015

rafaelsartori said:
3845#*802# --> Settings --> update touchscreen firmware

Just remember Change the 802 part to your model.

Thanks if helps

Sent from my LG-D805 using XDA Premium HD app

Doing this but my lg g2 do nithing.
Problem with my lg g2 D802 is, My Phone upgrade from 4.4.2 to 5.0.2, After upgrade to 5.0.2 its touch goes abnormal. When i touch it shows touchs on 5 to 7 different location.

t-mobile_mda · Aug 17, 2015

finallly there is no solution for LS980 Update Touch Firmware..? all methods which posted on the thread not worked..

michaelcarnero · Oct 5, 2015

rafaelsartori said:
3845#*802# --> Settings --> update touchscreen firmware

Just remember Change the 802 part to your model.

Thanks if helps

Sent from my LG-D805 using XDA Premium HD app

Thanks BRO! this worked for me

fcarlin · Oct 14, 2015

I hope this will help. I had 2 problems,
First - my lg g2 (T-mobile) started to act strange, swiping through screens, auto clicking icons, etc. You most probably read about this problem, and most of the responds where saying that it is digitizer problem, and
second - double knock was not working, even though I could turn screen off by double clicking.

Solution, that worked for me:
1. I factory reset my phone, but problem occurred again.
2. I believe this was the main reason everything came back to normal, I had Knock Code active, after I turned that off, and replaced with other lock (pattern lock), double knock worked again, and more importantly ghostly screen movements, and icon clicking stopped. So far, phone is responding normally. I had no more problems with it. I will see what happens in meantime. I will let you know.

hopefully it will help solve your problems!

Knock On Not Working

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