Unlocking with fingerprint, but asks for PIN every time. - LG G7 ThinQ Questions & Answers

I've discovered that if I lock my phone using the power button, the fingerprint sensor works fine and unlocks my phone. However, if I lock the phone using double tap, the fingerprint sensor will not work and it will ask for my PIN everytime.
Is this a bug or intended?

Nevermind I figured it out... I was using a 3rd party launcher.

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Screen off and lock - Without button?

I'm used to switch off the phone tap (or swipe) of the screen, without using the power button. But this method for HTC 10 is not working.. I tried to put different applications (for example Screen off and lock), but they are in conflict with the scanner - scanner is not working . Does anyone have any ideas?
Custm rom will give you this feature but you'll have to unlock your BL
The only app that can do this is screen lock pro by Prahallad, but it's a paid app.
It's achieves this via a workaround, which has a side effect that the screen is not actually locked until about 10 seconds after u initiate the lock.
Gestures in Nova Launcher can do this. I have it set to lock when I swipe down on the homescreen. The one catch to this (or any other third party solution) is that fingerprint unlock will be disabled until the device is locked with the power button.
chong81 said:
The only app that can do this is screen lock pro by Prahallad, but it's a paid app.
It's achieves this via a workaround, which has a side effect that the screen is not actually locked until about 10 seconds after u initiate the lock.
Click to expand...
Click to collapse
Thanx, u method is working...:good: ( Screen lock pro by Prahallad)
I discovered this behavior with the A9 and 6.0.1. What happens with a lock screen app, most will actually lock the phone, then when you try to use something like a double tap to wake, the phone acts as if it did a reboot, and requires a PIN to unlock. You can't use a fingerprint/face etc..upon a reboot...a PIN is always required. All the apps did this I tried.
The way I use a lock screen/wake is to 1) Root the phone, 2) Install Xposed, 3) install Gravity Box for MM, 4) Navigation buttons, 5) then use the Home button and set the double tap to Sleep.
Have to reboot after activating Gravity etc. You need to be familiar with Xposed and the modules/activating them.
Then if you double tap home to slepp. Then, also put your finger on the Fingerprint for example, and it unlocks and goes right to the screen. You can use the PIN/Face etc as well...but the lock programs always fooled the phone into thinking it rebooted, and only a PIN would unlock it..annoying. This method stops that, so you can still have security, and simply double tap to lock the screen, and easily wake the phone/unlock it with a variety of options.
Not sure if this is how you are using it, but none of the Lock screen apps will work. I've tried them all on the A9 6.0.1 MM. Only Rooting and Gravity Box will give you an ability to do something like a double-tap to sleep, without the reboot PIN always prompting you when you do unlock the phone.
wake On gesture
Miha2e said:
I'm used to switch off the phone tap (or swipe) of the screen, without using the power button. But this method for HTC 10 is not working.. I tried to put different applications (for example Screen off and lock), but they are in conflict with the scanner - scanner is not working . Does anyone have any ideas?
Click to expand...
Click to collapse
You can fine in app store
Tks giovanni
Is possible to lock the screen with power bottom, and one screen time out how to lock. nougat ,how, Tks giovanni.
Newby on HTC...Stock.
Miha2e said:
I'm used to switch off the phone tap (or swipe) of the screen, without using the power button. But this method for HTC 10 is not working.. I tried to put different applications (for example Screen off and lock), but they are in conflict with the scanner - scanner is not working . Does anyone have any ideas?
Click to expand...
Click to collapse
I personally use the double tap home on venom rom.. Works well.
Double tap screen will be kernel based, not sure how efficient it'll be on battery so I'd avoid it and use the double tap home key, not a massive difference.

Fingerprint senor only wakes, doesn't unlock

This is what is happeing to me. If my phone is locked for more than 20 minutes or so, when I use my fingerprint to unlock the phone, it only wakes th phone, I.e.turns the backlight on, but doesn't unlock it.
The fingrprint registers correctly, as the screen wouldn't wake otherwise. I'm struggling to understand what the problem could be.. maybe its Go Launcher? Maybe its lightflow? Or someway around notifications?
do u have a pin set up or pattern
Yes I do. When I use my fingerprint, it takes me to the screen to input my PIN
TarunN5 said:
This is what is happeing to me. If my phone is locked for more than 20 minutes or so, when I use my fingerprint to unlock the phone, it only wakes th phone, I.e.turns the backlight on, but doesn't unlock it.
The fingrprint registers correctly, as the screen wouldn't wake otherwise. I'm struggling to understand what the problem could be.. maybe its Go Launcher? Maybe its lightflow? Or someway around notifications?
Click to expand...
Click to collapse
I had the same issue when I turned on douple tap to sleep in novalauncher. Once I disabled it, the fingerprint reader unlocked my phone, not taking me to the pattern screen. Its certainly a software problem, I guess it's your launcher.
I'm using a older version of Go Launcher EX (5.09). Its very old, but does the job for me.. unfortunatly it doesn't have the double tap option.
I'll try disabling it and see if th problem persists
Edit:
With the Google Now launcher, when I use this app to lock, the same problem occurs. I lock by clicking the app, but then when I try to unlock using fingerprint, it takes me to the PIN screen
https://play.google.com/store/apps/details?id=com.screen.lock.screen
If you want to use fingerprint unlock function, you need to install FingerprintEnabler xposed module. Else the fingerprint to screen on and ask for pin or pattern is the default behavior..!

Is the Fingerprint Scanner perminantly ON?

Hi Guys,
I'm thinking about buying this phone for a friend and need to understand how the fingerprint scanner works.
On my One Plus 3, the scanner is ON all the time which makes it awesome, (but probably eats battery.) :victory:
On my Galaxy Tab S2, you have to press the scanner to turn it on first, which makes the whole process much worse.
Is the scanner on the P2 always ON, (like the One Plus 3,) or does it require a press to wake it up? (like on Samsung devices.)
Thanks in advance. :highfive:
The scanner is always on.. you don't need to wake the phone to use it.. the battery drain is minimal
Sent from my Lenovo P2a42 using Tapatalk
Uibon said:
The scanner is always on.. you don't need to wake the phone to use it.. the battery drain is minimal
Sent from my Lenovo P2a42 using Tapatalk
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Click to collapse
Thanks Uibon. :highfive:
Is it a physical button? i.e. presses in, or is it just purely capacitive?
My Samsung also has an issue where if you lock the screen using an app, (Power Toggles,) you can't unlock the phone with your fingerprint. Any idea if the P2 suffers the same issue?
It's both. The fingerprint sensor is capacitive and works by just placing one's finger on it. There are also many gestures that work on the capacitive sensor like tap to go back long press to view recent apps. The button is also physical pressing it brings you to home screen and long press brings up Google assistant
Sent from my Lenovo P2a42 using Tapatalk
Uibon said:
It's both. The fingerprint sensor is capacitive and works by just placing one's finger on it. There are also many gestures that work on the capacitive sensor like tap to go back long press to view recent apps. The button is also physical pressing it brings you to home screen and long press brings up Google assistant
Sent from my Lenovo P2a42 using Tapatalk
Click to expand...
Click to collapse
Ok Uibon,
So to unlock the phone, do you just place your finger on the sensor (without pressing it down,) or do you have to press it down as well? I ask this as on my Tab S2, having to press down also results in many incorrect reads.
Its a pity Lenovo didn't put a lock screen gesture in the fingerprint scanner like One Plus. It by far the best system I've ever used. :angel:
It works like the fingerprint on the OnePlus.. just place the finger to make it work no pressing the button necessary.
Sent from my Lenovo P2a42 using Tapatalk
Uibon said:
It works like the fingerprint on the OnePlus.. just place the finger to make it work no pressing the button necessary.
Sent from my Lenovo P2a42 using Tapatalk
Click to expand...
Click to collapse
Excellent Uibon, :victory:
Just need to sort out now the issue of using an app to lock the screen and understand if this takes away the ability to unlock next time with the fingerprint.
Masteryates said:
Excellent Uibon, :victory:
Just need to sort out now the issue of using an app to lock the screen and understand if this takes away the ability to unlock next time with the fingerprint.
Click to expand...
Click to collapse
Just tried screen lock widget and it requires pin to unlock after using it. Finger does not work.
I am using nova prime and double tap to sleep and i can wake from finger print sensor iff you use timeout lockscreen method which means after you double tap the screen to lock the it screen goes black instantlly but the actual full screen lock engages after 30sec allowing the phone to screen to be locked through its own system hence the fingerprint wake works normal. I am not aware of other launchers that have this but nova prime has it.
Masteryates said:
Excellent Uibon, :victory:
Just need to sort out now the issue of using an app to lock the screen and understand if this takes away the ability to unlock next time with the fingerprint.
Click to expand...
Click to collapse
That's an Android security limitation and all phones do that I believe. I think some apps can "trick" the phone by turning the screen off and let the timeout do the locking but I'm not sure.
If you have root access then they'll work. Else they won't. It's a security feature and uses device admin rights to lock the phone. Which means the device admin should unlock it by the most secure way. That's​ pin password or pattern.
It's not device specific and hence it's nothing to blame Lenovo
dannejanne said:
That's an Android security limitation and all phones do that I believe. I think some apps can "trick" the phone by turning the screen off and let the timeout do the locking but I'm not sure.
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Click to collapse
You are correct dannejanne. Some OEM's have realised how stupid it is and have sorted it out.
On the One Plus 3, you can securely unlock the phone and relock all with one finger while your phone is on your desk. You can do this better and faster than any other phone. As it's something you do so many times a day, it's time for the other OEM's to blatantly copy this.

Using Gravity Screen to wake phone when you pick it up

I was searching for a way to make Tasker wake phone when I pick it up, so I just have to at it to unlock it. In looking into this, I discovered Gravity Screen, which amongst other things, can wake your phone when you pick it up, straight to Face Unlock. It seems to work well but I'm not sure of the impact on battery. I'm not using it to lock the screen... Really only using it for the one thing.
https://play.google.com/store/apps/details?id=com.plexnor.gravityscreenofffree
What do you all think?
saccentekennedy said:
I was searching for a way to make Tasker wake phone when I pick it up, so I just have to at it to unlock it. In looking into this, I discovered Gravity Screen, which amongst other things, can wake your phone when you pick it up, straight to Face Unlock. It seems to work well but I'm not sure of the impact on battery. I'm not using it to lock the screen... Really only using it for the one thing.
https://play.google.com/store/apps/details?id=com.plexnor.gravityscreenofffree
What do you all think?
Click to expand...
Click to collapse
I've been using this app on my last two phones in order to be able to double tap the home screen on my launcher (Action Launcher) to turn off the screen, WITHOUT locking the phone. For some reason though, this no longer works on the OP5T, double tapping just simply won't trigger the screen off shortcut. Really disappointed in this, are you able to get this to work on yours?
I do also use its proximity sensor feature so that it automatically turns the screen on upon removal from my pocket, and it turns the screen back off once I put the phone back into my pocket, which triggers the angle needed to turn the screen off. That feature still works as intended, and better yet, preps the screen for the face unlock. And as far as I can tell, hardly uses any extra battery.
Elsydeon said:
I've been using this app on my last two phones in order to be able to double tap the home screen on my launcher (Action Launcher) to turn off the screen, WITHOUT locking the phone. For some reason though, this no longer works on the OP5T, double tapping just simply won't trigger the screen off shortcut. Really disappointed in this, are you able to get this to work on yours?
I do also use its proximity sensor feature so that it automatically turns the screen on upon removal from my pocket, and it turns the screen back off once I put the phone back into my pocket, which triggers the angle needed to turn the screen off. That feature still works as intended, and better yet, preps the screen for the face unlock. And as far as I can tell, hardly uses any extra battery.
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Click to collapse
Hmmm... I use Nova Launcher and I use the double tap to lock the phone. I've never wanted it to not lock. I wasn't aware that there is a double tap action in Gravity Screen? I'll have a look.
saccentekennedy said:
Hmmm... I use Nova Launcher and I use the double tap to lock the phone. I've never wanted it to not lock. I wasn't aware that there is a double tap action in Gravity Screen? I'll have a look.
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Click to collapse
It's not really within Gravity Screen itself, you'd have to use the launcher to set up the double tap on home screen to a shortcut. From there, you can pick one of Gravity Screen's shortcuts that allow you to either just turn off the screen, or do a persistent off screen, where you have to use the power button to bring it back on. I believe the problem I had with using the double tap to lock screen feature built into the launchers is that it forces you to have to enter in a password afterwards...face unlock or fingerprint do not work.
Elsydeon said:
It's not really within Gravity Screen itself, you'd have to use the launcher to set up the double tap on home screen to a shortcut. From there, you can pick one of Gravity Screen's shortcuts that allow you to either just turn off the screen, or do a persistent off screen, where you have to use the power button to bring it back on. I believe the problem I had with using the double tap to lock screen feature built into the launchers is that it forces you to have to enter in a password afterwards...face unlock or fingerprint do not work.
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Hmmm. Not true with Nova. I double tap to lock and I can use fingerprint to unlock. However, I believe that I requires root for this lock method. Do you have root?
saccentekennedy said:
Hmmm. Not true with Nova. I double tap to lock and I can use fingerprint to unlock. However, I believe that I requires root for this lock method. Do you have root?
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Click to collapse
Nope, I don't have root. I did try the same shortcuts with Nova, and it didn't work there either.
have used the app on my old OPO.. now on 5T it's just perfect.. just pick up the phone.. and prepare for landing on homescreen without any tap or button press
does not consume a lot of battery
I've used this in the past as a way to turn on the screen when it comes out of my pocket
https://play.google.com/store/apps/details?id=com.tf.wakeongesture
This application wakes up your phone, and it works well on my OP5T, it's called "Always on AMOLED"you can download it from F-Droid open source apps, Yalp Store and Google Play. I like that it is low on resources, double tap wake up screen option, lock screen clock, date, battery, custom message and notifications.

Understanding the proper use of Face Unlocking

With the Face unlock you need to have some kind of primary unlock. After I have the Face Unlock, why is it asking for my pattern unlock? Sometimes I see the silly face and sometimes I see the lock
What are your thoughts?
Thanks
67 views and not one thought?
pbman1953 said:
With the Face unlock you need to have some kind of primary unlock. After I have the Face Unlock, why is it asking for my pattern unlock? Sometimes I see the silly face and sometimes I see the lock
What are your thoughts?
Thanks
Click to expand...
Click to collapse
When is it asking for pattern unlock? If you are using for secure payments like Google Pay, it asks for pattern or fingerprint unlock as face unlock on 7T is not secure....Face unlock on 7T can only be used to unlock the device and nothing else...
Here's an example I just did. The phone is on my desk and dark. I picked up the phone, double tapped to wake the phone to the lock screen. I see the lock on the screen instead of the face icon
pbman1953 said:
Here's an example I just did. The phone is on my desk and dark. I picked up the phone, double tapped to wake the phone to the lock screen. I see the lock on the screen instead of the face icon
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Click to collapse
Using your example, when I double tap the screen it awakens the ambient display, showing me the time and any notifications that are on the screen. Also, the fingerprint scanner is active and lit up. I believe this is the intended behavior. The double tap simply wakes the ambient display.
If you want face unlock to kick in, you should press the power button.
One Plus told to switch to a pin instead of a pattern and it seems to work better. But you suggestion of using the power button is also on par, Thanks!
This problem also frustrates me. The issue is that the time out for face unlock to search for a face is WAY TOO SHORT.

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