Delayed Lock Screen - Nexus 7 Q&A, Help & Troubleshooting

With my settings set to Automatically lock (immediately after sleep) and power button instantly locks with a visible patter screen lock, my Nexus 7 on wake-up [pushing the power button immediately] either right after an invalid pattern code (where device then sleeps) or waiting a few seconds with no activity until the device sleeps (where the Nexus 7 fades to a black screen) will have a delay in bringing up the lock screen OR sort of flicker presenting some sort of black and white bar lines background at the bottom half of the screen for a split second before bringing up the lock screen. In essence, when waking the phone from sleep, the screen "glitches" for like a fraction of a second where the "glitch" is a set of white lines that flash on the screen before the lock screen appears on the display. This "rarely" occurs and has to be done fairly quickly, but I have seen it a few times as I continuously tried it over and over again; you can blame my OCD Anyway... I was wondering if this is normal or it is in fact a defect? It doesn't seem to affect the performance of the device itself.
The following are video recordings of the "issue":
http: //youtu.be/lFhr0DxhA_Q
http: //youtu.be/yTmrWgBoAjQ
Does this happen for anyone else?
Thanks in advance!

Praesidium said:
With my settings set to Automatically lock (immediately after sleep) and power button instantly locks with a visible patter screen lock, my Nexus 7 on wake-up [pushing the power button immediately] either right after an invalid pattern code (where device then sleeps) or waiting a few seconds with no activity until the device sleeps (where the Nexus 7 fades to a black screen) will have a delay in bringing up the lock screen OR sort of flicker presenting some sort of black and white bar lines background at the bottom half of the screen for a split second before bringing up the lock screen. In essence, when waking the phone from sleep, the screen "glitches" for like a fraction of a second where the "glitch" is a set of white lines that flash on the screen before the lock screen appears on the display. This "rarely" occurs and has to be done fairly quickly, but I have seen it a few times as I continuously tried it over and over again; you can blame my OCD Anyway... I was wondering if this is normal or it is in fact a defect? It doesn't seem to affect the performance of the device itself.
The following are video recordings of the "issue":
http: //youtu.be/lFhr0DxhA_Q
http: //youtu.be/yTmrWgBoAjQ
Does this happen for anyone else?
Thanks in advance!
Click to expand...
Click to collapse
*Bump*

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Lock Screen won't turn off

Hi there. I'm currently having an issue with my S7 edge where the lock screen won't turn off after some time. The screen does turn off when I'm using the phone normally from the main screen after some time passes but it's just the lock screen I have issues with.
Whenever I charge my phone or just hit the power button once to see notifications on the lock screen, it'll just stay like that until the same time the main screen timeout configured time passes (5 minutes) and this is getting annoying and somewhat draining a little bit more of my battery. Previously it was working fine and the lock screen would turn off after around 10 seconds or so.
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Clear Background apps.
It happens when you left some games or apps by pressing home button but it keeps running. Hope they will fix this soon.
Have you tried pressing that little button on the right side of the phone? That usually helps.
Yeah...I already tried that with no luck. Even tried uninstalling some recent apps in case one of them was cause but it didn't work either. Any other suggestions?
The issue isn't with turning the phone screen off by pressing the power button, it's the lock screen itself not turning off after a few seconds when it usually does.
I'm having the same problem, had good lock installed thought that may have been the problem but after uninstalling that I'm still having the same problem with samsungs oem lock screen. I too would like an answer or fix for this. also to note, in developer options the stay awake is off and no apps running in the background.
I am having this problem now also. The screen will lock, but the display stays on but dimmed. I can tap the screen and it will get bright. Now I must click the side button every time I set my phone down or the screen will drain the battery.
I'm facing exactly the same issue. When the screen is locked, it stays on for the same time confirmed to when its unlocked. For example, 1 minute, instead of 10-15 seconds.
Any workaround discovered for this?
Did anyone find a solution to this problem?
I thought that I might've been the only one! This problem only appeared on my phone after the Nougat update, and it's extremely annoying as I rely on notifications waking the screen for my main messaging app.
joelnet said:
I am having this problem now also. The screen will lock, but the display stays on but dimmed. I can tap the screen and it will get bright. Now I must click the side button every time I set my phone down or the screen will drain the battery.
Click to expand...
Click to collapse
Hello, I am having the same issue in my Redmi note 11 pro plus Phone. In my case The screen will lock but display stays on with dimmed light. Usually it is not visible during day, but in dark room its visible. And it stays the same way whole night. And battery is fully drained and phone is turned off. Is there a solution for this??

LG V20 Main Screen Randomly Turns On

Hi,
I've found a lot of posts about the second screen but not for the main screen.
I have a LG V20 US996 unlocked and rooted. I also have a case that covers the sides and back.
I usually wear t-shirts with a deep chest pocket (Carhartt) where I keep my phone, screen in. When I'm outside working listening to music on bluetooth headphones (mostly with Poweramp), the main screen randomly turns on. I notice this when the music starts jumping or skipping tracks because my chest is now randomly pressing spots on the main screen. When I look at the phone, what's on the screen is always some random app that started. It doesn't seem to correspond to any notifications as it does it when there are none. The default second screen when the main screen is off is the date and time.
I tried completely disabling the double-tap to turn on and off the main screen (both in the android and Nova Launcher settings) but that didn't help. Nor did making sure the phone was locked as a few seconds later, the main screen would turn on again.
Am I missing any other settings or secret screen presses that might turn the main screen on? If not, does anyone know of an app or Xposed module (if it's available for the V20/Nougat; I haven't checked yet) that might turn off the main screen except when explicitly turned on?
Thanks!
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feretio said:
Hi,
I've found a lot of posts about the second screen but not for the main screen.
I have a LG V20 US996 unlocked and rooted. I also have a case that covers the sides and back.
I usually wear t-shirts with a deep chest pocket (Carhartt) where I keep my phone, screen in. When I'm outside working listening to music on bluetooth headphones (mostly with Poweramp), the main screen randomly turns on. I notice this when the music starts jumping or skipping tracks because my chest is now randomly pressing spots on the main screen. When I look at the phone, what's on the screen is always some random app that started. It doesn't seem to correspond to any notifications as it does it when there are none. The default second screen when the main screen is off is the date and time.
I tried completely disabling the double-tap to turn on and off the main screen (both in the android and Nova Launcher settings) but that didn't help. Nor did making sure the phone was locked as a few seconds later, the main screen would turn on again.
Am I missing any other settings or secret screen presses that might turn the main screen on? If not, does anyone know of an app or Xposed module (if it's available for the V20/Nougat; I haven't checked yet) that might turn off the main screen except when explicitly turned on?
Thanks!
-Jeff
Click to expand...
Click to collapse
If you're using the second screen, it too can turn the screen on, particularly anything that launches an app or long pressed on something on the second screen. Unless of course you're not using the second screen?
Critical Detox said:
If you're using the second screen, it too can turn the screen on, particularly anything that launches an app or long pressed on something on the second screen. Unless of course you're not using the second screen?
Click to expand...
Click to collapse
The proximity sensor should turn off the second screen when covered, along with disabling knockon and requiring you to push power button twice just to wake the screen(try this out at home). If for some reason this doesn't occur, you probably have a defective model.
It does appear to function the way you describe. If I double-tap the second screen, it turns on. However, if I cover the proximity sensor, the second screen turns off, double-tapping doesn't turn anything on but as you said, I need to press the power button on the back twice to turn it on.
Every now and then when I peek into my pocket, the second screen is indeed off. I need to pull the phone out enough for the second screen to come back on to see the time. I'm still not sure what might be turning the main screen on while it's in my pocket, though.
-Jeff

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