4.2 lock screen bug (music controls) - Nexus 4 Q&A, Help & Troubleshooting

Is it just me? Or is anyone else having problems with music controls on the new lock screen in 4.2. when I resume a song from play music in the lock screen the the camera gets mixed in with the lock screen and the volume goes to maximum for a second then returns to normal. Its done it a few times now.
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Mine just covers the unlock button sometimes, just a new software thing, it will be fixed
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Yea that's sort of what mine dose plus the outburst of sound when I've got earphones in
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I had this happen just a little bit ago at the gym. It almost seemed like it locked up. I was able to launch Google now and get to the main screen though. Hopefully they add an on/off button for the lock screen widgets, I won't ever use them so it would be nice to disable them.
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Disable Lock Screen Camera and Widgets
Found an article by Droid Life about Lockscreen Policy, an app created by Chislon Chow.
Been using it for a couple days. It is free and seems to work perfectly fine. Did not even need root privilege. The effect is not "permanent" in that if you disable/freeze or uninstall it, the widgets come right back, and you'll have to reboot before they can be removed again.

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Problem unlocking N7?

Has anyone gotten this problem? Sometimes, when I try to unlock my Nexus 7, it doesn't actually unlock and turns off the screen. This happens several times before it finally does unlock. (Sometimes you have to activate Google Now before it will unlock) I would like to report this to Google but I am unsure how to do that by email. Just wondering if anyone else had this problem too. Thanks!
Surely someone must have had this problem too.
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Nope, are you on a custom ROM or kernel?
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No, not even rooted. It seems to happen most frequently with third party apps.
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Maybe it is a problem with the third party app? ...
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I've noticed it especially with skpye, but it has happened with stock apps like chrome and gmail too.
EDIT: just had it happen with the Twitter app. It seems it goes to sleep earlier than it should when the unlocking problem happens.
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I had the same issue. Let me guess...you have a folio case with the magnetic smart cover feature?
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No problem here...
I also at times have problems with the unlock screen.
The lock screen at times is just in a frozen state.
To fix I press the power button to turn of the screen and hit it again to turn back on the screen.
The lock screen then functions as usual.
Note: This happens even when I have no apps open.
Well as it turns out, a lot of the folio cases with the sleep/wake function use magnets that are too powerful. When the case is folded all the way back, the magnet is activating the sleep function. I almost sent my tablet in for RMA but then I realized it was the case. If it happens again, just let the flap hang and you should be able to unlock your device hope I helped.
Vugari said:
Well as it turns out, a lot of the folio cases with the sleep/wake function use magnets that are too powerful. When the case is folded all the way back, the magnet is activating the sleep function. I almost sent my tablet in for RMA but then I realized it was the case. If it happens again, just let the flap hang and you should be able to unlock your device hope I helped.
Click to expand...
Click to collapse
I do not have the smart case and I have a frozen lock screen issue.
LCD often has wake up lag.
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I have a folio case. Never thought that could be the issue. I'll try letting it hang freely from now on. Could someone tell Google about this so they can release an update to fix it? (since people without the case are having the same issue)

Momentary black screen

Anyone had this one? Since 4.2, the screen momentarily goes black, with a similar transition to hitting the task manage soft key, but transiting to the left in landscape, then flicks back to normal use. Happens in apps...screws up some games, puts others into pause mode as if a task has been switched. Thought it might have had something to do with auto rotation going a bit bonkers, but not sure....
Not heard any reports...have looked through the forum, couldn't find anything.
Weird...it just did it then....but the keyboard stayed on screen, xda disappeared to the left...
Any thoughts and thanks in advance
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Thank God! Thought it was just me!
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Ok..just happened again while in portrait mode. Definitely saw it flick to landscape. Rotation is locked btw.
Hmmmmm.....
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It happened to me three times last night after update to 4.2 :crying:
Ok...so, while sitting in a tedious meeting, Nexus in landscape, propped up with its folding case the screened flipped upside down and stayed upside down. 3 times. My ipad using colleague giggled.
Any way to recalibrate the tilt sensor? Or any other suggestions?
It's not the end of the world but...there must be a patch solution or other? Before 4.1 I used the auto rotate app, I forget its correct name...
Thoughts?
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I used logcat to monitor the Nexus 7 until the random rotation happened. After looking at the log I realized that it was always the same process being activated and that process was nVision.
Since nVision always rotates into landscape mode I was suspicious that perhaps when it tried to update itself in the background it was changing the screen orientation. I disabled notifications and then uninstalled the app and the problem has completely gone away. I have had no random rotations at all in the last 24 hours.
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Thanks very much. Ill give it a try and report back
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Okie doke.
For the record.... 48 hours and no random flips to landscape and back. I'd be willing to be a substantial amount of money this was the culprit. However, whether this is a 4.2 issue per se vs. Bad behavior in nVision is an open Question.
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Ok. Disabling nvision notifications still flips out. Will uninstall later.
Thanks again
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Uninstall it. I still think it checks in and screws your screen, whether it shows you the notification or not.
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Uninstalled...all good so far. Woooooo!
Cheers!
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N7 Not Recognizing Touch EXCEPT Notification and Navigation Bars

I have three users configured and at times the tablet seems to lock up. But I can still pull down the notification drawer and setting drawer. I can touch the back, home, or multitask softkeys, or slide up for Google now.
But no matter where I navigate to, the N7 does not register touches in the "screen" area.
I have found that pulling down the setting drawer and tapping the user to "logout" and then logging back in immediately fixes the issue. Also toggling sleep/wake button and logging back in also fixes it.
Is this a known issue? Is this multiuser, software or hardware specific? Any solutions?
(I read back through a couple weeks of posts but didn't see this issue)
--- UPDATE------
Just happened again. But I left it alone for a minute, picked it back up and it was working fine. Perhaps this is app lag. The notification and navi bar work because they're systems but the screen stops taking input while it lags....(just a thought, I don't know how that stuff might work)
BTW I have a 32 GB N7, it is not rooted, and is fully up to date running 4.2.1
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Im having the same issue with mine..just got it afew days ago and it just started about an hour ago. I think its a screen issue cause now it keeps coming up with the menu to change wallpapers without me touching it. And its been locking up alot. Might have to RMA it.
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RMA it? Is yours rooted? Do you have multiple users?
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Do you have an otg cable? Try connecting a mouse to it when it does this and see if it recognizes mouse actions.
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if youre rooted, try a different rom, i had similar problems, but when i flashed cm10.1 it's gone. btw why is this topic in general not q&a?
Billchen0014 said:
if youre rooted, try a different rom, i had similar problems, but when i flashed cm10.1 it's gone. btw why is this topic in general not q&a?
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Click to collapse
This is not a question it is an issue with the device. This is appropriate for general.
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AFAinHD said:
Do you have an otg cable? Try connecting a mouse to it when it does this and see if it recognizes mouse actions.
Click to expand...
Click to collapse
I do not have an otg cable.
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Damn. Well maybe get a log cat next time it happens. Maybe there will be something there to show why it stopped working.
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I'll have to learn how to get a logcat. But I was able to recreate the issue and get a video. I could only get it to affect settings and the play store but I've had this in the launcher before too. I don't think you can hear but tapping the screen was causing the touch sound.
Video: https://www.youtube.com/watch?v=y6xMYUxYv9k&feature=youtube_gdata_player
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ShadowOf said:
Video: https://www.youtube.com/watch?v=y6xMYUxYv9k&feature=youtube_gdata_player
Click to expand...
Click to collapse
No one has had this issue? I've only experienced it in Settings and PlayStore on me first and second user, nothing on my third user. Also noticed a litte lag on the homescreen too.
In the video you may be able to hear the touch feedback sound. The screen is recognizing taps but not doing anything. Sleep/Wake fixes the issue until you leave the app...
Guess I'll need to exchange my N7 and hope to get one without this issue.
Why did this get moved to Q&A??
Are Issues not discussed in General?
[SOLVED]
I was using APP LOCK on User #3 and that caused what seems like an overlay that prevented touch on users 1&2.
I sent this issue to the apps support. And will try to find a free app locker that is milti-user friendly.
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[Q] Nexus 4 Power Button Sinking into Housing?

Hello guys,
After awhile of using the phone, I feel the power button sinking more and more into the housing. There is a lot less distance to click from now. From time to time (not often) pressing the power button does not wake the phone but that's rare. Anybody having the same issues? Should I RMA?
The N4's hardware buttons are pretty "thin", if that makes sense. If you're worried, you could try something like Screen Off & Lock (https://play.google.com/store/apps/details?id=com.katecca.screenofflock&hl=en) to reduce the number of times you press the power button. I currently have a gesture set up in Apex Launcher to launch Screen Off & Lock, and it works nicely. I imagine you could do similar things with Tasker or GMD GestureControl.
I installed CM 10.1. It has option to wake the screen with the Volume Rocker.
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Yeah I've noticed it on mine too.
It was very harder and more out when I got it. It'll probably stop sinking when it reaches a certain point.
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Not used it for a while but I'm pretty sure widget locker lets wake the phone with the volume keys.
As someone else said it will stop dining after a certain point. I noticed the same thing on the gnex too
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Nexus 4 Bugs

I want to ask if anybody has similar bugs to a non-rooted, locked, stock nexus 4 on 4.2.2 and would like to know on how to fix them. I have factory reset the phone and always seem to get the same results. I don't mind these little bugs, but they are making me want to root my phone.
1. While listening to Google music, I would try to unlock my phone and Google music screen widget would flicker and shake and make unlocking difficult I provided the picture on the attachment.
2. Another bug while still listening to Google music; it would dim more than normally it would in a shorter amount of time on lock screen.
3. Almost every time I open YouTube, the YouTube window animation flickers.
4. Battery drops 2-5% when the phone is rebooted.
5. Phone battery % drops after being fully charged and unplugged.
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4 and 5 are caused by a slightly wrong calibrated battery if you reset the calibration files (here is a tut somewhere) or just do only full cycles for a few weeks this shouldn't be a problem because it is just a displayed drop I think I'm rooted and don't listen much to Google music so no comment to 1 and 2.
3 isn't known to me.
Just a quick answer haha
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Thank you, I'm going to look on how to properly calibrate the battery. These little bugs can get frustrating at times.
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Don't know about 1 and 2.
3) The youtube app is a buggy piece of sh*t, so I wouldn't sweat it too much.
4) The battery percentage drop on rebooting has occured on every ROM I tried so far, so I don't really care. Well, maybe not 5%, but 1-2% is normal for me.
5) Happens to me occasionally, I don't really mind if it drops to 99% straight away, it's only correct. 100% would mean that your battery is perfectly fully charged. When you unplug it, some tiny (seriously) amount of power is being used due to the fact that your screen turns on, right?
Try cleaning the app data and cache for Play Music and Youtube (settings > apps) and see if it gives any result.
Thank you for helping. I forgot to mention another bug that is probably the worst. When receiving a phone call, I pick up the phone and the screen turns off. I try to turn the screen on and it doesn't respond. This bug has made me miss calls various times.
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reiko09 said:
Thank you for helping. I forgot to mention another bug that is probably the worst. When receiving a phone call, I pick up the phone and the screen turns off. I try to turn the screen on and it doesn't respond. This bug has made me miss calls various times.
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Click to collapse
Mh well your on/off presses sometimes interfere with the proximity sensor on your phone this "issue" sometimes causes wild screen on/off during call because I click the button but the screen was already turning on because I no more held it next to my ear so it turns off again so I click again to turn on but hold the phone to my ear shortly to check whether the other person is still in call so proximity sensor reacts.... Repeat n-times. But that doesn't sound like your problem. Could you describe it more specific?
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When receiving a phone call, I pick it up the phone and the screen turns off and doesn't respond to the power button. I have to tilt the phone until it turns on and until I get a chance to answer the call. Proximity sensor/s does sound to be the cause of this. Any way to fix this?
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Phew I don't think so... But changing habits... I'm working on a solution for my random clicking but I think the only way to solve that is to give the phone more time to react before pressing power button because it'll turn screen on/off as you would like it to but it needs a short period of time for that
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Hopefully Android 4.3 fixes some of these bugs. The Nexus 4 Lg adapter was garbage, I dropped it once and after that it stopped working.
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1 & 2 Yes!
I told Google about this back in February.
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What did Google say? Its frustrating listening to music and having this happen.
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reiko09 said:
What did Google say? Its frustrating listening to music and having this happen.
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Click to collapse
They said to clear cache/data & uninstall updates. Then update.
It did not work. I told them & they said they will Look into fixing this issue in a update later on.
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Yeah, uninstalling and updating apps doesn't work. I've been doing that since the longest and no fix. Factory resetting or even flashing stock doesn't seem to fix these bugs either. Hopefully later on they find a solution. I didn't mind these bugs at first, but after a while, it got frustrating.
reiko09 said:
I want to ask if anybody has similar bugs to a non-rooted, locked, stock nexus 4 on 4.2.2 and would like to know on how to fix them. I have factory reset the phone and always seem to get the same results. I don't mind these little bugs, but they are making me want to root my phone.
Click to expand...
Click to collapse
1. While listening to Google music, I would try to unlock my phone and Google music screen widget would flicker and shake and make unlocking difficult I provided the picture on the attachment. Don't use the lockescreen and/or the music app. Google play music works fine on my end.
2. Another bug while still listening to Google music; it would dim more than normally it would in a shorter amount of time on lock screen.
Don't notice this because I always sleep the phone manually after choosing music.
3. Almost every time I open YouTube, the YouTube window animation flickers.
Never have experienced this.
4. Battery drops 2-5% when the phone is rebooted.
This can happen, yes. Stop rebooting so much.
5. Phone battery % drops after being fully charged and unplugged.
This happens about 95% of the time. Nothing to worry about.
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Thanks for your reply. For the Google Music apk, I don't use any lock screen widget. When I listen to the music and try to unlock it, that's when it gets buggy. Either the widget shakes or the screen dims more than normally it would. I only reboot I once a day every morning in order to reduce lag and refresh the system.
I guess I don't know what you mean with the music app. What Rom are you on?
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I'm on stock rom, unrooted and locked. I was on cyanognemod, unofficial miui, and decided to go back to stock. I have enjoyed stock until bugs started happening. When I listen to Google Play Music; there are times when I turn my phone on and try to unlock the screen, the Google Music widget shakes and makes it difficult to unlock.
Found another bug. Not annoying but its just there. When applying a stock wallpaper and you immediately scroll left or right, you get this result.
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May be it's just the universe trolling you saying "one does not simply not root a nexus".
Yes most of the bugs you mentioned are present and they are fixed in most of the custom ROMs.

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