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Last night I was reading Twitter before going to bed when I noticed that my GPS kept ticking on and off after I'd posted an update (I let my Twitter app access GPS to assign my location to tweets). Thinking that odd, I rebooted.
Talk about the reboot from hell.
Approximately 30 seconds after booting back up, the phone locked: I could tap buttons and feel haptic feedback, but no changes to the screen occurred. I eventually got the bright idea to lock it and unlock it; pressing the lock key blacked the screen, but pressing it again did not bring the screen back. Scared, I eventually pulled the battery and started up again.
It happened again. And again. In the midst of all this, I slowly learned a few things: it wasn't tied to any of the new apps I'd installed (I had enough "functional time" each boot to uninstall a couple of things), it wasn't tied to internet connectivity or GPS (I had time to turn both off), and the SGS3 has a dev option to monitor CPU usage of various apps/threads. That little HUD, which overlayed everything else, would remain updating through a lockup, and I found that a process named "df" was starting up and immediately sucking up the entire CPU and not letting go.
I eventually found that it worked the processor so hard that the phone would overheat if left alone and "soft reboot" (OS restarts, but no Verizon/Samsung loading screens), so I was able to at least stop pulling the battery!
Finally, I turned it off and let it cool down for a few hours whilst Googling: no results anywhere for a similar problem or regarding the "df" process. Turning the phone back on after its reset didn't help at all. The lockup time was so quick that I couldn't even initiate a factory reset--it would lock up in the midst of preparing to perform it!
I eventually restarted it into the bootloader (meant to go for recovery, oops) to poke around and got a really scary image: a "Custom" screen before the bootloader starts that the devs are saying means that system apps/files have been modified. Now, since I don't have root yet (no hacking/voiding warranty JUST yet), I am not ABLE to modify system apps, which means that something got tweaked all by its lonesome, and THAT isn't supposed to happen. It was probably what was causing the lock, though--some driver somewhere that's supposed to say "Processor, don't try to calculate pi to infinity" got hosed or whatever.
I eventually got into stock recovery and was able to initiate the factory reset from there without the use of the actual OS (thus avoiding the hard lock). The phone rebooted fine, let me sign into Google, and spent the rest of the night redownloading apps. It's fine now.
EXTREMELY worrisome. Possibly a hardware fault with the EMMC chips holding my OS or something--there's not a lot that can knock out system files on a non-rooted device. At least it doesn't appear common, insofar as all my Googling leads to no results at all.
Any ideas as to what the heck happened?
Apologies in advance for the potentially vague description, but I also cannot find a solution elsewhere on the forum.
Earlier today, I was watching a YouTube video and then I locked my phone and left it to charge whilst I went downstairs (as I often do). When I returned roughly an hour later, I found the screen on, which I only ever do if I've left Draw Something open, or some similar app - but it was on the lock screen.
(none of that is necessarily important, I just wanted to clear up the "what did you do to make it start rebooting" question)
Anyway, after unlocking the phone, the screen went to black and the phone restarted.
However, it wasn't a "real" reboot, because the boot screen didn't come up, etc. It's just like just the UI is restarted. I can usually use the phone for about 30 seconds at a time. This seems extended when I have flight mode on, and is even longer still when I have the phone locked.
I've uninstalled some potentially-offending apps, removed the SD card, cleared some apps' data, but to no avail.
I'm using default 4.0.4 from Samsung. The only issues I'd had with it until now were that some apps crashed occasionally, but I attributed that mainly to the apps themselves.
The most annoying thing for me is that is seems like it's an issue that can be fixed quite simply, without having to uninstall every app or factory reset the phone.
Anyone have any other ideas as to what I could do? Thanks!
RobHannay said:
Apologies in advance for the potentially vague description, but I also cannot find a solution elsewhere on the forum.
Earlier today, I was watching a YouTube video and then I locked my phone and left it to charge whilst I went downstairs (as I often do). When I returned roughly an hour later, I found the screen on, which I only ever do if I've left Draw Something open, or some similar app - but it was on the lock screen.
(none of that is necessarily important, I just wanted to clear up the "what did you do to make it start rebooting" question)
Anyway, after unlocking the phone, the screen went to black and the phone restarted.
However, it wasn't a "real" reboot, because the boot screen didn't come up, etc. It's just like just the UI is restarted. I can usually use the phone for about 30 seconds at a time. This seems extended when I have flight mode on, and is even longer still when I have the phone locked.
I've uninstalled some potentially-offending apps, removed the SD card, cleared some apps' data, but to no avail.
I'm using default 4.0.4 from Samsung. The only issues I'd had with it until now were that some apps crashed occasionally, but I attributed that mainly to the apps themselves.
The most annoying thing for me is that is seems like it's an issue that can be fixed quite simply, without having to uninstall every app or factory reset the phone.
Anyone have any other ideas as to what I could do? Thanks!
Click to expand...
Click to collapse
just go to recovery mode and fix permissions
I posted this in the A500 forum as well, but it's probable that this is not a problem limited to my device, and it's also possible that there is a rom that might help me out.
I purchased my tablet on the day it came out, so it's long out of warranty. Everything has been fine with it until three nights ago.
I woke up in the morning to a crashed app alert. I don't get crashed apps often, but it does happen, so I hit ok. A few seconds later I was inundated with crashed app alerts. At that point, any app I opened would also crash immediately. Figuring a good reset would fix it, I turned it off...and it wouldn't turn back on.
I did finally get it to start by holding the volume up and power button.
But that didn't fix the problem. I've discovered that it is somewhat stable if I keep wifi off, but if wifi is on, within minutes everything starts to crash again.
I tried uninstalling some of the apps that crash, but when I restart, the apps are back. It doesn't matter what I uninstall, when I restart, it's back. Installed apps also disappear, the wallpaper resets...basically nothing I do sticks once I restart. I tried to factory reset using the button combination required for my device, and the screen gives the "erasing user data" message, but when it loads up, everything is just as I left it. I tried using the android os option to factory reset, but when I hit "erase everything", the button depresses, but nothing happens.
So obviously, I'm a bit perplexed.
I've never rooted it, and I ran an anti-virus scan a few hours before this all happened and it came up clean.
Anyone ever experienced this? Any advice? If no one has any ideas one how to fix it, is there a way to bypass the main os completely with a rom? I have absolutely no idea how those work, so it may be obvious that it won't, but I figured I'd check.
Thanks in advance! And thanks for reading this far, even if you have no advice!
Has anyone experience the second screen not working all of a sudden? Mine is just dark with the main screen both on and off. I tried toggling the second screen on and off from the setting, reboot, battery pull, and wiping cache and dalvik but so far none worked.
It's not a hardware issue, I think, because when I open the camera, the second screen comes on for the camera Settings. Also, when in twrp, the second screen is also on as a part of the whole display.
EDIT: I can actually see some light bleed from the second screen with the main screen off. It's just not displaying information it should for some reason.
Sent from my LG-H901 using Tapatalk
I just got mine, and something I did in the course of adding/changing/modding did the same - I lost my second screen when the phone was off, but when it was on I had my shortcuts. I wound up factory resetting and re-installing/re-configuring my apps... knock on wood, everything works just fine now. I think mine failed when I unfroze an app in Titanium that it marked for me.
About the only thing that I did before I lost the second screen is installing a game from the play store. I have uninstalled it, but still no luck. I most likely will factory reset and if that doesn't work, I'll flash stock rooted rom... And set my phone up yet again.
Sent from my LG-H901 using Tapatalk
Same symptoms
I am on stock, albeit rooted. I froze a few apps, but I have also rebooted multiple times before the second screen disappeared, so I am not sure how anything I have done this far could be the cause.
Because I saw I am not alone, I started to do some digging. It looks like the app is located in /data/data/com.lge.signboard, which actually has symlinked directories. Not sure if its a clear indicator of the issue, but most of the directories are empty. Definitely odd.
I'll load up SSHd later and see if I can investigate more.
Did the factory reset and now the second screen works. I'm sincerely hoping that this is not a regular occurrence. I haven't liked a phone so much since galaxy s2.
Sent from my LG-H901 using Tapatalk
I also had my second screen go funky. Haven't factory reset but I'm going to. It seemed to happen as I was also defrosting and refreezing some LG things, mainly services and such and not apps that you interact with per se. At right about the same time I noticed something else strange. When plugging the phone in, it takes several seconds for it to realize it whereas before it used to be instant. Also, the camera is very slow to load and change from the front to the back ones.
So I got a little bored
And fired up adb logcat to see if I could find anything. I don't yet know if it's related or not, but there is a message
Code:
I/[SystemUI]MiniStatusBar( 5541): signBoardWindowShow() requested but unavailable. Hide MiniActivity.
that shows in the log.
I to tried clearing cache and dalvik or art or whatever to try to get the second screen back no avail.
I'm having the same issue. Any update on this?
I too am interested in this, I had this issue occur too when I froze some applications (system apps) that I didn't think were necessary. Unfortunately once you freeze the component it blocks the screen and unfreezing everything back does not bring the screen back you have to factory reset it. Any ideas of what the service is that affects the second screen?
Second Screen symlink busybox
After reading all your comments on what you could have done to cause the second screen from working, it looks like the symlink is broken especially if you have updated your busy box. I too started to have the second screen go bad on me and I couldn't figure it out until I read this thread especially the log post. I am going to reset and ensure that smart install is set right in busy box.
Recently, the AT&T LG V10 (H900) just got root here: http://forum.xda-developers.com/att-lg-v10/general/root-lg-h900-real-tot-make-tungkick-t3336317
I then debloated the V10 on firmware H90010f with Debloater v3.90 here: http://forum.xda-developers.com/android/software/debloater-remove-carrier-bloat-t2998294
Before, I decided to have the second screen off for a while, so I disabled it in the system's menu. I then advanced towards debloating. Decided to turn on the second screen again. Notice that there were issues with it. So now I'm currently experiencing this issue: the second screen does not show date, time, weather, notifications, quick icons. Only shows quick toggles if I swiped from right to left, such as sound profile, WiFi, flashlight, and camera. I undo all of the debloating, rebooted the phone many times, still the same problem. Sigh. I'm trying to avoid doing factory reset because I'm not up to reloading everything again, especially the SMS/MMS.
So, anybody found out a better solution other than doing a reset?
Update 1: It seems like re-rooting with updating the ROM with the "upgrade" option for the AT&T LG V10 to not do a full clean install does not solve the problem. I didn't lose all my personal data, but I did not gain anything that it restored system apps to previous default settings. Sigh, it's just one step closer to just do a factory data reset.
Update 2: There appears that other things were broken from disabling/removing apps (during phone calls, cannot multitask, such as switch apps or use the notification area; SuperSU couldn't generate a log correctly), so I went ahead and did a factory reset since there was no alternative restoring method. The second screen works again and so does the said apps. Looks like I'll have to be careful which apps I'll be disabling/removing with Debloater.
Uninstalling an app restored my second screen.
I had this issue as well. Camera controls were in the second screen space, the swipe to end call would appear, but none of my other settings stayed long after restarting my phone, maybe 10 min. I uninstalled some of my most recent apps, the suspect one being "Zooper Widget Pro" and the issue stopped. No factory data reset etc. This app was a launcher-type app (I'm a geek but nowhere near the tech terms used elsewhere on this site) and I thought it might be the issue due to its ability to control the home screen. I doubt it was intended to work with this arrangement. So I would look at any launchers or apps which can control the home screen before doing a reset as this exact issue was easily solved for me.
I just got the phone and set it up. the only thing I disabled was ATT bloatware nothing else. 2nd screen is only on when main one is on. Using nova launcher. I tried uninstalling and that didn't help. Is there any more info on this, can I get it working without factory reset ? I get no indication of notification right now other than sound.
I did factory reset and that didn't help either.
I have a same problem with the second screen to. So anybody can help me!
Is there anyone can help me pls!!!
I solved this problem by checking PINs on mainboard for the second Flex Cable for LCD of LG V10, see the video, READ comments here https://www.youtube.com/watch?v=hpeVAqgU94s, so in my case one of three PINs was folded little, so one PIN contact didn't touch the second Flex Cable and this caused the problem...
I understand if this is too broad a question, but on the off-chance there is at least a broad category of problems anyone could point me to...
I've had a problem with the phone after asking a third party file managing app to look for duplicate files (usually quite a long operation). It failed to complete, and since then nothing has been working on the phone and it keeps restarting. The weird thing is (or at least weird in my experience). It hasn't frozen or crashed. It's just that everything seems to be finding it hard to do anything. It's exactly the same in safe mode.
I turned on some developer tools (CPU indicator and notification for unresponsive apps). I don't really know what the CPU indicator is showing me (having no point of reference), but it spiked very quickly one time to cover almost the whole screen then calmed down to sit about a quarter along, so I'm presuming CPU usage is far from full. The unresponsive app notification is more telling as every minute or so a new app comes up with "... is not responding. Would you like to close it?". Basically everything is not responding.
I also tried checking running apps and cached processes, the third party app is not still running, just the usual set of background Google apps.
I can't do any USB debugging or software repair because "USB connectivity is not responding". I can't uninstall or re-install anything because "Settings is not responding" and "Google Play is not responding". I can't even use certain developer tools because many of those are "...not responding"
I realise this means I'm probably out of options, but before a factory reset (or the bin!) I'd just like to try and understand what could have happened. At least I could possibly avoid it next time.
Just to add - I've just done a Factory Reset. The problem is still there, apps don't respond, I can't uninstall anything, USB connection doesn't respond (or does respond but keeps dropping out) and after a while it will spontaneously restart. How on earth can one operation do this to a phone?
malware?
Isaac34 said:
I've just done a Factory Reset. The problem is still there, apps don't respond, I can't uninstall anything, USB connection doesn't respond (or does respond but keeps dropping out) and after a while it will spontaneously restart. How on earth can one operation do this to a phone?
Click to expand...
Click to collapse
Start by mentioning your device.
Isaac34 said:
I understand if this is too broad a question, but on the off-chance there is at least a broad category of problems anyone could point me to...
I've had a problem with the phone after asking a third party file managing app to look for duplicate files (usually quite a long operation). It failed to complete, and since then nothing has been working on the phone and it keeps restarting. The weird thing is (or at least weird in my experience). It hasn't frozen or crashed. It's just that everything seems to be finding it hard to do anything. It's exactly the same in safe mode.
I turned on some developer tools (CPU indicator and notification for unresponsive apps). I don't really know what the CPU indicator is showing me (having no point of reference), but it spiked very quickly one time to cover almost the whole screen then calmed down to sit about a quarter along, so I'm presuming CPU usage is far from full. The unresponsive app notification is more telling as every minute or so a new app comes up with "... is not responding. Would you like to close it?". Basically everything is not responding.
I also tried checking running apps and cached processes, the third party app is not still running, just the usual set of background Google apps.
I can't do any USB debugging or software repair because "USB connectivity is not responding". I can't uninstall or re-install anything because "Settings is not responding" and "Google Play is not responding". I can't even use certain developer tools because many of those are "...not responding"
I realise this means I'm probably out of options, but before a factory reset (or the bin!) I'd just like to try and understand what could have happened. At least I could possibly avoid it next time.
Just to add - I've just done a Factory Reset. The problem is still there, apps don't respond, I can't uninstall anything, USB connection doesn't respond (or does respond but keeps dropping out) and after a while it will spontaneously restart. How on earth can one operation do this to a phone?
Click to expand...
Click to collapse
Try to install some app which keep notifying you whenever you get such virus in your handset.
Isaac34 said:
I understand if this is too broad a question, but on the off-chance there is at least a broad category of problems anyone could point me to...
I've had a problem with the phone after asking a third party file managing app to look for duplicate files (usually quite a long operation). It failed to complete, and since then nothing has been working on the phone and it keeps restarting. The weird thing is (or at least weird in my experience). It hasn't frozen or crashed. It's just that everything seems to be finding it hard to do anything. It's exactly the same in safe mode.
I turned on some developer tools (CPU indicator and notification for unresponsive apps). I don't really know what the CPU indicator is showing me (having no point of reference), but it spiked very quickly one time to cover almost the whole screen then calmed down to sit about a quarter along, so I'm presuming CPU usage is far from full. The unresponsive app notification is more telling as every minute or so a new app comes up with "... is not responding. Would you like to close it?". Basically everything is not responding.
I also tried checking running apps and cached processes, the third party app is not still running, just the usual set of background Google apps.
I can't do any USB debugging or software repair because "USB connectivity is not responding". I can't uninstall or re-install anything because "Settings is not responding" and "Google Play is not responding". I can't even use certain developer tools because many of those are "...not responding"
I realise this means I'm probably out of options, but before a factory reset (or the bin!) I'd just like to try and understand what could have happened. At least I could possibly avoid it next time.
Just to add - I've just done a Factory Reset. The problem is still there, apps don't respond, I can't uninstall anything, USB connection doesn't respond (or does respond but keeps dropping out) and after a while it will spontaneously restart. How on earth can one operation do this to a phone?
Click to expand...
Click to collapse
If you have a custom recovery I would suggest you to wipe the system os and install firmware again
You can google search it like
How to install stock firmware on 'your device'
But instead of just solving the problem, I am much more curious in knowing how the problem occurred
Could you please tell me
What was the app's name?
From where did you download the app?
And did you granted root permission to the app?
Hope my post was helpful
Regards,
milkyway3