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After 4.3 update, phone reboots whenever i log in

The phone received the OTA update this afternoon. After it was updated, every time I try to swipe in at the lock screen, the phone reboots. Based on the lock screen, I can see the phone works just fine. There's notifications, I can scroll to the lock screen widgets and I can even answer phone calls.
The phone was stock/rooted prior to the update. What to do?

Same. Update seems to have finished, bootloops after inputting user password to unlock screen. It's a short boot right back to the password screen again.
Was stock, rooted, unlocked, 4.3 was OTA update

sucinimad said:
The phone received the OTA update this afternoon. After it was updated, every time I try to swipe in at the lock screen, the phone reboots. Based on the lock screen, I can see the phone works just fine. There's notifications, I can scroll to the lock screen widgets and I can even answer phone calls.
The phone was stock/rooted prior to the update. What to do?
Click to expand...
Click to collapse
I was having miscellaneous issues after the 4.3 update as well. I'm starting to think that some of these people who insist on un-rooting your phone prior to system updates might have made a good point. I don't use a lock screen, but I couldn't uninstall any applications or the phone would reboot. Even trying to modify some of the settings would force reboot as well.
I ended up giving up on it and wiping it / flashing 4.3 stock. If anyone is reading this and hasn't updated to 4.3 yet, I would suggest unrooting your phone, but keeping an unlocked bootloader before updating (the update will break root anyway... and OTA Rootkeeper doesn't work). To get root back use TWRP to load SuperSU and you should be back in business.

deusfaux said:
Same. Update seems to have finished, bootloops after inputting user password to unlock screen. It's a short boot right back to the password screen again.
Was stock, rooted, unlocked, 4.3 was OTA update
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Click to collapse
I got really lucky somehow, in getting the phone to work and managing to keep my data.
I don't remember every step in order, as I'm sure lots of them didn't do anything, but eventually I just reflashed every part of the factory images EXCEPT userdata.img as I (correctly?) figured that would erase my ****.
Wiped cache a few times from recovery as well.
Had a couple scares - at one point the LED turned RED during a couple bootup attempts.
First time after the 3rd round of flashing (including system.img) it would not boost past the X. Had to wipe cache in recovery again.

deusfaux said:
I got really lucky somehow, in getting the phone to work and managing to keep my data.
I don't remember every step in order, as I'm sure lots of them didn't do anything, but eventually I just reflashed every part of the factory images EXCEPT userdata.img as I (correctly?) figured that would erase my ****.
Wiped cache a few times from recovery as well.
Had a couple scares - at one point the LED turned RED during a couple bootup attempts.
First time after the 3rd round of flashing (including system.img) it would not boost past the X. Had to wipe cache in recovery again.
Click to expand...
Click to collapse
In the end, I went through almost the exact experience (including red LED). Running on stock 4.3 image now. Thanks.

my phone is reboot today.
there might be problem with rooted stock kernel?
there are someone has same problem?

Acuity said:
I was having miscellaneous issues after the 4.3 update as well. I'm starting to think that some of these people who insist on un-rooting your phone prior to system updates might have made a good point. I don't use a lock screen, but I couldn't uninstall any applications or the phone would reboot. Even trying to modify some of the settings would force reboot as well.
I ended up giving up on it and wiping it / flashing 4.3 stock. If anyone is reading this and hasn't updated to 4.3 yet, I would suggest unrooting your phone, but keeping an unlocked bootloader before updating (the update will break root anyway... and OTA Rootkeeper doesn't work). To get root back use TWRP to load SuperSU and you should be back in business.
Click to expand...
Click to collapse
i got the same issue, look here: http://forum.xda-developers.com/showthread.php?t=2380546

[SOLVED] Suddenly G2 boots only into recovery mode (loop)

Sometime last night, my AT&T G2 (D800) decided to go from being powered on and idling, to going into TWRP recovery mode. All by itself. I saw this, unplugged it from USB, and tried to reboot into system mode. But it simply won't do anything except boot into recovery. Powering off, trying to get to the bootloader, none of that works.
This is not a custom ROM, it's 4.2.2 stock from LG. I only rooted the phone, which was several weeks ago, and haven't had any problems, aside from TWRP not wanting to back up anything. I've been using Android since the original TMO G1 with JesusFreke's ROM, so I have a pretty good idea of what I'm doing, hopefully.
The only recent changes I've made are:
I updated busybox about 3 days ago (but have rebooted fine since)
I grabbed several legit apps from the market last night
Last night I also DL'ed, but did not apply, a ~50MB OTA update that has been pending. I don't think that would install without explicit permission anyway, which I didn't give it?
This phone was encrypted from the start. Maybe that;'s what prevents TWRP backups,, but right now I'm seeing TWRP errors/logs saying something like "Unable to mount \data". And yet I can browse to other folders, and see filenames in \etc for example. However, I don't see any files at all in \boot.
Since this phone has no external memory, and it's customized and has numerous configured apps, I really really don't want to have to wipe it. Although at this point, that may not even fix the problem? Even if it did, since I haven't been able to make backup images, it would be a Bad Thing™ either way. (Yes, I do have a secondary plan with Titanium, with backups going to cloud storage, but these are tedious and now a few weeks old. And wouldn't restore the ROM & system en masse.)
Please help.

Solved?
I'm not sure what caused this to occur, but I found somewhat of a solution after digging deep into my Google-fu.
I followed the instructions in this XDA thread and it actually worked. I didn't have adb access, but I was able to use dd successfully. It allowed me to boot into the device, unencrypt it, then arrive at the lock screen.
However, when I put in the lock code, it went apesh!t and played multiple notification sounds, with a blue circular wait symbol. It also flashed the LED from green to blue, as it normally only does during boot. Once I pressed the power button, I was back back into TWRP.
So then I followed Step 2 again, and once in the phone, I used terminal to run the dd command from inside the OS. This might be what it ultimately needs, because the prior attempt in TWRP had an error to the effect of "no space left on device".
I can't call it Solved yet, but it looks good to at least be able to get in and use the phone. I'm backing up with Titanium before I do anything else and will reboot and test its permanency later.

I'm gonna close this thread now that I think I have a handle on what is going on. The fix does survive a reboot, so I believe it's possible to repair the issue permanently per the instructions above. I also ran the phone for 3 hours with heavy app usage and no problems.
I believe what may have happened is my OTA decided to override my choice to NOT update the ROM, as some have reported in this Reddit thread. There's a lot of good info in that one, including how to stop getting nagged by turning the OTA notifications off, or to freeze it entirely with Titanium Backup if rooted.
Anyway, what apparently happens is that when the OTA/upgrade goes to reboot, and encounters a custom recovery, it gets confused... when you try to power cycle or reboot again, it sees the stock recovery still hasn't run whatever it wanted, so it starts recovery again Lather, rinse, repeat.
Fun times.

When WiFi is turned off I get 'Unfortunately System UI has stopped'

This is on two standard Galaxy S5's, with standard ROM, etc - not rooted, or anything else.
Every time I turn off WiFi, or enable Mobile Hotspot, I get 'Unfortunately System UI has stopped'.
To fix I have to Power off/on the phone.
(Turning on WiFi is no problem, just turning it off.)
I have gone into 'Safe Mode', and same issue, so it looks to not be a bad App.
I have also uninstalled 'Google' updates, and again no change...
Any thoughts?

All of a sudden my S5 showed the exact same error message for no aparent reason... I didn't do anything, and now I can't use my phone at all because of that bug. It happens on every boot so I can't even unlock my phone. Tried reinstalling everything, ROM, recovery, kernel, with/without root = still same, what just happened here??
EDIT: Same thing if I'm in Safe Mode -_-

Seeing noone knows a solution here's what I did yesterday.
1. Backed up all my stuff from internal storage to the sd card
2. Did factory reset in TWRP recovery
3. Flashed completely stock official firmware from Samsung
4. Waited for it to boot up and try to restore some of my settings (it restored all folders on their places, made same amount of home screens as I had before the reinstall and downloaded all of my previously installed apps from the Play Store, ofcourse without the cracked ones, and it also restored most apps' data as well so it's not as bad as you may think to factory reset and reinstall everything)
5. Started rooting, flashing TWRP again, installing Dolby Audio, Xposed and everything I had before, took me one full day to set it up as it was before.
Now when I set it up I always make a nandroid backup from when things are working fine, in case it goes crazy for no reason again... Good luck!

when the wifi radio is acting weird, a dirty flash of your current ROM susually fixes is as its probably a radio issue. Id do that before doing anything drastic like the boot-n-nuke Odin flash and starting from scratch (which will fix that issue)

I don't think I have a ROM issue, as I have two S5's, and both have the same issue... and both are standard ROMs.
I will do a factory re-set on one at some point, but this looks to be a 'simpler' issue.
I have tried a full Cache delete, as well as other 'clean' processes.
Nothing works.

I tried to re-flash my stock ROM as @youdoofus said but still had that annoying popup. Try everything you can think of, if all else fails, reset.

koragg97 said:
I tried to re-flash my stock ROM as @youdoofus said but still had that annoying popup. Try everything you can think of, if all else fails, reset.
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Click to collapse
well, you can wipe cache, and dalvik 3x each (not kidding about the 3x each), then dirty flash the rom, pray to the gods of android, reboot. If failure occurs, its Odin Nuke time unless you want to try to flash an individual radio file by itself (not recommended)

Tried to downgrade from O DP4 to Nougat, failed.

I tried to downgrade from O DP4 back to Nougat N2G48C by fastboot flashing bootloader, boot, radio, system and vendor... But when it comes back up in Nougat it starts up, crashes com.android.phone and then goes back to the circling Android screen. I tried reflashing DP4... It half works, meaning I can get to the launcher but the phone won't connect and says mobile data is turned off. Turning it on, just leads to nothing. There's some other odd things like the notifications swipe down screen is half working and the square 'running apps' menu button is totally non-functional. I suspect it's some system updates downloaded from the play store that are conflicting. Any thoughts? I will probably end up backing up my app data in Titanium and factory wiping and restoring one by one but I'm willing to try out some other things before that.

I did the same thing coming from O DP4 to august security patch on Nougat. I am pretty sure you should backup all the stuff you need and just flash whole factory image including userdata. I always do this when migrating versions and I have no problems. I also didnt have any problems with "sensors not working" as a lot of users reported.

Well I just ran the flash-all.sh which includes wiping userdata and it seems to be better now...

Frustrated after installing O and downgrading to N.. things aren't the same

TL;DR O was janky after dirty flash so downgraded but now N isn't right even after super wiping everything and reflashing stock N image.
Ok so I have no idea why I decided to try out O with all the dumb bugs that are being reported and the lack of a simple night light enabler but I did anyway. Phone was working great on 7.1.2, had the night light and blue pixel accents, the round icons actually just showed up for me which I like better than all the craziness of 5 different shaped icons cluttering up everything.
I dirty flashed stable O and it was janky as hell so after a few hours I decided to downgrade using my nandroid backup I just made. All seemed fine until I got in my car and noticed Bluetooth share was broken which kept causing force closes. I tried everything to fix it but nothing worked, had to end up reflashing latest N image. From that point all went downhill.
Phone will not show all the round icons anymore no matter what (play store being one that I totally despise being that huge play button, music, games, photos, movies, maps, etc but phone, messages, camera contacts and a few other are working), assistant would not enable and only screen search was there, Google drive backup isn't working either even with turning it off and on but it just says it's disabled by the administrator (??), I even went in to twrp and wiped EVERYTHING 3 times under the advanced menu and chose to repair the system and then fully ADB flashed the stock N image again.
After that, I rooted with magisk but now BusyBox won't install as systemless to the su/bin folder, I flashed both the night light only and the full pixel mod from gerard hoping it would enable the round icons on the GNL but it didn't. I tried flashfire to flash the N system again to clean that up but it just turned the phone off every attempt. I finally got it to work by reinstalling magisk but it didn't actually flash the system even though it went through the motions and said it was successful. I had to do it again for it to work but everything just seems weird now. What the F am I doing wrong? I know it's not a pixel thing for the round icons bc my wife's Moto z force just got 7.1 this weekend and the round icons showed up for her with no mods, no root, and she has GNL like me.
Help?

Try downloading a custom ROM like Nitrogen or Aquarius. Both of those have the options you want without having to flash any other mods. As for Google Assistant I've only had luck using Beans Gapps full package or open Gapps stock package. I personally prefer Beans. Do a full wipe before you flash and you should be good.

First of all, you went from N to O with a dirty Flash.... Of course there will be bugs. If you want to go back to N, Flash N image(boot, vendor, radio, system), when it boots up, go to settings and then perform a factory reset. After that, you can restore your Nandroid backup.

Thanks All,
Yes I do understand the issues with going from N to O on a dirty flash which is why it was janky and I decided to roll back. As mentioned, I used TWRP to wipe everything 3 times and then reflashed the latest stock N image. Google assistant worked after doing that and the interesting thing I found was if I disabled or deleted apps from the phone and then redownloaded or reenabled them, the round icons began showing again (i.e. google play, docs, sheets, etc) so that issue is resolved. I did not use the nandroid backup I made, I basically just started over from scratch and even though the Google Drive backup is still showing "disabled by your administrator", I see a new backup that was made this morning at 6:13am. I also installed busybox through magisk now rather than the separate app so I guess the only thing left outstanding is why the phone still says the Drive backup is disabled by an admin.

I would grab Nexus Root Toolkit, I install to C:\NRT, download the full August Nougat image, save it to C:\NRT too, then do a complete stock restore, this will wipe everything off phone.
Put you back to starting line and then race with flashing and mods.

ossito2012 said:
I would grab Nexus Root Toolkit, I install to C:\NRT, download the full August Nougat image, save it to C:\NRT too, then do a complete stock restore, this will wipe everything off phone.
Put you back to starting line and then race with flashing and mods.
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Click to collapse
I did use wug's toolkit to flash over ADB. I wonder if the image might have been slightly messed up even though the SHA-256 matched. I could always try to redownload the image again. I was going to wait until 8.0.1 was released to try O again but when I did have O, the backup options were stuck on "waiting for backup" (the menus are slightly different in O) and it never seemed to move forward. I researched that and I guess it's a known issue with some phones and a fix is supposed to be coming out this month but at this point, who knows.

jrg67 said:
I did use wug's toolkit to flash over ADB. I wonder if the image might have been slightly messed up even though the SHA-256 matched. I could always try to redownload the image again. I was going to wait until 8.0.1 was released to try O again but when I did have O, the backup options were stuck on "waiting for backup" (the menus are slightly different in O) and it never seemed to move forward. I researched that and I guess it's a known issue with some phones and a fix is supposed to be coming out this month but at this point, who knows.
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Click to collapse
Toolkit? FFS- fully wipe your device and install full 8.0 image. Done. That is what a full image is for --> janky.

v12xke said:
Toolkit? FFS- fully wipe your device and install full 8.0 image. Done. That is what a full image is for --> janky.
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Click to collapse
I don't think you are fully understanding what the situation is. I have said now 2 or 3 times, I have completely wiped the phone 3 times in a row using twrps advanced settings and I flashed the latest stock N image. The only reason I used wugs toolkit was so I didn't have to ype out all the commands to flash. After the flash was done, I manually flashed twrp again and re-rooting using magisk. Anyway, things are mostly back to normal now. I will manually flash O again at a later time.

jrg67 said:
I don't think you are fully understanding what the situation is. I have said now 2 or 3 times, I have completely wiped the phone 3 times in a row using twrps advanced settings and I flashed the latest stock N image. The only reason I used wugs toolkit was so I didn't have to ype out all the commands to flash. After the flash was done, I manually flashed twrp again and re-rooting using magisk. Anyway, things are mostly back to normal now. I will manually flash O again at a later time.
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Click to collapse
Still wrong. Nuclear flash everything even wiping the whole twrp since its a huge leap from N under the hood. Never dirty flash and of course clean flashing still won't be enough. Do a nuclear flash, wipe everything including your storage and recovery, back it up. Don't be lazy then be frustrated at a plethora of bugs if you didn't even flash properly.

phantom146 said:
Still wrong. Nuclear flash everything even wiping the whole twrp since its a huge leap from N under the hood. Never dirty flash and of course clean flashing still won't be enough. Do a nuclear flash, wipe everything including your storage and recovery, back it up. Don't be lazy then be frustrated at a plethora of bugs if you didn't even flash properly.
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Click to collapse
To be clear, what do you mean by "nuclear flash" bc I'm pretty sure that is exactly what I did, 3 times. Wiped dalvik/art, system, data, userdata, cache from twrp. As for wiping the recovery, that gets done during the flash of the image. So I ask again, what did I miss? Also, it's been said many times that dirty flashing can cause issues, I get it. I wasn't being lazy with trying to get back to N which is the whole point of this thread.