Develop Bugs

[Q] Phone randomly crashes, trying to root now.

I had the phone for about a month now, i bought it on ebay it stated it was New, i check and it is still locked S-On.
But just randomly it started to crash and reboot. I tried all the basic steps, remove apps but every time it reboots it reloads everything back on it.
I tried both hard reset and factory reset both did not work. I'm noticing that i cant turn off fast boot because once it crashes and reboots, all the setting and apps go back to the way it was. Now I'm trying to root it to see if that would cure the problem and thinking possibly an update got corrupted or something and i know once you root it, it will erase all internal data.
While trying to root it, i got all the way to loading the bootloader and once i selected yes to unlock bootloader, it restarted but nothing happened it went back to the way it was. I've tried to delete/erase my data and cache through windows command but keeps saying it failed. Also now i cant start the bootloader over again.
Any ideas what i can try or do? is there an Hboot loader since I'm not able to turn off the fast boot in the setting?
I'm very new to rooting but catching on quickly.

This doesnt quite seem like a boot loop... Help?

So my phone has been perfect for over a year. Within the first month of owning it I rooted, installed TWRP, and jumped on CM13. Been updating nightlies all year long once every week or so and enjoying the phone. Its really been perfect. Tonight after work I jump in my car, throw it on my car charger, and drive home. When I get home I notice for some reason I have no cell service (Emergency Call Only) so I reboot. That was the end. The reboot got stuck on the CM boot screen flashing the circle out around the CM face over and over and over. So, I pop the battery, try again, same thing.
Well, being that I have rooted and flashed for years now I figured Id wipe dalvik and cache. Tried that, same thing. Did a full wipe and reinstalled the nightly from my SD card. This time I thought I made progress as it set up all the apps. Then it just hangs on "starting apps" and then it sits there forever. Never boots. Doesnt loop or restart or anything, just says its starting apps.
So, jump on here and find the bootloop issue. My serial is 505x so I was wondering if maybe thats my issue. Decide to download the all in one flash zip from here...
http://forum.xda-developers.com/tmobile-g4/development/stock-h811-20i-images-kdz-flashable-t3308227
and I flash that. Stock rom works without any issue. Fired it up, logged in, no problems. Huh. Do a restart and even though I flashed that file it still shows bootloader unlocked as the LG logo comes up, and boots into TWRP as normal as well. Figured well I flashed a stock rom, lets give CM13 a try again. I download a fresh nightly through my pc and transfer it over via usb so I know its good. Full wipe, flash, reboot, hangs at "starting apps" again.
Now I am lost. The stock rom sucks and my love for this phone is based around what it is with CM installed. Am I missing something here? I really want to get back to CyanogenMod and away from the clunky slow stock rom.
Any input is greatly appreciated. Thank you all.
EDIT: Well went through the Android setup steps after flashing the stock rom so I would have a phone until this was all figured out. Turned out its not working. After setup I am not getting "Process System Isn't Reponding: wait or close" No matter what I do the phone is so slow or laggy I cant use it. Its trying to download my apps and restore my phone from my Google account but it just hangs up. No idea what to do at this point. Is my kernel messed up? Its a totally clean flash. What the heck. 3am, I give up, hopefully someone has insight in the morning. Thank you all.

ride1226 said:
So my phone has been perfect for over a year. Within the first month of owning it I rooted, installed TWRP, and jumped on CM13. Been updating nightlies all year long once every week or so and enjoying the phone. Its really been perfect. Tonight after work I jump in my car, throw it on my car charger, and drive home. When I get home I notice for some reason I have no cell service (Emergency Call Only) so I reboot. That was the end. The reboot got stuck on the CM boot screen flashing the circle out around the CM face over and over and over. So, I pop the battery, try again, same thing.
Well, being that I have rooted and flashed for years now I figured Id wipe dalvik and cache. Tried that, same thing. Did a full wipe and reinstalled the nightly from my SD card. This time I thought I made progress as it set up all the apps. Then it just hangs on "starting apps" and then it sits there forever. Never boots. Doesnt loop or restart or anything, just says its starting apps.
So, jump on here and find the bootloop issue. My serial is 505x so I was wondering if maybe thats my issue. Decide to download the all in one flash zip from here...
http://forum.xda-developers.com/tmobile-g4/development/stock-h811-20i-images-kdz-flashable-t3308227
and I flash that. Stock rom works without any issue. Fired it up, logged in, no problems. Huh. Do a restart and even though I flashed that file it still shows bootloader unlocked as the LG logo comes up, and boots into TWRP as normal as well. Figured well I flashed a stock rom, lets give CM13 a try again. I download a fresh nightly through my pc and transfer it over via usb so I know its good. Full wipe, flash, reboot, hangs at "starting apps" again.
Now I am lost. The stock rom sucks and my love for this phone is based around what it is with CM installed. Am I missing something here? I really want to get back to CyanogenMod and away from the clunky slow stock rom.
Any input is greatly appreciated. Thank you all.
EDIT: Well went through the Android setup steps after flashing the stock rom so I would have a phone until this was all figured out. Turned out its not working. After setup I am not getting "Process System Isn't Reponding: wait or close" No matter what I do the phone is so slow or laggy I cant use it. Its trying to download my apps and restore my phone from my Google account but it just hangs up. No idea what to do at this point. Is my kernel messed up? Its a totally clean flash. What the heck. 3am, I give up, hopefully someone has insight in the morning. Thank you all.
Click to expand...
Click to collapse
You really have to investigate by adb. Look into the dmesg output and logcat as well. Maybe your sdcard is corrupt or 100 other issues are possible as well. What device do you own? H811? unlocked?
.

I have rooted my lg g4 h811 and am trying to flash cm 14, after flashing it through twrp, my phone stuck in bootloop. i try o put it in recovery but it only gives me factory reset option which i did several times but still stuck on bootloop. what should i do?

kunate said:
I have rooted my lg g4 h811 and am trying to flash cm 14, after flashing it through twrp, my phone stuck in bootloop. i try o put it in recovery but it only gives me factory reset option which i did several times but still stuck on bootloop. what should i do?
Click to expand...
Click to collapse
There are several users reporting that the latest cm version bootloop the best option is to start in download mode and Flash with LGUP Stock ROM.
You could also try to boot into Download Mode and then flash the latest twrp and then Boot into Factory Reset Mode again

Samsung Galaxy Tab S stuck in bootloop after flashing official ROM and factory reset.

After recovering from a previous bootloop issue with my Tab S, I'm in the same situation after flashing the official Samsung stock ROM for KitKat 4.4.2 via Odin.
When the ROM was first flashed, the tablet began working as per normal with the exception of it taking 10+ minutes to fully reboot and the device somehow restarting itself and loading the display within a second. However, after a few days, I kept receiving pop-up windows on the tablet stating that different applications (most of them I didn't have opened or running in the background at the time) weren't responding. A couple of days after that, more of said pop-up windows kept appearing on the screen, sometimes freezing the whole device until a push notification appeared in the background or the device force-rebooted itself.
I flashed the ROM again once or twice and cleared the cache partition to see if that made any difference, which it unfortunately didn't. I also removed the microSD card and SIM card, force-rebooting the device without them, and then with them when that test failed.
Now, for roughly about a week, the tablet has been stuck in a bootloop (the splash screen animation) where I have left it to drain the battery, leave it for about a day or so, and recharged it to 100%. So far there hasn't been any success.
Today I finally factory reset it to see if that may help, and the only thing that has changed is that the sound of the device rebooting is now playing when it does transition to the loading screen, which I had turned off previously when the tablet was still working.
Is there anything else that I may have missed that could help it work again? It's not rooted (and I would very much prefer to keep it that way) and has not had a custom ROM installed or flashed onto it. It can still enter Download Mode and Recovery Mode, but other than that and being about to use the Power-Volume Down technique, there's not much else I can do with it so far.

AussieMouse said:
After recovering from a previous bootloop issue with my Tab S, I'm in the same situation after flashing the official Samsung stock ROM for KitKat 4.4.2 via Odin.
When the ROM was first flashed, the tablet began working as per normal with the exception of it taking 10+ minutes to fully reboot and the device somehow restarting itself and loading the display within a second. However, after a few days, I kept receiving pop-up windows on the tablet stating that different applications (most of them I didn't have opened or running in the background at the time) weren't responding. A couple of days after that, more of said pop-up windows kept appearing on the screen, sometimes freezing the whole device until a push notification appeared in the background or the device force-rebooted itself.
I flashed the ROM again once or twice and cleared the cache partition to see if that made any difference, which it unfortunately didn't. I also removed the microSD card and SIM card, force-rebooting the device without them, and then with them when that test failed.
Now, for roughly about a week, the tablet has been stuck in a bootloop (the splash screen animation) where I have left it to drain the battery, leave it for about a day or so, and recharged it to 100%. So far there hasn't been any success.
Today I finally factory reset it to see if that may help, and the only thing that has changed is that the sound of the device rebooting is now playing when it does transition to the loading screen, which I had turned off previously when the tablet was still working.
Is there anything else that I may have missed that could help it work again? It's not rooted (and I would very much prefer to keep it that way) and has not had a custom ROM installed or flashed onto it. It can still enter Download Mode and Recovery Mode, but other than that and being about to use the Power-Volume Down technique, there's not much else I can do with it so far.
Click to expand...
Click to collapse
Factory reset, install stock firmware, wait ten minutes and you should be good.
But why kitkat? MM is available and working well.

ashyx said:
Factory reset, install stock firmware, wait ten minutes and you should be good.
But why kitkat? MM is available and working well.
Click to expand...
Click to collapse
It worked! Thank you so very much!
And I'm not a huge fan of updating my Android devices due to past experiences, but if this happens again, I might just update it to Marshmallow.

ashyx said:
Factory reset, install stock firmware, wait ten minutes and you should be good.
But why kitkat? MM is available and working well.
Click to expand...
Click to collapse
@ashyx
i love you man...this worked for me too...thank you...now i need to reinstall TWRP again and see what's cooking......

I had this problem recently too, with the added complexity that the "Factory Reset" option in recovery wasn't working -- it would say something like "MDM does not allow factory reset" and then just reboot.
Fixed it by directly flashing TWRP with heimdall, then booting into the new TWRP recovery, performing a factory reset, and then rebooting the OS. This time it got pass the bootloop.

i flashed new twrp for T700 it's bootloop cannot enter the twrp menu keep bootlooping ...what's the solution for this?please help

Help ME!
What are "stock firmware" and "MM"? and where to get it?

I've replaced the power button thinking it was a hardware issue but now I'm not sure. I've also installed a few different stock roms but still have the same problem. Does anyone have any insight as to what could be going wrong and what I can try to get it fixed? Thanks for any help you can give. The device is a Samsung SM T-800

Galaxy Tab Pro 10.1 SM-T520 Stuck in Kind of a Bootloop of Sorts

So I feel like this is different from a typical bootloop (certainly different from ones I've had in the past). Any ideas short of factory reset would be very much appreciated. I just need it to load once more to do a Titanium Backup (and I guess I should install TWRP and do a nandroid backup)!
I've been using my Tab Pro for years now, rooted, works perfectly, and I always leave it on. I thought yesterday, perhaps this is a bad idea, I should turn it off every once in a while. But I wanted to play a game before I did. I click the game icon and then everything froze and it restarted itself.
It gets stuck at the SAMSUNG logo page. Sounds like a typical bootloop. After 20 minutes of waiting, nothing changes, so I hold down the power button and it restarts and actually loads to my home screen! Great! I swipe the screen lock, click on my game -- it restarts, rinse, repeat. Each time it restarts itself it stops at the SAMSUNG page, forcing a second manual reboot that fully loads, but doesn't go 10 seconds before restarting. I try to load different things each time and finally give up.
So I look some stuff up online. There's a suggestion to go into recovery (I could've sworn I had custom, but apparently not?) and "Wipe Cache/Partition." I look up that this is safe and do it (Sidenote: Power+Home+Vol Up only works around every 5th try or so. It glitches out every other time, there's a quick flash and a horizontal line and it restarts again). Now I restart and it worked! It loads and no reboot!
But now, a third of my apps/games have the android guy as an icon and even more of the real icons are all grayed out. I figure one more restart and it would come back. Now I'm back into my weird bootloop. I try wiping cache/partition again and again and it no longer works as a solution...
TL;DR - Tablet keeps restarting to SAMSUNG logo, requires 2nd manual restart. Home screen loads, but then restarts 10 seconds later. Clearing cache/partition made things worse. HALP!
EDIT: My current build is KOT49H.T520XXUANAE. I can't even find the stock ROM for this! Does it exist?
EDIT 2: After letting it charge for an hour (it was already 93%) I went back to it and it had loaded! But the home screen was blank save for the Google search and the Apps icon (which found no apps....). I was able to get into settings and attempted to click Application Manager and then it froze again.

Update: Still in need of help if anyone has any. A wonderful person on the forums linked me to my stock ROM, I pushed that through ODIN, it worked and did the "Android is Updating App XX of 200" thing.
It loaded and didn't crash! Most of the icons came back, but were still grayed out (I have a second partition via Link2SD which, when not rooted, doesn't load!)
So I went to Settings to see if USB debugging was enabled... and it froze. Kind of. It let me bring up the task bar and close settings, but not reload anything. Eventually I was forced to restart because I couldn't do anything. I tried booting into safe mode and still nothing.
Now when it loads, I get repeated "Unfortunately, Samsung keyboard has stopped working." and then the touch screen stops functioning and it restarts. I'm having a great day.

hamstrman said:
Update: Still in need of help if anyone has any. A wonderful person on the forums linked me to my stock ROM, I pushed that through ODIN, it worked and did the "Android is Updating App XX of 200" thing.
It loaded and didn't crash! Most of the icons came back, but were still grayed out (I have a second partition via Link2SD which, when not rooted, doesn't load!)
So I went to Settings to see if USB debugging was enabled... and it froze. Kind of. It let me bring up the task bar and close settings, but not reload anything. Eventually I was forced to restart because I couldn't do anything. I tried booting into safe mode and still nothing.
Now when it loads, I get repeated "Unfortunately, Samsung keyboard has stopped working." and then the touch screen stops functioning and it restarts. I'm having a great day.
Click to expand...
Click to collapse
Few of this probs I did have too.
I would recommend to start from scratch and wipe also your data and sd-card (with TWRP). Install either stock or Custom, but put out your sdcard before re-booting.
Just play around and after that (with no probs hopefully) insert it again.

starbright_ said:
Few of this probs I did have too.
I would recommend to start from scratch and wipe also your data and sd-card (with TWRP). Install either stock or Custom, but put out your sdcard before re-booting.
Just play around and after that (with no probs hopefully) insert it again.
Click to expand...
Click to collapse
I appreciate the response, but as I said, I'm looking for anything shy of factory reset. If I lose all of my apps and data and configuration, I might as well throw out the tablet and buy a new one.
Still trying to figure out the pattern. I got another attempt of it not restarting for 10 full minutes. The keyboard failing is annoying because it doesn't stop, but I can live with it if it means being able to backup my tablet with Titanium Backup. I only got 6 apps backed up before it froze, but I'll get through all of them eventually (I hope). It's just going to be incredibly frustrating.

Stuck at "Android is Starting..." after entering TWRP

I just got the phone, so I have nothing installed and nothing to loss at this time, luckily.
I have unlocked and installed Codeworkx TWRP and Magisk for root.
The phone was fine, I configured some settings then rebooted to TWRP and made a backup, before installing anything.
This is when I encountered the issue:
Upon rebooting the phone is stuck at "Android is Starting..."
Now I can unlock (pin or fingerprint) and access settings, but only settings as I have no launcher.
I tried rebooting and wiping the cache and Dalvik without any change
Since I'd restarted more than once without issues I can only assume the cause was performing a backup via TWRP.
Now as stated I have nothing installed I can wipe anything and begin again, but if this happened in a normal situation, I'd be in real trouble. Any Ideas why this happened?, as it seems very odd that I can access the phone and setting, but can not get a launcher to start.
More over any suggestions on how to fix it short of reinstalling?
I'm very worried as this would make the phone unusable if it happened in a normal situation.
ERIC

Your installation or use of TWRP probably has nothing to do with it.