Develop Bugs

(A Type of) Random Reboot Problem Solved?

Short version:
Use CWM or TWRP to (1) format sdcard, (2) erase dalvik cache, (3) erase cache and (4) factory reset. This seems to resolve at least one source of random reboots. If installing a new ROM, do that first and then followed by the four steps, then boot into the new ROM. Step (1) may be the important one (in which case it might, in principle, be possible to solve the problem while saving userdata), but I don't know.
UPDATE: It was working fine and I had to spoil it all by installing MIUI, just for kicks. Now, the old problem is back and the solution above doesn't seem to work. Looks like this is not a completely reliable solution...
* * * * *
Long version:
My wife's GNex was in a very bad way. It is entirely stable in Android 4.0.2. But if either upgraded or flashed to anything else, will randomly reboot. Actually, it's not even that random--it will reboot on its own within a couple of minutes of idle with the screen off. I tried all sorts of things--flashed different ROMs, radios, etc.--factory reset multiple times. Googling turns up lots of chatter about random reboots but little by way of viable solution. I figured that the problem may be hardware related. But all Samsung's servicing did for me is to return the unit to 4.0.2. At that time, 4.0.4 was just released and the local servicing centre hadn't even received their copy of the ROM (for yakjuwx). In the end, I 'solved' the problem by rooting and disabling the OTA update notification. (My wife wasn't bothered by the fact that she wasn't running the latest Android version. And the phone works fine in 4.0.2 otherwise.) Work and life caught up and I didn't think much of the matter after that.
That was about a year ago.
Recently, I migrated my wife to a brand new GNex, and took the opportunity to try my hand at solving the problem again. I flashed the latest 4.3 ROM, the latest stable CM10.1, Paranoidandroid, etc. But no matter what I tried, somehow, the phone is stable only with Android 4.0.2 (ICL53F). A chance find online mentioned something about data corruption on the sdcard as a source of problem, and that the usual factory reset doesn't actually reformat the sdcard (it only marks it as empty). Putting 1 and 1 together, I used CWM to do the things listed above (see "short version") and now, the phone is running stock 4.3 (JWR66V), stable CM10.1 and Paranoidandroid without random reboots so far. So now, I am a happy camper, though with one extra, fully functional white GNex.
Footnote: If you don't understand what I said in the short version, it's best you don't try doing anything yourself without first reading up on fastboot commands. This is one place to start. I am not responsible for anyone bricking their device fooling around.
Thanks for reading.

Update to my adventure.
Just about resigned to the fact that the phone is back to its old ways. The old tricks no longer work. What happened next?
1. Left off for more than a day (I gave up).
2. Installed AOSPA PARANOIDANDROID 3.96--using CWM, installed ROM, GApps, wipe dalvik, wipe cache, format sdcard.
Weirdly, the phone now seems fine. It hasn't rebooted by itself after 30+min in sleep. The old problem was that it will invariably reboot by itself in within 2 minutes from screen off so even if there are other problems, the old one is not there anyway.
Something in the steps above seems to have made a difference.
Still monitoring.

T800: Can't complete boot when using 7.x.x roms

I had the latest 6.0.1 samsung rom (CPK2) which was giving me problems with freezing. So I am trying to upgrade to an 7.x.x rom, either RR, AIPC, or Lineage. But none of these roms allow the T800 boot to get beyond the initial splash logo screen. I am using latest TWRP, 3.1.1 to wipe and install rom. I am not getting any install errors. Boot loader is confirmed as CPK2.
FYI, I am able to get back to the samsung rom by reflashing it with Odin.
Update 1: In the final attempt of upgrading I installed the official 6.0.1 fw which boots fine unlike the aforementioned alternatives (very strange). However, lock ups and now screen blanking more frequent. This time wiped everything including storage. It looks more like a hardware issue but I wonder if this could be malware even after wiping everything. I will have to take this in for repair but have little hope of solving this problem.

mach281 said:
I had the latest 6.0.1 samsung rom (CPK2) which was giving me problems with freezing. So I am trying to upgrade to an 7.x.x rom, either RR, AIPC, or Lineage.
Update 1: In the final attempt of upgrading I installed the official 6.0.1 fw which boots fine unlike the aforementioned alternatives (very strange). However, lock ups and now screen blanking more frequent. This time wiped everything including storage. It looks more like a hardware issue but I wonder if this could be malware even after wiping everything. I will have to take this in for repair but have little hope of solving this problem.
Click to expand...
Click to collapse
My wife has the US Cellular 10.5 variant (T807R4). It was freezing so frequently it had become almost unusable for anything but watching videos. Rooting and disabling most of the Samsung apps did not fix the problem. I wiped the system with TWRP only to discover that none of the custom ROMs would work on this model. I downloaded and flashed the stock Samsung MM firmware (and it sat on the opening splash screen for at least 15 minutes before it finally booted up) and for the hour I used it after setting it up, I had no problems. I had previously cleared the cache with Titanium Backup and that also seemed to be a temporary fix. My conclusion is that something is happening when the cache fills up that causes the freezes but I'll need more data to say that for sure.

Just an update: I was going to have the hardware looked at so I wiped everything including the storage. But when I took it to the shop and was asked to demonstrate the freezing the tablet wouldn't. So I took it back and it was running OK until a couple weeks later when the same problems reared there heads.
Somehow I managed to get a 7.1.2 installed and the T800 is running great...so far. I'll post back if the freezing starts again.

mach281 said:
Just an update: I was going to have the hardware looked at so I wiped everything including the storage. But when I took it to the shop and was asked to demonstrate the freezing the tablet wouldn't. So I took it back and it was running OK until a couple weeks later when the same problems reared there heads.
Somehow I managed to get a 7.1.2 installed and the T800 is running great...so far. I'll post back if the freezing starts again.
Click to expand...
Click to collapse
Please explain the steps to install 7.1.2 (and which ROM you used) and update on the freezing issue. Most of the freezing issues I have read about seem to be on LTE variants (SM-T807x) so I was about to buy a wifi only (T800) tablet, thinking that would be a solution to the problem. If that's not the case, then I shouldn't waste my money.

The instructions for installing a non-stock ROM are on the dev's host page in Tab s forums. I first tried Resurrection Remix and now am on LineageOS. It was only after I wiped the internal storage area that I was able to get past the 7.x.x boot screens.
I found the stock rom 6.0.1 freezing issue persistent. I believe the problems started for me with XAR H4 and really picked up with K2 (roms supplied by sammobile). The tablet would frequently just freeze while working in an app: the screen and hardware buttons would not respond at all. Never had that problem with Android 5. The only thing I was able to do to unfreeze it was to reboot into download mode then restart the OS from there. I sometimes found that if I left it frozen overnight it would unfreeze itself by morning.

Most stable Rom for LG g-pad 7.0 v410?

Hi, I have the latest CM12 installed in my tablet, but I have a lot of issues, especially when installing multiple apps or if I try to change the Launcher. It gets into boot loop and there is nothing one can do but re-flash the rom, which is pretty annoying. It has happened to me already 3 times in a short while and I am thinking of flashing LineageOS. However, I hear it is still very buggy, especially the issues with wifi. So I would like to ask which is the least buggy Rom for 7.0 v410 or if there is a way to avoid CM12 from getting the problem with boot loop.
Boot loop has been caused when trying to change Launcher (because trebuchet regularly crashes), when installing x-plore file manager and in a clean flash when I attempted to install multiple apps at the same time. In all cases it got stack in boot loop, or would start only to restart after a while, endlessly.

Finally, I opted for LineageOS 14.1.
I had the 11-11 Nightly for some time and seemed fine. Today I updated to 25-11 Nightly. It feels maybe slightly laggy, but still checking it.
I have also installed "Best WiFi Keeper" app from play store and it generally keeps me connected. However, if connection is lost (e.g at restart or if I get out of range), I have to reconnect manually. I tried few apps for reconnecting but nothing worked. It appears that although the WiFi network is seen, the tablet cannot really re-establish the connection automatically.

I found Nothing stable yet.. In last few days, I have installed CM 12.1, same trouble.. I installed Tipsy and Tesle, unable to install apps from playstore. Tried CM 13 and Lineage OS latest build as you, Wifi Teathering and USB teathering not working and same problem with wifi connectivity. Keed posted if you find something better.. I shall too...

Tesla works great for me. I'm running a lollipop version that's still on androidfilehost; I'm not sure if GZR ever got updated beyond 5.1 for V410.
I've had CM 14.1 (long enough ago it was still CM and not LOS) on the tablet, and it felt like it would get laggy. That could just be from junk my kid installs though, but I don't seem to have that problem with Tesla.

I installed Tesla (Tesla-v410-5.1.1.High_Voltage.2.2.1-Release-20150902.zip from https://androidfilehost.com/?fid=24052804347807214) with open G apps but getting errors while installing apps from Play store(Some error code 963 - tried cleaning cache of playstore, play services download manager, removing google account and adding again - Nothing works). Same situation with tipsy. Any help?

kingzones said:
I installed Tesla (Tesla-v410-5.1.1.High_Voltage.2.2.1-Release-20150902.zip from https://androidfilehost.com/?fid=24052804347807214) with open G apps but getting errors while installing apps from Play store(Some error code 963 - tried cleaning cache of playstore, play services download manager, removing google account and adding again - Nothing works). Same situation with tipsy. Any help?
Click to expand...
Click to collapse
That is probably what I'm running, I don't have my tablet right now. I think I flashed it with opengapps nano. I didn't have to do anything unusual to get play store to work.
Tipsy uses the same base as Tesla and Validus. Since it is persisting across multiple flashes and roms, consider formatting the internal storage if it isn't too much hassle, the TWRP wipe where you have to type "yes" to confirm. Sometimes some remnants in userdata that aren't touched by the normal system/data/cache/dalvik wipe cause problems like this and can persist the way you're describing.
Just make sure you have rom and gapps on an external SD or you have confirmed you can push files to the tablet in TWRP over usb via mtp or adb before you blank the internal storage.

jason2678 said:
That is probably what I'm running, I don't have my tablet right now. I think I flashed it with opengapps nano. I didn't have to do anything unusual to get play store to work.
Tipsy uses the same base as Tesla and Validus. Since it is persisting across multiple flashes and roms, consider formatting the internal storage if it isn't too much hassle, the TWRP wipe where you have to type "yes" to confirm. Sometimes some remnants in userdata that aren't touched by the normal system/data/cache/dalvik wipe cause problems like this and can persist the way you're describing.
Just make sure you have rom and gapps on an external SD or you have confirmed you can push files to the tablet in TWRP over usb via mtp or adb before you blank the internal storage.
Click to expand...
Click to collapse
can you tell me if hotspot and usb tethering is working on tipsy? Thanks.

xdause said:
can you tell me if hotspot and usb tethering is working on tipsy? Thanks.
Click to expand...
Click to collapse
I'm on Tesla, but it has the same base as Tipsy. I don't have data on the tablet so it isn't a 100% conclusive test, but it doesn't seem to work. The switch for USB tethering never turns on. Wifi turns on but never connects properly. My laptop does briefly show connection then disconnects with both USB and wifi tethering. It could be because there is no data connection on my tablet, but looking through dmesg on the laptop gives me the impression that something on the tablet isn't working right.

kingzones said:
I found Nothing stable yet.. In last few days, I have installed CM 12.1, same trouble.. I installed Tipsy and Tesle, unable to install apps from playstore. Tried CM 13 and Lineage OS latest build as you, Wifi Teathering and USB teathering not working and same problem with wifi connectivity. Keed posted if you find something better.. I shall too...
Click to expand...
Click to collapse
I'm on lineageOs 14.1 which is alright though the wifi issue is still there. However, someone may have found a solution, but I don't know how to implement it. Check posts 207, 210 and 215 in this thread: https://forum.xda-developers.com/g-...eageos-14-1-v400-lg-g-pad-7-0-t3583952/page22

nicospanas said:
I'm on lineageOs 14.1 which is alright though the wifi issue is still there. However, someone may have found a solution, but I don't know how to implement it. Check posts 207, 210 and 215 in this thread: https://forum.xda-developers.com/g-...eageos-14-1-v400-lg-g-pad-7-0-t3583952/page22
Click to expand...
Click to collapse
Would you (or anyone who sees this) please tell me is it possible to flash TWRP if I'm on 5.0.2? Or must I downgrade first?
I'm rooted already. TBH stock is pretty solid and if the custom roms have too many bugs I might pass. But I would like to flash Viper4Android and don't think I've ever installed it without a custom recovery. Many thanks in advance.

KLit75 said:
Would you (or anyone who sees this) please tell me is it possible to flash TWRP if I'm on 5.0.2? Or must I downgrade first?
I'm rooted already. TBH stock is pretty solid and if the custom roms have too many bugs I might pass. But I would like to flash Viper4Android and don't think I've ever installed it without a custom recovery. Many thanks in advance.
Click to expand...
Click to collapse
I made the same question more or less, over a year ago here: https://forum.xda-developers.com/android/development/help-installing-cm-t3483074
You cannot flash another rom over lollipop and I've never seen twrp for android 5.0.2 for v410. I am not 100% sure because my question was a bit different, but I assume from the replies, that probably not.

nicospanas said:
I made the same question more or less, over a year ago here: https://forum.xda-developers.com/android/development/help-installing-cm-t3483074
You cannot flash another rom over lollipop and I've never seen twrp for android 5.0.2 for v410. I am not 100% sure because my question was a bit different, but I assume from the replies, that probably not.
Click to expand...
Click to collapse
Thanks. That's more or less what I thought. From what I'm hearing there are some bugs in the roms that no doubt aren't being maintained at this late stage so I think I'll stick with stock (would be nice to have a custom recovery though.)
Not that it matters (a year later) but lots of people root with Kingroot when there isn't another option and there's several ways to remove all the bits left behind and switch it to supersu.
Thanks again!

Well, I have a work around to stop wifi from disconnecting in lineage os. After that I did not know when wifi got disconnected and reconnected.
Just download E-Robot from playstore.
https://play.google.com/store/apps/details?id=com.bartat.android.robot
And set it to settings as per screen shot.

kingzones said:
Well, I have a work around to stop wifi from disconnecting in lineage os. After that I did not know when wifi got disconnected and reconnected.
Just download E-Robot from playstore.
https://play.google.com/store/apps/details?id=com.bartat.android.robot
And set it to settings as per screen shot.
Click to expand...
Click to collapse
It works! Thank you so much! It seems the LOS developers have stopped trying to fix the wifi issue but it is important. The workaround even works at restart, with some delay, but it works!
Just to clarify to newbies like me, where ssid you have to put the name of the network you want to connect. I wonder if one can add more networks, so it can connect to any saved network according to where you are. You think that's possible?

nicospanas said:
It works! Thank you so much! It seems the LOS developers have stopped trying to fix the wifi issue but it is important. The workaround even works at restart, with some delay, but it works!
Just to clarify to newbies like me, where ssid you have to put the name of the network you want to connect. I wonder if one can add more networks, so it can connect to any saved network according to where you are. You think that's possible?
Click to expand...
Click to collapse
That would be great.. I shall try.. if successful, I shall post results.

I have a uk410, the US Cellular variant of the v410. I tried the CM12.1 "stable" release cm-12.1-20151117-SNAPSHOT-YOG7DAO1K5-v410.zip found here (archive.org/download/cmarchive_snapshots), along with Open GApps nano for 5.1 (opengapps.org/?api=5.1), and quickly got the infinite rebooting issue.
I then switched to the Telsa ROM mentioned earlier in this thread (Tesla-v410-5.1.1.High_Voltage.2.2.1-Release-20150902.zip) found at androidfilehost.com/?fid=24052804347807214, again with Open GApps nano for 5.1 (build open_gapps-arm-5.1-nano-20180922.zip), and have been running it with no issues for two days. My wifi is connected, and stays connected (tested two different routers), Play Store and apps have been working fine, and no crashes so far.
I'm using TWRP 3.1 (twrp-3.1.0-0-v410.img).
Thanks for mentioning Tesla, @jason2678 !

So like all of you I was looking for a rom to install on this v410 7" tablet, and it looks like I should just give up or stick with 4.4.2 stock if I want to go through the rooting process.
Basically all the development roms end with the same problems, wifi dropping, hostspot not working, no ir blaster, volume problems, bluetooth errors, and several hundred posts about lolipop memory leaks crippling the tablet because of only 1gb mem.
So, I am asking all of you, is there any real reason to root it, besides going back to stock 4.4.2?
And lastly, is the stock 4.4.2 kdz image that is floating around a test version, and if so is there an actual official kdz image somewhere that isn't a test image?
Thanks...

CrDroid by far in my opinion. Lineage based, 7.1.2.
Also, e/ os has been unofficially released. No Google anything...an entirely new Google list operating system by lineage. It's lightning fast and runs magisk perfectly. It's basically like nothing you've ever seen before and if you look under LG g pad 7.0 on Android file host, go to the second page and click on the last user who goes by the name anonymous and you'll find the ROM there. I had no idea what it was until my g pad boot it up and I saw the e logo. I pretty much **** myself in excitement

Zuk Z2 Plus Touch Freeze

Hello Guys! I recently started to notice a very odd issue on my zuk z2 plus. I currently am running AospExtended ROM V6.4 (Android 9, Pie) with magisk installed. But this problem started before magisk was installed.
What happens is when i unlock my phone, after a mere 2 seconds, the touch absolutely freezes. I mean the screen is on, hardware buttons (U touch, Power & Volume Rocker) work, and i can even receive notifications, which means the phone is working, but the screen is not? If I turn off the device (Not Power Off, Just a tap of the power button) and unlock again, the touch resumes, but only for 2 seconds. This can be done infinitely. Reboots, shutdowns, forced power off, recovery etc all seem to go in vain, though some lucky reboots can save the day. Also, if I unlock the phone and then open google in a flash and start typing anything, it sometimes works and the touch resumes. This issue also persists in Safe Mode. ​
My issue is also very similar to the one seen here :
Video (Not By Me) : https://www.youtube.com/watch?v=JdMbbML9ECg
Forum : https://forum.xda-developers.com/lenovo-zuk-z2/help/touch-issue-t3708645
Keep in mind that I faced the same issue on my previous rom, Resurrection Remix v6.0 Oreo. I can always provide additional information if anyone wants. If anyone has faced the same issue, or has the fix to this, please do tell me as it is very difficult to manage.

Did you change something in root partition. I had the same issue in msm xtended when i deleted some app from system but after dirty flash it was solved.

bisht ankur said:
Did you change something in root partition. I had the same issue in msm xtended when i deleted some app from system but after dirty flash it was solved.
Click to expand...
Click to collapse
No, I did not do anything, also, the issue persists in safe mode too, so that means no 3rd party app is causing it.

Jodh5634 said:
No, I did not do anything, also, the issue persists in safe mode too, so that means no 3rd party app is causing it.
Click to expand...
Click to collapse
It could be a rom issue, try posting it on rom thread. Sorry i may be of no help.

have you tried to QFIL to latest zui and observe if the issue persist in zui as well??

Same problem here. Never rooted my z2, don't even have twrp installed. Always have been on 2.5.104 ST rom.
Really frustrating issue caused by Lenovo. Will ever avoid any Lenovo devices in future.

****
Same problems happening with mine too
I think that my hardware problem but now i guess its every one problem slowly

As a matter of update:
I got my z2 repaired locally. Service diagnosed short-circuit failure of the sensor. Nasty /really wanted to use another word here/ production quality by lenovo. Cost me around $60.

Question Soft Reboots After Every Reboot [SOLVED]

EDIT: Apparently this was a result of using the wrong setting for enabling hotspot in PropsConfig. Because all that stuff was set during bootup, deleting apps wouldn't change the situation. Setting worked fine on my Pixel XL, but not here. Changed the setting and all is well.
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So, this is a weird issue I was curious about and may have missed on my searching. Every time I reboot the phone, when I got to log in it immediately follows up with a soft reboot. It's been happening for a while, and I'm not sure the source of the issue.
Running stock 12 ROM and rooted, but I disabled SU, modules, and Nova and am still running into the issue.

Might be quicker and easier to back up your required files and just factory reset.

Texan1 said:
Might be quicker and easier to back up your required files and just factory reset.
Click to expand...
Click to collapse
*sigh* I kinda made this post to avoid that step.

somethingsomethingroot said:
*sigh* I kinda made this post to avoid that step.
Click to expand...
Click to collapse
I know, it's just that it sounds like you've already disabled some things that could be causing it, which hasn't helped. If it was me, with something like constant reboots, I'd want to start fresh just to make sure they are eliminated for good

somethingsomethingroot said:
So, this is a weird issue I was curious about and may have missed on my searching. Every time I reboot the phone, when I got to log in it immediately follows up with a soft reboot. It's been happening for a while, and I'm not sure the source of the issue.
Running stock 12 ROM and rooted, but I disabled SU, modules, and Nova and am still running into the issue.
Click to expand...
Click to collapse
I've seen reports of "random" (=not intentional) reboots after
+ booting up the phone
+ using the FP scanner
+ making videos or shooting photo
+ doing a firmware update (I've seen both reports of ppl that "officially" OTAed & used manual flashing)
+ doing nothing
+ doing something
Some were able to fix their issues by factory resetting, some needed replacement devices. Some reported that even after a factory reset, the issue still persisted, but they were able to fix it by NOT using a backup via cable, some reported that even the Google Drive backup "corrupted" their phone (fix after setting up everything by hand from scratch). Some even reported their issues to get fixed via a software update.
So it seems to be connected to hardware (= replacement device) and/or software simultaneously (=fix via reset).
Strange this is since there are also numerous reports of Samsung owners that upgraded to A12 about random reboots. So it might even be something Android 12 related, or it's just Samsung also implementing similar bugs without it being A12 related (unlikely, since the reports seem to be centered around people using the new A12 update).
I also had the random reboot problem (~ 6 times a day, when doing nothing, it just rebooted when the phone layed on the table in idle). I wasn't able to fix it via a reset, so I got a replacement device.
I also have the "random" reboot problem on my Pixel 3 since upgrading to Android 12 (never had any issues all the years I've been using that phone), so that issue is clearly caused by A12, but I haven't troubleshot it/ tried to solve it, since I don't actively use the phone currently.
Aside from trying a factory reset and minding the backup issue (especially backups that you got from phones that did NOT have Android 12), there is not much more that you can do (ofc you could also use the Pixel repair/android flash tool to do a "clean" install of Android on your phone). Next step would be to contact Google.