Not so bricked P2... - Lenovo P2 Questions & Answers

I just experienced a strange issue with my P2, and I'd like to hear some opinions/solutions.
I've been running the deodexed S244 ROM for a while now (unlocked bootloader, TWRP, root), no problems. However, AEX 4.6 (Nougat) intrigued me, so I decided to try it and flashed it. I made a TWRP backup of the previous ROM.
After using AEX for a while, concluding I'd rather stick to the deodexed ROM, I rebooted to recovery and restored the backup. Upon restarting, only a black screen awaited. Nothing else, as if it had powered off. Rebooting makes no difference.
I tried restoring the backup twice more, getting the same result: black screen.
Then I tried flashing the deodexed 244 over itself, and got the black screen with the blue led issue!
After 2 hours battling, I gave up and tried restoring AEX's backup (yes, I made one too, in case I ever wanted to go back), and it's working fine!
So how can I go back to stock? Or deodexed stock? I have to flash the stock ROM through fastboot? Any ideas what causes this?

Ok, I admit the information I presented was a bit unclear, and that's because it was unclear to me as well...
After a huge lot of trial and error, I ended up flashing the boot.img from the deodexed 244, which solved the issue. I guess there was some error along the way, and restoring it helped.
So problem solved

Related

What happen??

I restore back my stock ROM from LeeDroid 2.2.2.. and out of a sudden all the apps will close itself. Then later on the screen turns black color(the device is not off, still on)
I have to remove the battery then only i can on it back. But later this problem occurs again after like.. 5-10 minutes later while im "browsing" around. Once it occurs again i have to repeat the process again.(remove battery)
Any idea what happen??
Could you tell how you restored the stock rom so we have something to start with?
Hi Hawks556
As usual i restore back my stock ROM using CWM.
Tap ROM Manager >> Manage and Restore >> and i tap the back-up(i.e. the stock ROM)
Once it finish boot to home screen.. i just play with it around.. and trying to get GPS signal. then later out of a sudden all app close automatically.. then it became a black screen.
Hmm.. but now it seems to be behaving again. But still curious what cause such incident to occur. Did I brick my device? =(
If you'd bricked your device you wouldn't be using it.
But the problem is probably with CWM, there's always a possibility that it doesn't make a perfect backup or restore. I have also noticed that restoring a backup from a different rom can cause issues. If you wan't to return to stock at some point i recommend flashing a RUU.
Really. I did not know that. Lol. Cause all the while I restore/flash I never experience it before. And finally now i did it.
Anyway I flash back to LeeDroid and the problem of "turning into black screen" didnt happen. So i guess like what you mention.. issues restoring back from different ROM.
Thank you! =)

[SOLVED][Q] ART building bootloop - anyone else seen this?

Hi, Ive not long had my m9. When i got it it updated straight away and got the charging bug.
Since then I have s-off'd and tried various roms with not too much luck.
I now have a bug that occurs when i flash a new rom. This has happened when i flashed 3 different roms. Leedroid, Viper and android revolution. the rom flashes ok, then starts to boot, and builds art. It then finishes building art and starts to complete the boot process, and then it reboots and tries to build art again.
I flash back to my stock backup and everything is fine again. (apart from the damned charging bug)
Has anyone else experienced something similar?? am i missing something??
Go in twrp and make factory reset
just tried that, didnt work
Did you update your firmware? if you're still on 1.x firmware, those 2.x roms will reboot.
yeah. have tried matching roms to firmware and still get the same result. trying viper one currently. in a massive bootloop again. It boots enough to say "nfc service has stopped working" and thats what made me think it might be firmware, but it seems to make no difference.
cant even adb whilst its booting.. getting waiting for device.
What version of twrp are you using?
2.8.6.1
philicibine said:
2.8.6.1
Click to expand...
Click to collapse
Update to 2.8.7.0 and see if it continues.
I've solved this, and my charging issue. Finally!!
I decided to flash the earliest ruu I could find and then let it do all of the ota updates itself.
I then rerooted, flashed updated firmware and am now running leedroid.
Thanks for the help guys.

Boot loop issue when battery dies or on abrupt restart

I'm running stock 5.1.1 rooted. Whenever the battery dies on the tablet, it will go into a bootloop when I charge it and turn it back on (gets to Samsung logo with no start up music). So far, that only thing that seems to work is wiping data. Has anyone experienced something similar? Bad install maybe?
I've had the same thing happen to me last night. I tried everything and nothing worked. I had to restore a old back up i had with twrp and it started fine. Not sure what causes it though.
I've been having this problem for 6 months now. Let me try a custom rom.
dkb218 said:
I've been having this problem for 6 months now. Let me try a custom rom.
Click to expand...
Click to collapse
Update the twrp tp latest version.I had the ame problem with old twrp but now all is fine with 3.0.2.0.
mine just started doing this. i can boot into recovery but the touch screen doesn't respond. i can also get into odin. I believe i was running Rooted Stock 5.1.1. Should i just reflash (i was thinking of going custom like LineAge) or do i need to reflash stock rom? I was also reading about just flashing the PIT and EFS. i know it's a 3 year old tablet at this point, but it's been good to me and i'd like to increase my odds of bringing it back to life

Frequent freezes and hangs after rooting and installing twrp

So I followed the instructions here: http://galaxynote4root.com/galaxy-note-4-root/how-to-root-unlock-bootloader-on-galaxy-note-4/
Everything was great at first, but it slowly degraded. At first it was only occasional hangs, then it got worse and worse. I reinstalled with the retail cpa1 5.1.1 install, which removed root, and again everything was fine for a bit, then it got worse again. I'm on call for work and away from my computer for the day so I let it take the 6.0.1 OTA hoping it would fix the freezing problems, but nothing has changed.
What can I do differently to fix these freezing problems? I completely redid the instructions on that website hoping it would fix the issues, but the same thing happened again. Amazingly fast at first, then slowly degrading into frequent hanging or freezing. Thanks!
aclays said:
So I followed the instructions here: http://galaxynote4root.com/galaxy-note-4-root/how-to-root-unlock-bootloader-on-galaxy-note-4/
Everything was great at first, but it slowly degraded. At first it was only occasional hangs, then it got worse and worse. I reinstalled with the retail cpa1 5.1.1 install, which removed root, and again everything was fine for a bit, then it got worse again. I'm on call for work and away from my computer for the day so I let it take the 6.0.1 OTA hoping it would fix the freezing problems, but nothing has changed.
What can I do differently to fix these freezing problems? I completely redid the instructions on that website hoping it would fix the issues, but the same thing happened again. Amazingly fast at first, then slowly degrading into frequent hanging or freezing. Thanks!
Click to expand...
Click to collapse
What model?(network)
aclays said:
So I followed the instructions here: http://galaxynote4root.com/galaxy-note-4-root/how-to-root-unlock-bootloader-on-galaxy-note-4/
Everything was great at first, but it slowly degraded. At first it was only occasional hangs, then it got worse and worse. I reinstalled with the retail cpa1 5.1.1 install, which removed root, and again everything was fine for a bit, then it got worse again. I'm on call for work and away from my computer for the day so I let it take the 6.0.1 OTA hoping it would fix the freezing problems, but nothing has changed.
What can I do differently to fix these freezing problems? I completely redid the instructions on that website hoping it would fix the issues, but the same thing happened again. Amazingly fast at first, then slowly degrading into frequent hanging or freezing. Thanks!
Click to expand...
Click to collapse
go install a custom rom like jasmineROM or EmotionOS, straight up stock can sometimes be unstable when you are rooted.
ziggy71 said:
What model?(network)
Click to expand...
Click to collapse
Verizon SM-N910V retail
weard1212 said:
go install a custom rom like jasmineROM or EmotionOS, straight up stock can sometimes be unstable when you are rooted.
Click to expand...
Click to collapse
I can't even get it stable on full stock. I Odin'd in the Full Firmware for CPF3 in this thread: [Firmware] [Official] Firmware / Kernel / Modem / Recovery [N910VVRU2CPF3] by hsbadr which overwrote TWRP and seemingly removed all traces of rooting, yet the instability is still there.
It occasionally is giving me the error "System process stopped", occasionally is rebooting entirely, there have been a few times where it wouldn't boot up at all. I had to pull the battery and leave it out for 5-10 minutes to get it to boot. I'm running out of ideas on what to flash over to fix it. Is it possible that the Kernel I installed while rooted is causing problems? The full firmware for CPF3 should have overwritten it, correct?
aclays said:
Verizon SM-N910V retail
I can't even get it stable on full stock. I Odin'd in the Full Firmware for CPF3 in this thread: [Firmware] [Official] Firmware / Kernel / Modem / Recovery [N910VVRU2CPF3] by hsbadr which overwrote TWRP and seemingly removed all traces of rooting, yet the instability is still there.
It occasionally is giving me the error "System process stopped", occasionally is rebooting entirely, there have been a few times where it wouldn't boot up at all. I had to pull the battery and leave it out for 5-10 minutes to get it to boot. I'm running out of ideas on what to flash over to fix it. Is it possible that the Kernel I installed while rooted is causing problems? The full firmware for CPF3 should have overwritten it, correct?
Click to expand...
Click to collapse
I've had some issues myself. I originally used paul pizz PJ2, which is an awesome rom. Gives you stability of stock, but feel of custom. I then went to PL1 and EmotionOS. After a few days, I noticed, reduced connectivity, camera wouldn't focus, and button reassignments. So, I just wiped cache and Dalvik, stuck in boot loop. I downloaded the newest EmotionOS. Wiped everything, installed it. boot loop. So I did a another wipe and installed the deodexed Ricks ROM V2. So far so good, but it has only been a day. If you do a full retail firmware flash, that should fix your issues. If you did a full firmware, then yes, it would be overwritten. Try going back to 5.1.1 PA1 full firmware flash. Then you could allow the phone to take the OTA if you wish. But, that should fix the issue. If not let me know. And I will keep you informed of the new rom. Also, if you have a card reader, check your sd. Take anything that you want off of it, and wipe it as well. These Notes are finicky.
ziggy71 said:
I've had some issues myself. I originally used paul pizz PJ2, which is an awesome rom. Gives you stability of stock, but feel of custom. I then went to PL1 and EmotionOS. After a few days, I noticed, reduced connectivity, camera wouldn't focus, and button reassignments. So, I just wiped cache and Dalvik, stuck in boot loop. I downloaded the newest EmotionOS. Wiped everything, installed it. boot loop. So I did a another wipe and installed the deodexed Ricks ROM V2. So far so good, but it has only been a day. If you do a full retail firmware flash, that should fix your issues. If you did a full firmware, then yes, it would be overwritten. Try going back to 5.1.1 PA1 full firmware flash. Then you could allow the phone to take the OTA if you wish. But, that should fix the issue. If not let me know. And I will keep you informed of the new rom. Also, if you have a card reader, check your sd. Take anything that you want off of it, and wipe it as well. These Notes are finicky.
Click to expand...
Click to collapse
So I did actually go back to stock 5.1.1 and successfully take the 6.0.1 OTA, the issue didn't resolve. At that point I flashed the full stock CPF3, still no changes.
A new thing has popped up too. When I try to boot into recovery it says it's installing an update, then after about 5 minutes it goes to a black screen and nothing happens. I end up having to pull the battery to restart it. Discovered that when I tried to go clear all the caches and such before flashing CPF3, and it is still doing the same thing after flashing CPF3. I thought that by flashing the full firmware for CPF3 it would solve that.
aclays said:
So I did actually go back to stock 5.1.1 and successfully take the 6.0.1 OTA, the issue didn't resolve. At that point I flashed the full stock CPF3, still no changes.
A new thing has popped up too. When I try to boot into recovery it says it's installing an update, then after about 5 minutes it goes to a black screen and nothing happens. I end up having to pull the battery to restart it. Discovered that when I tried to go clear all the caches and such before flashing CPF3, and it is still doing the same thing after flashing CPF3. I thought that by flashing the full firmware for CPF3 it would solve that.
Click to expand...
Click to collapse
So you are full stock? Does the update issue happen on the stock recovery?
ziggy71 said:
So you are full stock? Does the update issue happen on the stock recovery?
Click to expand...
Click to collapse
Yep it did. So I think I've actually fixed it now. I thought that flashing the full firmware would also flash the boot loader and modem, but I Odin'd both of those in and so far so good! It did the whole updating thing again just like before this time, but when it was done it actually loaded up recovery like it was supposed to. So at that point I wiped the cache, factory reset, then used Odin to flash in the boot loader and modem for CPF3 that I found in that thread.
I've been using my phone and installing things for a couple hours now and haven't had a single hang. Before I did this, it would hang very quickly. Maybe I'll get brave and try rooting and whatnot again later, but for now I'm just going to back off for a bit. Thanks for the help!
And so much for that. It was more stable than it had been in ages so I started installing all my apps and whatnot, now it's just as unstable as it used to be, just took a couple days to happen. I'm running out of ideas

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.

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