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[Q] reverting from custom kernel to stock?

sorry if this doesn't quite belong here but I was curious to go back just to stock kernel, not completely stock itself. Could anyone link me to a good step by step for me to do this? Do i use adbfastboot the boot.img only? Im just a a little confused..
Sorry I am still new and learning. Thanks for any help!

Download the relevant kernel to your device from here.
Reboot to recovery
Install the zip you just downloaded
This stuff tends to be a lot simpler than you'd expect, tbh.

dallas220 said:
sorry if this doesn't quite belong here but I was curious to go back just to stock kernel, not completely stock itself. Could anyone link me to a good step by step for me to do this? Do i use adbfastboot the boot.img only? Im just a a little confused..
Sorry I am still new and learning. Thanks for any help!
Click to expand...
Click to collapse
Download the factory images from Google : https://developers.google.com/android/nexus/images#hammerheadkot49h
Extract the boot.img and flash it via fastboot.. (fastboot flash boot boot.img)
Make sure your on stock rom before you flash it..
Sent from my Nexus 5 using Tapatalk

dallas220 said:
sorry if this doesn't quite belong here but I was curious to go back just to stock kernel, not completely stock itself. Could anyone link me to a good step by step for me to do this? Do i use adbfastboot the boot.img only? Im just a a little confused..
Sorry I am still new and learning. Thanks for any help!
Click to expand...
Click to collapse
Fastboot, you flash with fastboot and yes the kernel image is boot.img. You should probably also reflash your ROM (system.img if you're on the stock ROM) as many custom kernels also modify the system partition.

BirchBarlow said:
Fastboot, you flash with fastboot and yes the kernel image is boot.img. You should probably also reflash your ROM (system.img if you're on the stock ROM) as many custom kernels also modify the system partition.
Click to expand...
Click to collapse
Thanks for all the replies guys!
I am indeed on stock rom. To flash the system.img is pretty much the same as the boot.img yes?

dallas220 said:
Thanks for all the replies guys!
I am indeed on stock rom. To flash the system.img is pretty much the same as the boot.img yes?
Click to expand...
Click to collapse
Hi,
Same way: http://forum.xda-developers.com/google-nexus-5/general/tutorial-how-to-flash-factory-image-t2513701.

Hammer_Of_The_Gods said:
Hi,
Same way: http://forum.xda-developers.com/google-nexus-5/general/tutorial-how-to-flash-factory-image-t2513701.
Click to expand...
Click to collapse
Thank you brother
And just to add to my noobness.. Returning to stock kernel and or rom doesn't wipe any files on the phone correct? Ie picture data etc....?

dallas220 said:
Thank you brother
And just to add to my noobness.. Returning to stock kernel and or rom doesn't wipe any files on the phone correct? Ie picture data etc....?
Click to expand...
Click to collapse
As long as you don't flash the userdata.img, you are fine!
If you are using the flashall script then remove the -w flag and you're good to go!
Sent from my Nexus 5 using Tapatalk

vin4yak said:
As long as you don't flash the userdata.img, you are fine!
If you are using the flashall script then remove the -w flag and you're good to go!
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
I plan on flashing sys and boot!
And so sorry but what do you mean the flashall srcipt?
Would that be basically flashing everything to stock?
Sorry for such dumb questions

dallas220 said:
I plan on flashing sys and boot!
And so sorry but what do you mean the flashall srcipt?
Would that be basically flashing everything to stock?
Click to expand...
Click to collapse
So no worries since you don't flash all (you use the "Method2" from the link I posted above), about the "flash-all.sh" file, when you open the factory image file, you have this script, more info here about the "-w" to delete: http://forum.xda-developers.com/showpost.php?p=51949577&postcount=4.

Hammer_Of_The_Gods said:
So no worries since you don't flash all (you use the "Method2" from the link I posted above), about the "flash-all.sh" file, when you open the factory image file, you have this script, more info here about the "-w" to delete: http://forum.xda-developers.com/showpost.php?p=51949577&postcount=4.
Click to expand...
Click to collapse
thanks for you help my brother. Just another question.. If I have a nandroidbackup on the computer that I made before I installed my custom kernel, could you somehow use that to get back to the stock kernel? Is that something...or I am just asking the most ridiculous questions?
It seems the more I read, the less I am confident with adb, flashing, backups etc.... :S

dallas220 said:
thanks for you help my brother. Just another question.. If I have a nandroidbackup on the computer that I made before I installed my custom kernel, could you somehow use that to get back to the stock kernel? Is that something...or I am just asking the most ridiculous questions?
It seems the more I read, the less I am confident with adb, flashing, backups etc.... :S
Click to expand...
Click to collapse
If want the stock kernel download the factory images from google and flash the boot.img via fastboot. That's the easiest way.
If you still want to use nandroid backup then copy the nandroid backup to the correct location... Head over to Philz Touch recovery and use the custom restore option by which you can select only the "boot" and "system" partition. But I haven't tried doing it so can't say whether it will work or not. However, technically it should work. I have no idea how to do this using TWRP though as I haven't used it much.

Modified Boot Image Android L (5.0.0_LRX21P)

Guys, use this modified boot image to flash the newest Android L (5.0.0_LRX21P)
Flash in Bootloader (this is not a flashable zip)!!!!
Flash the stock root able rom, here available on xda.
Don't worry it's for our FLO device, just a name. Sorry, i was in a hurry.
Have fun

Jerome-X said:
Guys, use this modified boot image to flash the newest Android L (5.0.0_LRX21P)
Flash in Bootloader (this is not a flashable zip)!!!!
Flash the stock root able rom, here available on xda.
Don't worry it's for our FLO device, just a name. Sorry, i was in a hurry.
Have fun
Click to expand...
Click to collapse
Whats modified about it?

use this, if you want to flash the stock rooted rom via twrp etc...
if you use the stock one, your bootloader is locked after flash the stock rom

Jerome-X said:
use this, if you want to flash the stock rooted rom via twrp etc...
if you use the stock one, your bootloader is locked after flash the stock rom
Click to expand...
Click to collapse
Incorrect mate, it's still unlocked after flashing factory images. I flashed factory files yesterday and I only lost root and recovery which I expected to happen.

topgeardave said:
Incorrect mate, it's still unlocked after flashing factory images. I flashed factory files yesterday and I only lost root and recovery which I expected to happen.
Click to expand...
Click to collapse
Correct!
Op tell me exactly what you did here? Your talking about one thing but saying another. I dont get it

scrosler said:
Correct!
Op tell me exactly what you did here? Your talking about one thing but saying another. I dont get it
Click to expand...
Click to collapse
It's just the latest bootloader.img, he thinks if you flash it separately you won't lock your bootloader before flashing the stock rom via recovery.

To my knowledge, nothing locks the bootloader, except you (via fastboot or a toolkit).

So i can install the stock image i downloaded from google and still keep root? What about recovery?
Sorry for noob question, i've only used custom ROMs in the past.

If you flash the stock L image with fastboot, you lose root and recovery but your boot loader stays locked/unlocked (whatever it was before).
To get recovery back, just flash it with fastboot.
To get root back, flash the boot image from the OP or a modified kernel like ElementalX and then flash SuperSU.
Done.
Sent from my LG-D801

Thanks for the answer.

Nexus 5 bootloops even after doing a factory reset?

I tried to get rid of root by going into the supersu app and clicking the uninstall option. It then rebooted, but it went into a bootloop. I already wiped multiple times but nothing happened.
Could it be because of xposed being installed?
Thanks.

Was stock recovery used to perform the factory reset?

audit13 said:
Was stock recovery used to perform the factory reset?
Click to expand...
Click to collapse
No, I used TWRP to do it. v2.8.7.0 I think.

Try with stock recovery.

audit13 said:
Try with stock recovery.
Click to expand...
Click to collapse
How would I uninstall TWRP recovery?

Flash the recovery.img file that is included with the stock rom. Fastboot flash recovery recovery.img.

audit13 said:
Flash the recovery.img file that is included with the stock rom. Fastboot flash recovery recovery.img.
Click to expand...
Click to collapse
Hmm, still boot loops. Am I forced to just reflash the fctory image?

Since it still bootloops, I recommend flashing back to a completely stock ROM to make sure the phone still functions properly.

audit13 said:
Since it still bootloops, I recommend flashing back to a completely stock ROM to make sure the phone still functions properly.
Click to expand...
Click to collapse
Dang. I wish I wouldn't have to wipe my files, but there aren't That many important stuff. Thanks.

audit13 said:
Since it still bootloops, I recommend flashing back to a completely stock ROM to make sure the phone still functions properly.
Click to expand...
Click to collapse
Sorry for this, but could you also help me install nonsystemless root? systemless causes trouble with layers so it would be very nice if you could help.
Thanks

Which rom is on the phone? For stock LP, flash supersu from twrp. Many custom mm ROMs are prerooted.

audit13 said:
Which rom is on the phone? For stock LP, flash supersu from twrp. Many custom mm ROMs are prerooted.
Click to expand...
Click to collapse
Wait the nonsystemless root is gotten by just flashing it? I always thought it was the other way.
Thanks so so so much for your help!

Can modified boot.img be flashed while oxygen 5.1.8 is running?

I'm running 5.8.1 stock rom Franco Kernel. The app says it can, is this true?
Also is there a stock 5.1.8 boot.img file that has TWRP installed into it that can be flashed by Francos app.
Any info appreciated

What you need to do exactly?

lgvoelkernet said:
I'm running 5.8.1 stock rom Franco Kernel. The app says it can, is this true?
Also is there a stock 5.1.8 boot.img file that has TWRP installed into it that can be flashed by Francos app.
Any info appreciated
Click to expand...
Click to collapse
The kennels can be flashed while system is running because it's a different partition and when it flashes, it keeps TWRP and magisk in tact.

mikex8593 said:
The kennels can be flashed while system is running because it's a different partition and when it flashes, it keeps TWRP and magisk in tact.
Click to expand...
Click to collapse
Thanks. Now for a stock boot.img modified only with TWRP in it

Hitman478™ said:
What you need to do exactly?
Click to expand...
Click to collapse
I need to flash 5.1.8 boot.img, one that has TWRP in it.
I DON'T HAVE ACCESS TO A PC so adb and fastboot are out.
And I have stock recovery, can't flash from there ?
That's what's up. ?

lgvoelkernet said:
I need to flash 5.1.8 boot.img, one that has TWRP in it.
I DON'T HAVE ACCESS TO A PC so adb and fastboot are out.
And I have stock recovery, can't flash from there
That's what's up.
Click to expand...
Click to collapse
You need custom recovery or fastboot, otherwise, impossible, as far as I know.

lgvoelkernet said:
I need to flash 5.1.8 boot.img, one that has TWRP in it.
I DON'T HAVE ACCESS TO A PC so adb and fastboot are out.
And I have stock recovery, can't flash from there
That's what's up.
Click to expand...
Click to collapse
Have you asked Franco if this is possible? You can flash kernels while booted, so I don't see a reason you couldn't also flash recovery. The kernel, recovery, and magisk are all in the boot partition together.
However, I have no idea if the kernel flashers (EXKM can also do it) can flash a full boot.img properly.

iElvis said:
Have you asked Franco if this is possible? You can flash kernels while booted, so I don't see a reason you couldn't also flash recovery. The kernel, recovery, and magisk are all in the boot partition together.
However, I have no idea if the kernel flashers (EXKM can also do it) can flash a full boot.img properly.
Click to expand...
Click to collapse
Best idea so far, will check.!

T-Mobile 9.5.5 boot.img

Does anyone happen to have this? I used the 9.5.3 img for the TWRP with working decrypt, and it booted fine once, however now it keeps booting back to TWRP despite selecting "reboot system." I think someone mentioned they had it, but I can't find it for the life of me. Thanks so much!

No, don't think there are any full zips for T-Mo yet.

Bradl79 said:
No, don't think there are any full zips for T-Mo yet.
Click to expand...
Click to collapse
Thanks for the heads-up I actually got it to boot again by flashing SkyDragon kernel and Magisk!

sabrdawg said:
Thanks for the heads-up I actually got it to boot again by flashing SkyDragon kernel and Magisk!
Click to expand...
Click to collapse
How did this fix the boot image? How did your flash TWRP? The one with decryption or no?

photolarry said:
How did this fix the boot image? How did your flash TWRP? The one with decryption or no?
Click to expand...
Click to collapse
I flashed the TWRP with working decrypt. The only problem is, is that I just tried restoring a backup with it, and now I can't get out of fastboot mode. Downloading MSM Tool now :/

MSM Tool?
sabrdawg said:
I flashed the TWRP with working decrypt. The only problem is, is that I just tried restoring a backup with it, and now I can't get out of fastboot mode. Downloading MSM Tool now :/
Click to expand...
Click to collapse
Where is it? They said it is not out yet.

Here you go
https://forum.xda-developers.com/oneplus-7-pro/how-to/msm-tool-guac-t3934691

In case you still need it, I'm fairly certain this is the boot image for GM31CB 9.5.5. I extracted it from my own device when I was flashing the international firmware. I will be honest, it might have the Chinese TWRP patched in. I doubt it though since it I can't find any of the TWRP files in the decompiled image.
https://drive.google.com/open?id=1nla0OCUpFL01CnVM5vm0G4aQ1gZ6cupI

bmg1001 said:
In case you still need it, I'm fairly certain this is the boot image for GM31CB 9.5.5. I extracted it from my own device when I was flashing the international firmware. I will be honest, it might have the Chinese TWRP patched in. I doubt it though since it I can't find any of the TWRP files in the decompiled image.
https://drive.google.com/open?id=1nla0OCUpFL01CnVM5vm0G4aQ1gZ6cupI
Click to expand...
Click to collapse
Thank you!

bmg1001 said:
In case you still need it, I'm fairly certain this is the boot image for GM31CB 9.5.5. I extracted it from my own device when I was flashing the international firmware. I will be honest, it might have the Chinese TWRP patched in. I doubt it though since it I can't find any of the TWRP files in the decompiled image.
https://drive.google.com/open?id=1nla0OCUpFL01CnVM5vm0G4aQ1gZ6cupI
Click to expand...
Click to collapse
You had to root in order to extract boot IMG correct?

Nekromantik said:
You had to root in order to extract boot IMG correct?
Click to expand...
Click to collapse
No, I flashed TWRP to the opposite partition and extracted it there.

bmg1001 said:
No, I flashed TWRP to the opposite partition and extracted it there.
Click to expand...
Click to collapse
hmm
the instructions for installing twrp mentions having stock boot.img in order to install it
how did you flash to second slot without a stock boot.img?

Nekromantik said:
hmm
the instructions for installing twrp mentions having stock boot.img in order to install it
how did you flash to second slot without a stock boot.img?
Click to expand...
Click to collapse
I didn't use the guide. I flashed TWRP (the TWRP image that is provided in that same thread) to the opposite partition.

bmg1001 said:
I didn't use the guide. I flashed TWRP (the TWRP image that is provided in that same thread) to the opposite partition.
Click to expand...
Click to collapse
ah ok
not sure I wanna risk anything as no msmtool guaranteed for the 5g version.