Need help going to custom kernel - OnePlus 7 Pro Questions & Answers

So I'm running stock kernel with the latest version of blissROM and Magisk installed with a few modules but I want to get DriveDroid working. To do that I need a custom kernel that allows the OP7P to act as a USB flash drive then the computer can boot from the phone.
Just for fun I tried to flash a kernel awhile back through ExKernelManager and all it did was brick the phone. Once I got it back and running I tried again, through TWRP and the same thing happened.
I prefer to flash the kernel through TWRP but I'd like someone to tell me what steps I should go through to make this work. Any help would be appreciated!!!

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I'm trying to avoid another brick PLEASE HELP

Howdy y'all. I bricked my old G2 D800, I don't want a repeat with the new one. I tried doing all the research I could. I have a new D800, 10d, 4.4.2. I want CM11, tried reading the threads on that and custom recovery. I just need a little help to make sure I have the order of operations down pat before I crash another. I've rooted and flashed ROMs before, but not with th locked boot loader and security AT&T has.
Please just correct me if I'm wrong. Through the threads I have read I believe this is what I am to do.
1.) Flash my 4.4.2 back to 4.2.2 using LG FT
2.) Root using IO23
3.) Download Flashify & install TWRP 2.7.7 with Loki
4.) Follow steps to install CM 10.2
5.) Follow steps to install CM 11
Of course make backup once 4.2.2 plus root and TWRP is achieved before trying CM. I just want CM like I've had on previous phones. Thanks in advance.
All is good back to being ROM junkie. Anyone who does read and wishes to flash custom roms and get custom recovery on KK. Obtain root via IOroot25, then use AutoRec Recovery Installer for TWRP recovery.

[Q] Problem that happened using Multirom, now i have an unusable phone

I had the latest version of CM11 on my Opo 64 GB, was also using Multirom and Miui 4.10.24.
Tried to install the 4.10.31 version, but i did it wrong (i did not go into TWRP, then Multirom, add zip and install, but i just selected install rom and flashed the 4.10.31 zip file).
Now, the main CM11 OS is lost, i cannot boot into it, and i cannot also boot into MIUI.
So, how can i get my CM11 back?
I tried flashing the official version but it gives me error while trying to install it through TWRP.
Also if i reboot the phone and try to choose the MIUI it says
"error, kexec-hardboot support is required to boot this rom.
install kernel with kexec-hardboot support to your internal rom.
Any help would be greatly appreciated!
kidstretch said:
I had the latest version of CM11 on my Opo 64 GB, was also using Multirom and Miui 4.10.24.
Tried to install the 4.10.31 version, but i did it wrong (i did not go into TWRP, then Multirom, add zip and install, but i just selected install rom and flashed the 4.10.31 zip file).
Now, the main CM11 OS is lost, i cannot boot into it, and i cannot also boot into MIUI.
So, how can i get my CM11 back?
I tried flashing the official version but it gives me error while trying to install it through TWRP.
Also if i reboot the phone and try to choose the MIUI it says
"error, kexec-hardboot support is required to boot this rom.
install kernel with kexec-hardboot support to your internal rom.
Any help would be greatly appreciated!
Click to expand...
Click to collapse
I'm probably not understanding, but can you boot from off , into recovery then > TWRP?
JeffDC said:
I'm probably not understanding, but can you boot from off , into recovery then > TWRP?
Click to expand...
Click to collapse
Yes I can, managed to install MIUI only, latest version.
I also installed Multirom again (on MIUI) and it downloaded cm11s kernel).
Ok managed to go back to my old miui os, now I have 2 miui os and no cm11, also downloaded the Franco kernel 30. How can i check if the cm11 that i had before is still there, if not how can i install it again without screwing my already working miui?
update:
After some tests, this is what's happening.
I believe I have no CM11S on my phone, that is gone!
I have the MIUI V5 running, but when i flash the franco kernel, the phone is stuck on boot (1+1 logo), i have to flash the kernel_kexec_bacon_cm11s to make it boot in MIUI (working).
So, now i have a working rom that works through Mutlirom and I cannot flash a working CM11S rom on the phone.
Any help would be great guys!

Where is the recommended method for rooting Android M Preview 3?

I'm hoping to root my stock Android M Preview 3 install that I have. I see multiple threads and how to guides but all the download links for custom kernels to accomplish this are down. Does anyone have an up-to-date link for this process?
Thanks!
EDIT: Planning to go with this kernel. http://forum.xda-developers.com/google-nexus-5/orig-development/kernel-elementalx-n5-0-44-t2519607
I'll post back with more details if it works out.
Turns out you have to flash a kernel first then flash the SuperSU package. I found this using Google
http://www.ibtimes.co.uk/how-root-n...id-m-build-mpa44g-developer-preview-3-1515927
One would hope but that ended up in a boot loop for me which led me to discover that we need a custom kernel on the system before flashing the SuperSU package.
I used wugfresh tool kit, no problems.
I'm using that too but when you use it to flash SuperSU, you get boot loops on Preview 3 because you need a custom kernel. Otherwise, yes it works wonders for rooting any other rom.
In fastboot, I installed stock kernel, and just after, less reboot, I installed elementalX and after supersu and it's good for me.
If you don't install elementalX and reboot just after stock kernel, it doesn't work.
This is what worked for me.

Sch-s968c gs3

I have my phone rooted. I just installed the twrp recovery, and cm 13 nightly. I was wondering what should I do exactly when and before I flash the ROM and also which GAPPS should I download the new ROM. This is my first time rooted, trying to go into recovery, and trying to flash. I just want to ask what all is need and what should I do to not brick my phone. Help would be greatly appreciated.

Why is my custom kernel being lost after flashing a new rom?

Hi all. I'm a bit of a noob who just really started digging into custom roms and rooting this month. A friend helped me root Lollipop when I first got this phone and I've been putting off updating to marshmallow for 6 months, but learned how over the past weekend and I'm loving it! Small problem, though, and I don't know if it's even a real one, but here it is. After all is said and done flashing the XstreStoLite 3.3.1 rom and Aroma add on pack, everything works fine, but the arter97 kernel is no longer listed as the active kernel, even though in XstreStoLite's settings when presented with the overwrite kernel option I always selected No. Is there a reason this is happening? Can I just reflash the kernel now, and is it safe to do so without brick in the phone? Does this rom or any other necessary apps/root features require the custom kernel? Thanks! This was my process in getting my phone up and running:
Factory reset
Flash stock 6.0.1 with Odin
Flash arter97 recovery with Odin
Recovery mode to flash arter97 kernel and superSU
Flash XstreStoLite in recovery, factory reset
Flash aroma addon
Additional random question I had: at what point, if any, should I be flashing the custom bootloader and modem, and does a factory reset/cache wipe delete those or is it one and done? Thank you!
The bootloader and modem flashing is needed if you want to move from 5.x lollipop to 6.x marshmallow.
If you are allready on 6.x there is no need.
If you lost your custom kernel you can reflash it in twrp and after wipe cache/dalvik cache.
If you flash the corect version of kernel the is no problem of softbrick.
Flash a 6.x kernel on a 6.x rom

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