Develop Bugs

Pixel2 XL Taimen Questions - Kernel and Boot Images / Slots

I was attempting to update the kernel on my pixel2 xl to use nathan's kernel with wireguard built-in.
My phone has an unlocked bootloader with the critical unlock as well. I am using the stock Google image from the December update.
I have the latest platform tools installed and verified with at the command line.
I downloaded and confirmed the MD5 sums of the boot and dtbo images, and then rebooted into the bootloader to apply them. After flashing them both successfully I rebooted from flashboot to hang on boot. I attempted multiple reflashes of the images without success.
I then attempted to reflash the previous boot and dtbo images again without success. After doing a bit of investigation I flashed the previous images over both slots a and b by using the --set-active fastboot command. This worked and I was able to get the phone boot successfully. I tried flashing nathans boot and dtbo images using the same method but without success.
Is this because of some mismatch between the ROM and kernel I'm trying to flash? Some of the issue?
Thanks

johnnythunder said:
I was attempting to update the kernel on my pixel2 xl to use nathan's kernel with wireguard built-in.
My phone has an unlocked bootloader with the critical unlock as well. I am using the stock Google image from the December update.
I have the latest platform tools installed and verified with at the command line.
I downloaded and confirmed the MD5 sums of the boot and dtbo images, and then rebooted into the bootloader to apply them. After flashing them both successfully I rebooted from flashboot to hang on boot. I attempted multiple reflashes of the images without success.
I then attempted to reflash the previous boot and dtbo images again without success. After doing a bit of investigation I flashed the previous images over both slots a and b by using the --set-active fastboot command. This worked and I was able to get the phone boot successfully. I tried flashing nathans boot and dtbo images using the same method but without success.
Is this because of some mismatch between the ROM and kernel I'm trying to flash? Some of the issue?
Thanks
Click to expand...
Click to collapse
Have you tried just flashing Nathan's kernel zip in twrp, followed by magisk? Or, do you not wish to root?

Latest nathan's would need you to be on january patch i guess,
CMIIW

So the trick is to be on the same release as the kernel or the device will hang during boot?

Badger50 said:
Have you tried just flashing Nathan's kernel zip in twrp, followed by magisk? Or, do you not wish to root?
Click to expand...
Click to collapse
I was not trying to root, simply to get an updated kernel with the wireguard kernel module installed, so no need for twrp or magisk right? Based on Nathan's kernel install posts I just need the platform tools and an unlocked bootloader, but I'm missing something.
Thanks

johnnythunder said:
So the trick is to be on the same release as the kernel or the device will hang during boot?
Click to expand...
Click to collapse
do you success now? i tried many times, same problem.

johnnythunder said:
So the trick is to be on the same release as the kernel or the device will hang during boot?
Click to expand...
Click to collapse
If it hang on G logo, you just need to force it to another reboot. And it will boot.
At least thats how it always been for me with nathan's kernel
But he indeed stated that due to the nature of pixel 2, mismatch rom and kernel version might work, partially work or not work at all.
So its best to match both

From Nathan's January release:
"Remember, you must be on the January update to use the boot image; the zip should work on December. Enjoy!"
You could always boot into TWRP via fastboot (that way TWRP doesn't stick) then flash Flash kernel.zip, and skip Magisk if you don't want root.
Why do you not want root? Magisk has been passing safety net for the last several versions.
I always flash the zip in TWRP, then magisk. If it hangs at the G, just reboot. The reboot has always cleared the hang the few times it has happened.

Not quite bricked my Honor View 10

Shortly after receiving my bootloader unlock code, I made a real mess. First, I tried to install TWRP via these instructions: https://twrp.me/huawei/huaweihonorview10.html
Specifically, I used the ADB/Fastboot method. Unfortunately, when I went to reboot to recovery by holding power+vol-up, it always took me to the Huawei eRecovery, not TWRP. I assumed the install failed after multiple attempts, and thought I would try to root with Magisk so I could use the TWRP app to flash the recovery instead.
I downloaded the ramdisk.img from here: https://drive.google.com/drive/folders/1kfNAjIwiMj8wpeDuJayiH2t-srYBBvN3
I found this link here: https://forum.xda-developers.com/honor-view-10/how-to/honor-source-program-t3732573
I then proceeded to patch it with Magisk and flashed the patched .img file. After doing this, the phone would bootloop a few times before ending up at the eRecovery again. I cannot get the eRecovery to get the packaged data for the Upgrade/Install recovery option, but when I choose the Factory Reset option, it reboots to TWRP (weird!) for about 3 seconds and then reboots to bootloader. I tried reflashing the original ramdisk.img when in the bootloader, but this made no noticeable difference.
My next guess is to try flashing recovery_ramdisk.img to try to remove TWRP and restore whatever stock image that was. I want some advice from the community first because I fear this may make things worse!
I saw that Magisk did in fact cause bootloops due to a compiler bug, according to this post: https://www.xda-developers.com/magisk-16-bootloop-crash-fix-huawei-honor-support/
Has anyone run into a similar issue? I assume since I can still get to the bootloader I can fix it, but I'm at a loss as to what the best next step is.

I flashed that recovery_ramdisk image. The result is that instead of booting to TWRP for a few seconds, it reboots into another eRecovery which allows me to do a factory reset and wipe the cache. After doing these, I still can't access the system.

So it turns out my device is BLK-104 and the problem was that I tried to flash files for BLK-109!
I'm surprised things worked as well as they did!

Anyone with Magisk install April update yet?

If so what version of Magisk, TRWP, etc did you use and was it successful or any snags along the way?
I plan on manually flashing the OTA when I get home tonight, just curious if any others have had success or failures.

I just flashed the full image (not OTA) without issues. Initially flashed Magisk v20.3 and then used MM to update to v20.4. Finally, used EX Kernel Manger to download / flash latest kernel.

I flashed the OTA, and installed Magisk 20.3, everything went smoothly

My updating procedure is flashing update image without -w then sideloading twrp & sideload flash kernel & magisk, but i have changed my laptop, idk if its something to be done on the laptop or in the phone, as i flashed april update but now when sideload flashing in twrp the pc wont send file to phone it just keeps blank & wont flash zip

Nightf0x_007 said:
My updating procedure is flashing update image without -w then sideloading twrp & sideload flash kernel & magisk, but i have changed my laptop, idk if its something to be done on the laptop or in the phone, as i flashed april update but now when sideload flashing in twrp the pc wont send file to phone it just keeps blank & wont flash zip
Click to expand...
Click to collapse
I find that the USB setting gets reset on reboot. I always have to tap to change the option again.

{GUIDE} - fix for being stuck at samsung boot screen due to rollback protection

Hi all I have been tinkering away and destrying my setup left right and centre to sort this process out but if you're unable to run the latest TWRP for your note from Ian and get stuck at SAMSUNG screen on boot then this process will fix that if followed correctly. This is due to the device's roll back protection.
This process will reset everything back to current date and get everything working on the new Oneui 2.1 base
Process for getting round SAMSUNG screen issue - please read through first and get the files you need before starting. I did this on my N976B but in theory it should work for other 10-range devices, notes indeed!
UNLESS YOUR RUNNING CRUEL KERNEL OR A SPIN OFF, YOU'LL NEED VOL UP AND POWER TO ACTIVATE MAGISK ON EACH BOOT
Needed:
Stock firnware
Magisk app
Twrp image
Pc and odin also patience and a brain lol
-Return to stock by flashing AP/BL/CP&CSC in odin
-Reboot and confirm oem unlocking greyed out, install magisk app and patch twrp image from Ian, also patch your ap file.
-reboot to download, meanwhile get the magisk_patched.tar and insert TWRP renamed as recovery.img in place of the stock patched recovery (keep this one for later)
-In download mode and with auto reboot off in odin, flash BL, Magisk_patched.tar(with the TWRP from Ian in), CP & HOMECSC.
-When flashing is complete exit download mode and immediately hold power and vol up and hold until on TWRP slider screen. swipe to allow modifications, format internal storage and flash multidisabler.
-Reboot TWRP and backup your current patched stock rom. FLASH THE STOCK PATCHED RECOVERY YOU SAVED EARLIER AND THEN FLASH MULTIDISABLER (THIS IS IMPORTANT AS YOU WILL THEN BE ABLE TO INSTALL TWRP VIA THE APP WITHOUT HAVING TO REFORMAT INTERNAL)
-Reboot straight to stock recovery (reboot from TWRP and hold Vol up and power until in stock recovery) and factory reset then reboot.
-You should now boot up as normal, setup your device, in particular have TWRP app and Magisk set up and running.
-Flash the Unpatched TWRP for your device in the TWRP app - reboot TWRP and check the box to kill that annoying swipe to allow modifications and then you are good to flash whatever rom or kernel you want for your device!

Flash the stock patch recovery as boot??

orbital_71 said:
Flash the stock patch recovery as boot??
Click to expand...
Click to collapse
yes then immediately flash multidisabler before you reboot to set up

i have just helped someone through this on TG so it defo works :good::good::good:

It can also confirm this is working. Just followed this guide on my Note 10+ (N975F with CTD1) and happy flashing now.

drexxie1962 said:
It can also confirm this is working. Just followed this guide on my Note 10+ and happy flashing now.
Click to expand...
Click to collapse
Excellent, thanks for testing!!!!!!!

@askmydas
you may find this useful - follow this to get your sec date reset then follow the process spelt out in the thread of the rom you want to use as you may need a different TWRP depending on what sec date the chef of your chosen rom uses.

Hey, when I get to " FLASH THE STOCK PATCHED RECOVERY YOU SAVED EARLIER" I try to do this and it tells me I don't have enough space. Any ideas?

KiwiNote+ said:
Hey, when I get to " FLASH THE STOCK PATCHED RECOVERY YOU SAVED EARLIER" I try to do this and it tells me I don't have enough space. Any ideas?
Click to expand...
Click to collapse
I worked it out, I was trying to install "recovery.img" to boot partition, "recovery.img" needs to be installed to RECOVERY partition. Silly me. Fixed it now, but have a new issue:
After I flash unpatched twrp image through the app, now my phone will only boot into TWRP. I don't even boot with recovery button presses, but it will still boot into TWRP only. Any ideas?

I know this is an old thread, but it may be that my solution could help someone who is locked on the outside of the device (softbrick)
TD,DR: If you have softbrick and you can't boot the device at all, try flashing via Odin the BL, CP, CSC from a stock rom and the AP of another completely different stock rom.
I had an IMEI 0000 issue on my Galaxy Note 8 (SM-N950F), using Hades Rom (custom), and I needed to install the stock rom. As I was on the F(15) binary, there were only two roms (SamMobile and Stockrom.net) available for my country (Brazil) with this binary:
N950FXXUFDUD6_N950FOXMFDUD6_ZTO
stockrom.net_N950FXXUFDUG5_N950FOXMFDUG4_ZTO
And a via Frija:
SM-N950F_1_20210717024140_0wmgsx8iwf_fac
And no Combination Rom for that binary
After flashing these roms several times, I was always stuck on the “Powered by Google” screen, even doing cache wipe and factory reset through stock recovery several times. So I flashed the N950FOXMFDUD6, flashed the CF-Auto-Root and was able to boot the device. Once inside I noticed that it didn't solve the problem of IMEI 0000. I tried a few more procedures, ended up restarting to install TWRP, and the OEM is closed!!! (OEM OFF, Prenormal). I start getting the message “only official binaries are allowed to be flashed(recovery)”. I flash the stock rom, but it gets stuck on “Powered by Google” again. I tryed to install CF-Auto-Root and I get the message “only official binaries…” I can't log into the device anymore. So after four days of desperation, trying every technique possible, trying to create the Combination Rom by unzipping the AP file from the stock Rom and modifying the files inside, without success, I finally try a procedure I haven't seen anywhere else: I go to the modified Odin: Odin3_v3.14.1_3B_PatcheD, I selected the BL, CP, CSC files from the N950FOXMFDUD6 rom and the AP file from the rom SM-N950F_1_20210717024140_0wmgsx8iwf_fac
And it worked! I can boot the device

Question Can't Root After May Update?

I was rooted with Magisk on the April build and attempted to update to May. So I used Magisk to uninstall, accepted the OTA, then used Magisk to reinstall (before rebooting) but I got an error about the phone being corrupt,. So I've spent the past several hours flashing the stock boot image to both boot slots, creating new Magisk patched images, flashing those to both boot slots, rebooting, and flashing stock boot images again to both boot slots. I've done every combination of flashing stock to one boot slot and patched to another, patched to both slots, and now stock to both slots. Any time I try to boot a patched boot image the phone reboots a few times and finally tells me it's corrupt and asks to reset it (which I haven't done and prefer not to do).
I can confirm that I'm on the May update and that I'm using the May boot image in my attempts to root again. At this point, I've wiped the Magisk app (thinking a module could be causing the issue when I root) and I'm back on the stock boot image and the phone seems to be working fine, just without root.
I feel like I'm missing something simple. Can someone point me in the right direction?

I stopped to update ROM with this method since march because i had always a bootloop.
Now i install the update by android flash tool and flash boot patched with fastboot command.
You could do it. I hope Twrp wil be released quickly.

Vincent_40 said:
I stopped to update ROM with this method since march because i had always a bootloop.
Now i install the update by android flash tool and flash boot patched with fastboot command.
You could do it. I hope Twrp wil be released quickly.
Click to expand...
Click to collapse
I successfully updated to May and I've flashed the patched boot image in fastboot at least a dozen times (stock to patched, different partitions, patched to stock). The phone won't boot whenever I flash the patched image. It just bootloops and eventually gives me an error about being corrupt and asks if I want to factory reset.

Flash your patched image, then boot to safe mode, then reboot. It should work. I had the same issue and it ended up being something I had in Magisk, even though I had everything disabled. I ended up uninstalling everything in Magisk, and reinstalling.

shiftr182 said:
Flash your patched image, then boot to safe mode, then reboot. It should work. I had the same issue and it ended up being something I had in Magisk, even though I had everything disabled. I ended up uninstalling everything in Magisk, and reinstalling.
Click to expand...
Click to collapse
And if this doesn't work you might have to wipe your phone and re-flash the appropriate build. I remember seeing posts in the past with users discussing a wipe and re-flash resolving the "phone is corrupt" issue.

shiftr182 said:
Flash your patched image, then boot to safe mode, then reboot. It should work. I had the same issue and it ended up being something I had in Magisk, even though I had everything disabled. I ended up uninstalling everything in Magisk, and reinstalling.
Click to expand...
Click to collapse
I wiped data in Magisk since I can't access the modules to disable them right now (no root) and I also wiped data in Rice Tweaks since it was one of the mods I was using. I'll try this tonight and see if it works.

joshw0000 said:
I wiped data in Magisk since I can't access the modules to disable them right now (no root) and I also wiped data in Rice Tweaks since it was one of the mods I was using. I'll try this tonight and see if it works.
Click to expand...
Click to collapse
Before you wipe everything try this:
** ALSO: booting into safe mode automatically disables all Magisk modules **
How I root and update (which is identical whether rooting the first time or updating):
Use the latest Magisk Stable (in my case, I keep the app "hidden" / renamed)
Used the full firmware zip, extracted to the same folder as the latest Platform Tools (S:\platform-tools)
Extracted the new boot.img
Copied new boot.img to the phone
Patched the new boot.img with Magisk Stable
Renamed Magisk'd boot.img so I know what version of firmware it's for
Copied the Magisk'd boot.img back to the computer
Disabled all my Magisk Modules
Removed the "-w " from the flash-all.bat
Re-edited the flash-all.bat to verify I saved it with the "-w " taken out
Open a Command Prompt, navigated to S:\platform-tools
adb reboot bootloader
flash-all.bat
Let phone boot, unlock it, check that it's working, allow the update process to finish (gave it five minutes or so)
adb reboot bootloader
fastboot flash boot kernel.img (renamed Magisk'd boot.img)
fastboot reboot
Unlock, check everything's working
Re-enabled the most basic Magisk Modules which I was sure wouldn't cause a critical issue
Reboot, unlock, made sure everything's working
Back to modding!
Click to expand...
Click to collapse
From here:
https://forum.xda-developers.com/t/...central-repository-of-relevant-links.4352027/

biTToe said:
Before you wipe everything try this:
** ALSO: booting into safe mode automatically disables all Magisk modules **
How I root and update (which is identical whether rooting the first time or updating):
From here:
https://forum.xda-developers.com/t/...central-repository-of-relevant-links.4352027/
Click to expand...
Click to collapse
Thanks. Do you know if I can run the flash-all.bat if I'm already on the current update? I have the full firmware on my PC (so I could get the boot image).
It sounds like booting to safe mode is the one thing I haven't tried.
When I updated last night I tried to disable Magisk from within the app but Magisk didn't have a backup (because I had rooted on the April build from fastboot) so I flashed the factory April boot.img, then fastboot boot magisk-boot.img, then allowed Magisk to root my phone. Then disabled all the modules, unrooted with Magisk, accepted the OTA which took unusually long to install (2+ hours), then used Magisk to restore root but I think I forgot to tell it to do the inactive partition which may have cause all of my issues. When I rebooted it gave me the corrupt error.
From there I spent a bunch of time fastboot flashing and fastboot booting the stock and modified May boot images. I've got about 4 copies of the modified boot image where I kept recreating it hoping it'd work again.
Tonight I'll try to flash the modified boot.img and boot directly into safe mode to see if I can get it to load. I may also try wiping cache in recovery to see if that helps.

joshw0000 said:
Thanks. Do you know if I can run the flash-all.bat if I'm already on the current update? I have the full firmware on my PC (so I could get the boot image).
Click to expand...
Click to collapse
YES you can.
Just make sure to edit the flash-all.bat and remove -w
otherwise you WILL wipe.
THEN... after you save the edited flash-all.bat, edit it again to make sure the -w is in fact not there.
Ive been where you are before. I forgot to disable a mod and boot-looped.
I booted to safe mode then re-flashed with flash-all, patched the boot.img and flashed that via Magisk and I was golden.
I always use this method. I even went from 12-beta to 12.1 w/o so much as a hiccup.
OTA can be problematic (or has been for me in the past). this is simple, quick, and works every time.
My suggestion is to start from scratch: delete all those previously used/attempted files -especially the patched image.
d/l the new factory image, extract/patch that boot.img This way you know everything is from the same place.
cheers

Thanks guys for all the help. Safe Mode is going to work for me. I was able to root, boot to safe mode, and reboot normal. I'm slowly enabling modules until it errors again and I've found that Renovate Ice was the culprit. But whenever it errors, I can just boot to safe mode, reboot, and start fresh with modules. Thanks!