[Nexus 6P Q&A, Help & Troubleshooting] tr4nqui1i7y:
*TWRP #IRC*

Boot phone into TWRP, run these commands. You may have to flash factory images one more time if you get stuck at the splash screen (rather than looping)

Enter adb shell then copy and paste these two lines, separately.

dd if=/dev/zero of=/dev/block/platform/soc.0/f9824900.sdhci/by-name/modemst1 bs=16384

and

dd if=/dev/zero of=/dev/block/platform/soc.0/f9824900.sdhci/by-name/modemst2 bs=16384

This should fix bootloops for most. TWRP 3.2.1-1 causes a fatal error. The above shell commands should get 'most' running.

-----------------------------------------------------------------------

All methods below are MTC20F unless otherwise stated.

If you notice a method that worked, that I haven't listed please share with me with the source so I can have a full list.

Method 1

Followed instructions on flashing full firmware, found on g.co/ABH

Method 2

Followed instructions for OTA, found on g.co/ABH

Method 3

Followed [MENTION=4153349]Heisenberg[/MENTION] instructions in the HOWTO for manually flashing firmware via fastboot

Method 4

Flashed stock firmware, then wiped data/cache in stock recovery

Method 5

Flashed stock firmware, then wiped data/cache in TWRP 3.0.2-0

Method 6

Flashed stock firmware, then wiped data/cache in TWRP 3.0.2-1

Method 7

Flashed firmware via fastboot, then flashed full stock firmware through twrp (specify which version)

Method 8

Flashed firmware via fastboot, then flashed OTA firmware through twrp (specify which version)

Method 9

Utilized Wugs tool to flash full firmware

Method 10

Flashed firmware via fastboot, then sideload OTA via adb

Method 11

Flashed firmware, then flash your own TWRP backup

Method 12

[MENTION=4915202]Eric214[/MENTION] says

Advanced wipe - System, Data, Cache and Dalvik.

Flash vendor image MTC20F.

Flash PureNexus, Gapps, SuperSu 2.76.

Reboot.

Method 13

Factory reset, flash TWRP, resize and repair all partitions, flash stock again via fastboot

Method 14

Factory reset, flash TWRP, resize and repair all partitions, flash stock again via update.zip

Method 15

[MENTION=3024300]shiftr182[/MENTION] method

Fastboot firmware, flash twrp, repair and resize, flash nougat bootloader, flash nougat update from HERE

Method 16

[MENTION=5513075]neaznc021[/MENTION] method

"I'll note down the exact steps , most of which may or may not be relevant

1) Flashed MTC20F using TWRP 3.0.2-1

2) Booted into recovery and wiped everything and the partitions

- Add - Booted back into twrp 3.0.2-1 and then swiped to allow modifications

3) Then fastboot flashed TWRP 3.0.2-0

4) Restored my backup ( except recovery)

5) Still got stuck in the google screen.

Now the next parts are a bit weird

6) Booted into TWRP, flashed vendor.img from pure nexus rom

7) wiped everything except internal storage

8) Flashed vendor.img, pure nexus rom and gapps and then flashed vendor.img again

9) Rebooted and it worked"

Method 17

Fastboot stock, flash backup, flash MM ROM

Method 18

[MENTION=5266540]rbouza1[/MENTION] method

"Fastboot format user data partition

Run factory image

Fastboot bootloader radio vendor

Flash twrp

Try and boot if not flash stock rom /any mm rom boot into twrp and try a restore. Those were my steps and it worked"

Method 19

[MENTION=7689446]FragmentsOfLife[/MENTION] method

1. Flash a stock image (I used the August stock image MTC20F)

2. Fastboot flash TWRP 3.0.2-0

3. Boot into TWRP

4. Select Wipe -> Advanced Wipe -> Select and repair each partition individually (some won't be able to, and that's fine, just move on to the next one)

5. Restore a full nandroid backup (make sure everything is selected) and reboot

6. You should now be free of the never ending boots, and if your device is bootlooped at this point (stuck at the boot animation), you can just flash stock again.

Method 20 [MENTION=4004931]avivasaf[/MENTION]

"Got backup from my friend, you need this!

Format userdata

Flash twrp

Make any backup

Move the good backup to the file backup

Restore it

Flash any Mm rom(i flashed cm13)

Fastboot flash mm bootloader, radio, vendor

And you got it!!!!"

Method 21 [MENTION=6774530]Azhar05[/MENTION] method

flash developer preview 5 and flash latest twrp and then copy mtc 20f vendor image to twrp folder and then in twrp install image mtc 20f

Method 22

Let me know if you have more!