Solved Boot Loop After Factory Flash Build mdb08i in fastboot on my Nexus 5X

Hi guys,

I was getting boot loop every time I tried to factory flash mdb08i from https://developers.google.com/androi...s/images?hl=en on my Nexus 5X. I flashed this build more than 5 times and let the device run 20+ minutes during boot animation.

I generally used method 2 from Nexus 5 tutorial since that was the tutorial I used on my Nexus 5:

Code:

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fastboot flash bootloader C:\image-hammerhead-krt16m\bootloader.img
fastboot reboot-bootloader
fastboot flash radio C:\image-hammerhead-krt16m\radio.img
fastboot reboot-bootloader
fastboot flash system C:\image-hammerhead-krt16m\system.img
fastboot flash userdata C:\image-hammerhead-krt16m\userdata.img
(Note: this command will wipe your device (including \sdcard), EVEN if your bootloader is already unlocked.)
fastboot flash boot C:\image-hammerhead-krt16m\boot.img
fastboot flash recovery C:\image-hammerhead-krt16m\recovery.img
fastboot erase cache
fastboot flash cache C:\androidimage\cache.img

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However, the missing piece that solved my boot loop was to also run this command at the very end

Code:

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fastboot flash vendor vendor.img

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I normally have a batch script that runs all the commands for me.

How I found out about flashing vendor.img:
I found this issue only after I factory flashed mdb08i that I accidentally immediately flashed chainfire's modified mdb08i boot image for enabling root. After flashing chainfire's modified mdb08i, my Nexus 5X passed the boot animation but gave "Internal device error". So I looked up the error and found this thread: http://forum.xda-developers.com/nexu...xus-9-t3112827

I also tried other methods as mentioned in this thread but no luck with it on my end but perhaps will help others: http://forum.xda-developers.com/nexu...image-t2527382

Hope this help others who are also stuck on boot loop after flashing mdb08i on their Nexus 5X.