Enjoy your new N5X!
The Imgdata Tool mentioned earlier works flawlessly to customize your boot screens: http://forum.xda-developers.com/nexu...-tool-t3240052
You need to have a little knowledge of graphics but with Photoshop or Gimp it's just a matter of choosing your image and resizing (or making a text based image, or just a black image that will be a blank screen). Watch the file size as instructed. If you haven't done any advanced image manipulation, it's a great learning opportunity.
I guessed it (now I've read about that in another thread). And I already tried to flash the older bootloader, but then the device got into loop, then reflashed new bootloader and now it longs for 4' to be up and running.
I will reflash the whole firmware again
I've managed to turn off most of the warnings without replacing the images. I get a yellow warning that I have a different OS loaded and the it shows the key signature.
I relocked the bootloader and made a few changes to the rom:
I enabled verity on the system partition
I set the backuptools flag to false so that the updater-script won't backup or otherwise modify the system partition.
I adjusted the fstab.bullhead logic so that verity is used.
I also manually update the /etc/hosts file for ad blocking and I included open gapps pico in my source tree so that I don't have to install adaway or flash gapps, which would break system integrity.
Yes, it's the longer road to get rid of the red corruption message, but it's the more secure way to do it. I can update the recovery and vendor partitions by writing them directly with dd.
The next step would be to manually sign the vendor partition and enforce verity on it. I believe it is signed with google's keys, so I would resign it with my own to that it can be verified.
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