Igor

Actually it is, but perhaps not well exposed in documentation:
 
./compile.sh 'compile_uboot'  

Try perhaps this: 
apt install slick-greeter + reboot.

https://www.armbian.com/bananapi-m3/
 
But there is no desktop variant for this hardware so you need to:
- download CLI and enable XFCE desktop via armbian-config -> system -> enable desktop
- build desktop image with https://github.com/armbian
- only Armbian. We don't provide Debian ...
 
And this board is not supported. Which means we don't know how good or bad it works ... I know it boots, but that's about it.

I highly suspect this is something to do with filesystem driver incompatibility between kernel 4.14.y and 5.4.y. We don't support BTRFS even commercially, but you can find commercial support elsewhere https://en.wikipedia.org/wiki/Btrfs#Commercial_support Perhaps there is a way to upgrade somehow ...
 
 
Plan B will only cost you your time. Starting from 4.14.y, coping elsewhere, starting with 5.4.y ... or staying on 4.14.y.

https://github.com/armbian/build/issues/2886

By opening a ticket https://armbian.atlassian.net/browse/AR-776 my job is done. I have other troubles to deal with.

Problem was fixed, but you need to apt upgrade and reboot.

We don't support 3rd party (commercial) projects you are using, sorry. This forum is dedicated to https://docs.armbian.com/User-Guide_Getting-Started/#how-to-check-download-authenticity under those terms https://github.com/armbian/build#support I am sure this doesn't matter to you, but it does to us. We already can't allocate enough resources to support our users, while we never had intention to support others or under some general terms.
 

It seems you are not (very long) a part of this community, otherwise you would know this forum is not a technical support service and we have a tool for reporting troubles. When you get rid of Dietpi overlay, start here https://www.armbian.com/bugs If this is a feature you are asking for https://forum.armbian.com/forum/38-feature-requests/ waiting time is measured in years.

It certainly works with their legacy (partially closed) stock SW / kernel interface, but for providing this function on a modern kernel, a complicated technical problem is waiting for you. Things has to be reverse engineered and port toward modern kernel base. Current status / more info here: https://linux-sunxi.org/AR100 and here.

Most of the stuff in modern mainline kernels has to be developed from scratch (or ported). Asus has nothing to do with that. Also we developed many enhancement and fixes for their private legacy kernel. You don't need, it's a waste of time, to deal with outdated & unsupported TinkerOS in any way.
 
But I can't tell if we will develop overlays for Rockchip armhf family or Tinkerboard specifically. We have to plan according to available resources. Which are very limited / expensive.

This "board not start" section only covers "Impossible cases - when official armbian builds from the download section doesn't start at all". Moving to Bug tracker section.
 
 
If you still have both kernels installed, this is certainly bad and possible source of troubles. Try recover this way https://docs.armbian.com/User-Guide_Recovery/ and remove one kernel, together with its dtb package.

Same imx6 processor but different core count (1,2,4), different marketing ( i think TV = 4x4 = i4PRO) and memory configurations.

Armbian is (probably) the the only distribution that doesn't use u-boot from 2015. All others are still using stock private Hardkernel boot loader ... We try to get rid of vendors dirty security hazardous code as soon as possible and problems as such is the price that we need to pay.
 
Currently we use u-boot based on 2020.xx, but it looks like it's possible that we need the one from 2021 as this is the case with C2. Some eMMC needs this. Mine obviously don't since it works without any intervention.
Try this image:
https://users.armbian.com/igorp/images/Armbian_21.02.0-trunk_Odroidc4_focal_current_5.10.12.img.xz

@q4a
 
Fixed with https://github.com/armbian/build/pull/2559 If you build image from sources, it will work as it should. I will fix affected images later on.

I already explained in my 1st reply. copy https://github.com/armbian/build/blob/master/packages/bsp/common/usr/lib/armbian/armbian-firstlogin#L297-L304 exchange $realusername with your username and paste.

https://www.armbian.com/bugs/
For now or when / if we come out with own solution.

Usual way: apt update ; apt upgrade
 
Update was pushed up a day ago but perhaps not all mirrors are in sync yet. Waiting or manual hacking https://imola.armbian.com/apt/pool/main/l/linux-5.10.4-sunxi64/

First you need to tell us filename of that image so we can verify.
 
Also there is an archive in the bottom of the download pages - checking previous build is also one of the options. This was added on last minute:
https://github.com/armbian/build/commit/ab9faf847affd34cd8c0a1e867e93c2edbb5f8e8

Thank you - you save others  I didn't spot this problem ... fixed. I guess I'll need to expand my test rig with a few more boards.

https://github.com/armbian/build/commit/53bc9e481a6be1e76d13df1f3abca599dc305447

I assume its this problem, but since I have no hardware to test, someone will need to build from sources to confirm:
https://github.com/armbian/build/commit/535650da96bb585a7dad47237f283a780189f0fb

Sorry, this way:
 
apt install linux-buster-root-current-orangepi3  

"Board doesn't start" is reserved for clean builds only. If your system failed for random reason ...
 
For recovery - check https://docs.armbian.com/User-Guide_Recovery/ 

We had wrong links, sorry. fixed now.

Yes. It was related. Fixed.

It should be fixed now.