Armin

Thanks @SteeMan and @root-stas for your great support (without forgotten @balbes150 for his great job on Armbian)
 
Today's news:
1. I have burnt the version Armbian_20.05.4_Arm-64_bionic_current_5.7.0-rc6_20200518.img on the SD card with Etcher
2.  Copy u-boot.sd to u-boot.ext (impossible to boot on the SD card without this)
3. Modify uEnv.txt to choose meson-g12a-x96-max-no-cvbs DTB file in amlogic section:
4.  Boot on the SD card (with toothpick method because impossible with android update method due to error like this)
5.  Define root password and create user session
6. Force the Ethernet speed to 100Mb
sudo ethtool –s [device_name] speed 100 duplex full autoneg on 7. Now, I can use putty from another device to be connected on the TV Box !!!! 
 
 
Next step is to copy this configuration on the eMMC. So, I'm waiting your instructions to be sure that I can use this method:
cd /boot sudo cp u-boot.ext u-boot.sd cd sudo /root/install-aml.sh  

Hello
 
The driver for rtl88x2 seems to be not compatible with armbian:  https://forum.armbian.com/topic/15376-methods-to-fix-x96-max-pluss905x3-gigabit-ethernet-problem/?tab=comments#comment-109815
 
So, this is necessary to wait !
 

Hello,
 
No error at this end of eMMC installation ?
 
Some answers here: https://forum.armbian.com/topic/12988-armbian-for-amlogic-s905x3/page/7/?tab=comments#comment-101887
 
Moreover, on my X96 (Air 4/32Gb version), the most efficient file is meson-sm1-sei610-ethfix.dtb (ethernet speed is fixed at 100Mb because 1000Mb doesn't work on this kind of box).
 
I suppose that your bootloader in eMMC is broken now and you need to reinstall the android firmware to get to a clean starting point. 
 
For that, you need the stock firmware of your box, USB cable Male<->Male and USB Burning Tool.
 
Good luck !

In case of USB, use this for the step 2:
If you are starting the system from an USB, you need to copy file  u-boot.usb to u-boot.ext
 
And Yes, only 100M for Ethernet

Already done: https://forum.armbian.com/topic/12988-armbian-for-amlogic-s905x3/page/7/?tab=comments#comment-101885
 
But the dtb was not correct (some issues with Ethernet) so, replace the step 3 with meson-sm1-sei610-ethfix.dtb (download and copy it into dtb/amlogic folder of the SD card) as indicated here: https://forum.armbian.com/topic/12988-armbian-for-amlogic-s905x3/page/8/?tab=comments#comment-101921
 
3. Modify uEnv.txt to choose meson-sm1-sei610-ethfix.dtb file in amlogic section:
 
And the ethernet speed is already fixed with meson-sm1-sei610-ethfix.dtb, therefore the step 6 is not needed.
 
Enjoy !

The sources need some adjustments to compile with 5.7.x most likely. Just be patient and hope that the creator makes these changes since  he knows his work the best.

I am sorry, I am now running Armbian from SD card, so I cannot show you the result of ifconfig.
Thank you anyway and I will try other dtb files.

Here, if I'm right !
 
But, for a 1st trial, the good way is to try the most recent version (link on the 1st page)