thank you for your answer!
The examples are tried:
Working , but with Vivado 2017.4 and 2019.1, but no Vitis 2020.1 version available.
Embedded Vision Demo https://digilent.s3-us-west-2.amazonaws.com/resources/whitepapers/EmbeddedVisionDemo.pdf?_ga=2.93591453.1253467320.1595997339-1751738775.1593952945
Working , but with Vivado 2017.4 only. No 2020.1 version available.
Only very old Vivado 2017.4 available.
Binaries installable but not booting rootfs on SD-Card.
Not working in Ubuntu 20.04.
Xilinx Petalinux not working on Ubuntu 20.04.
Xilinx Petalinux Python version conflicts.
Xilinx Petalinux not installable as root with sudo to /opt.
Xilinx Petalinux not booting from SD-Card
Only available for Vivado 2017.4 with TCL Scripts..., Not working.
Further Examples I tried:
Zybo-Z7-20-DMA: Vivado 2018.4 not installed on my system (already 120 GB occupied by vivado tools), Vitis 2020.1 not available.
Vivado 2018.2 not installed on my system, Vitis 2020.1 not available.
Stable tree is 2018.2, I did not see the development tree for 2020.1, I will try that soon...
I think the Xilinx way with resource exhausting, obfuscating, and version-incompatible development tools,
especially the tcl scripts is too complicated and error-prone compared to Intel Quartus...
What I also don't like is that Petalinux is very far away from vanilla Linux and
not installable as root user like every other Linux program.
If you try to install Petalinux, It takes a long time before it gives up with errors.
Is there any support for using Vitis AI on the Zybo Z7-20 available?