I downloaded Armbian for a Udoo Quad from https://dl.armbian.com/udoo/Focal_current_desktop.
uname -a reports:
Linux udoo 5.6.18-imx6 #20.05.4 SMP Mon Jun 15 00:30:23 CEST 2020 armv7l armv7l armv7l GNU/Linux
However in https://docs.armbian.com/Hardware_Freescale-imx6/ I read: "Udoo Quad Kernel 3.14.x and 4.4.x with some hardware support, headers and some firmware included", which suggests that the image should have a 3.14 or 4.4 kernel.
In /var/log/Xorg.0.log I read:
[ 21.345] (II) AIGLX: Screen 0 is not DRI2 capable
[ 23.279] (II) IGLX: Loaded and initialized swras