Devices plugged into the OTG-USB port on my Lime2 board aren't showing up at all.
I'm using a daily image of Debian u-boot and stable Debian 9.3... everything else seems to work fine.
Report it to whoever built your Debian / provided the files.
It looks not to be the Olimex hardware :)
John
This is entirely possible when using newest software releases. If you need to use mainline kernel I recommend you to test with Armbian Debian server images for the board here: https://www.armbian.com/olimex-lime-2/
If you wish to have all the hardware working, and mainline kernel is not mandatory, consider our official images available at the wiki article: https://www.olimex.com/wiki/A20-OLinuXino-LIME2
I tried the official images and armbian and I got it to work in both, thank you.