riwaha

I got a chance to look into this further. It looks like a patch for the overlay module will be needed, I found a commit that enabled mounting in user namespaces for overlay fstype in ubuntu-xenial , it is still used in ubuntu-bionic. I just tested it on 4.19.y branch and it fixes the issue. I have forked armbian/build, and have tested it in meson64-next, should I test it in -default and -dev as well, or should I send a PR with just meson64-next?

I am sorry, it's 5.75 stable Ubuntu 18.04.2 LTS 4.19.20-meson64, branch next. I won't be near it for a while, so I can't get the armbianmonitor -u unfortunately.

On an Odroid C2 and Le Potato, both running Armbian 5.75, Docker fails to run hello-world when inside an LXD container, reproducible by running the following commands results in an error /var/log/syslog shows Running the same commands on Ubuntu 18.04 x86_64 runs the Docker container inside LXD without error. I have tried searching, I have found that it used to not be supported if the LXD storage pool was XFS, in this case LXD storage pool is dir which works on x86_64, but not Armbian, I am thinking it is kernel config, but have not found what would be missing.