Hello guys,
from a clean installation the plugdev group is missing.
Standard adb from android work out of the box. In the Recovery modus on my nexus 5x I can't make ota update without root.
Today I fixed it my self
getent group plugdev >/dev/null || groupadd -r plugdev
The udev rules
/etc/udev/rules.d/51-android.rules
must be include by hand. That's okay from my state.
Sincerely
Andy