I’ve noticed some strange behaviour with USB in Wandboard Quad with kernel 4.15 / Ubuntu 18.04 armhf ( stock kernel from Ubuntu netboot install ).
The USB devices are detected/enumerated correctly with system start, but when disconnected later and connected once again are not recognized / enumerated anymore.
Also removal of ci_hdrc_imx module causes the system hard lock without any information printed in the console.
Tried with 4.15.0-29 4.15.0-33.
Did anybody notice such behaviour?