I'm not sure how this is supposed to work, but exiting, shutdown or reboot in Kodi has the same effect (black screen, cannot wake up with keyboard but not really shutdown I guess because the sdcard access led is still blinking). I have to unplug/replug power source after these actions. I looked at the br-kodi script that seems to handle poweroff and reboot, but I could make it work properly. I'm running kodi as a non-root user (tried as root but it was the same). The system is a Raspberry Pi 3 with the buildroot master branch compiled (so Kodi 16). Does anyone know how to make it work ? I would like to get back to tty for example after an exit. PS: This is more an help request than a real bug I guess, so I hope it is OK to post it like this.
I was able to fix the reboot and shutdown. I'm still not able to exit kodi and return to tty but it seems to be a kodi issue more than a buildroot issue. That is why I'm closing this bug report. :)