板子是最近才买的Firefly-rk3288-Reload的板子，内核用的Android5.1中的kernel编译出来。按照版主的方法在电脑上制作的ubuntu16.04的系统。
启动后卡住不动了，请教是什么原因。
[ OK ] Started Getty on tty6.
[ OK ] Started getty on tty2-tty6 if dbus and logind are not available.
[ OK ] Started OpenBSD Secure Shell server.
[ TIME ] Timed out waiting for device dev-ttyS2.device.
[DEPEND] Dependency failed for Serial Getty on ttyS2.
[ OK ] Reached target Login Prompts.
[ OK ] Reached target Multi-User System.
[ OK ] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes…
[ OK ] Started Update UTMP about System Runlevel Changes.