ubuntu 系统，用nfs，结果板子能启动成功，也能进图形界面，但是minicom终端停在了
Uncompressing Linux.............................................................
................................................................................
...................... done, booting the kernel.
不能进入串口控制了，很不方便，请问是怎么回事？
param set linux_cmd_line "console=ttyttySAC0 root=/dev/nfs nfsroot=192.168.0.1:/home/xdcld/root_qtopia ip=192.168.0.77:192.168.0.1:192.168.0.1:255.255.255.0:sbc2440.arm9.net:eth0:off"
