Hi,everyone.<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; In l4/pkg/,there is a serial package about operate on serial port under L4/fiasco.But I couldn&#39;t run it propery on my machine.From adding some test sentence,I&nbsp; found the programme will dead in serial/lib/src/client.c 115 sentence:l4_ipc_wait(),but before dead,it could do two run in:l_recv&lt;---&gt;goto l_recv part.I mean the l4_ipc_wait() could get two message and do the relevant work,but when goto third run,it dead,and&nbsp; client&nbsp; invoking function&nbsp; also dead.I can&#39;t find what cause the this.<br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Is there anybody could help me?<br>&nbsp;&nbsp;&nbsp; <br>Best Regards!<br>ying ding<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>