/dev/cuad0: Device busy

Ganbold ganbold at micom.mng.net
Mon Feb 4 05:31:19 UTC 2008


I'm trying to use serial port but the system says device busy.

daemon# cu -l /dev/cuad0 -s 9600
/dev/cuad0: Device busy
link down

daemon# uname -an
FreeBSD daemon.micom.mng.net 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #0: 
Mon Jan 14 16:49:57 ULAT 2008     
tsgan at daemon.micom.mng.net:/usr/obj/usr/src/sys/GDAEMON  i386

It seems like no other program is using serial port.
How to check whether something is using serial port?
Any idea?



If you think the problem is bad now, just wait until we've solved it. -- 
Arthur Kasspe

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