serial hangs kernel
Danny Braniss
danny at cs.huji.ac.il
Tue May 24 23:59:15 PDT 2005
i've been having some boxes hang solid (only power cycle will work) when
trying to open ttyd0/cuaa0/cuad0.
the message
sio0: port may not be enabled
gave me the clue, notice that the above is ambivalent. I enabled it in the
bios,
and now it's working ok, at least on an IBM-R51, i still have to
check it on an IBM-T21 (that DOES have a serial port/outlet), and a
Intel/IBM blade.
so it seems, at first site, that if the sio hardware is on the MB, but
sort of not enabled - because there is no connector -, (why the parallel
port was kept and not the serial is beyond me), trying to open /dev/cuaa0 hangs
the kernel.
Q: in such case, shouldn't it not appear in /dev ?
btw, this is with -stable & -current
danny
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