>
>AIX apparently ignores DTR until it goes multiuser, so it looked as
>though the console was working. However, every process which tried to
>write to the console (including the AFS "fileserver" process) blocked
>quite thoroughly when it couldn't write to the console!
>
>Perhaps there is a software solution. If so, I would use both.
This actually seems to be a software BUG.
DTR is one of those control signals that should float asserted, so
removing the plug should let output go through - and get lost.
This is why the normal ruse of testing if a parallel printer is on line -
write ten bytes or so, than wait an hour and interogate how many bytes
in the buffer, if more than 5 ask user to put printer on line - does not
work on serial printers. Thus if output blocks under hardware control
when there is no printer the line driver is broken.
Thomas
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