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From: rlk@ATHENA.MIT.EDU.UUCP
Newsgroups: comp.windows.x
Subject: Gnu-Emacs behavior revisited
Message-ID: <8704071952.AA27832@PRIAM.MIT.EDU>
Date: Tue, 7-Apr-87 14:52:04 EST
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Posted: Tue Apr  7 14:52:04 1987
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The operating system DOES affect the behavior because of bugs in
4.2BSD.  Specifically, SIGIO doesn't work properly on sockets, so
asynchronous I/O gets blown out of the water.

This isn't a problem if you start emacs from a remote machine,
assuming the remote machine is running 4.3 or 4.2 with fixed socket
code.  It also won't be a problem if you're running it inside an
xterm, because SIGIO works properly for terminals (see the fcntl(2)
man page for this nonsense).  However, an emacs started from a 4.2
machine with broken socket code will have these problems, as I know
from experience.

Robert^Z