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From: gyp@maadfa.ma.adfa.oz.au (Patrick Tang Guan Yaw)
Newsgroups: comp.sys.apollo
Subject: lpd - Xon/Xoff flow control
Message-ID: <1815@ccadfa.adfa.oz.au>
Date: 15 Aug 90 02:54:49 GMT
Sender: news@ccadfa.adfa.oz.au
Lines: 52

Ever since I started using lpd as the printer spooler
daemon on all our machines, I consistently encountered
the following problem.

Problem: XON/XOFF get turn off on the line that the
	printer is connected to (say /dev/sio1). ie,

		Host sync : FALSE
		Input Sync : FALSE

	even when I explicitly perform this in /etc/rc

		/com/tctl -line 1 -insync -sync  .....

	
My diagnostics:

	I don't think it is a printcap problem, as the line
	characteristics are OK straight after the reboot.
	The problem arises when the first job was queued by
	/usr/lib/lpd, subsequent jobs queued does not seem
	to alter these two settings. That is,

	1) Reboot machine (after clashed).
	2) tctl -line 1

		Host sync: True ,  Input Sync: True

	3) lpr /etc/printcap
	4) tctl -line 1

		Host sync: False ,  Input Sync: False
	
	5) tctl -line 1 -insync -sync
	6) lprm <job id>
	7) lpr /etc/printcap ; tctl -line 1

		Host sync: True ,  Input Sync: True

It is always the first job that is causing the problem.
Why? BTW the printer is a LaserWriter NTX II.

PS: The line in /etc/printcap that affect these are

	:fc#0000374:fs#0000003:xc#0:xs#0040040:

Thanks for the help in advance.
-------
Patrick Tang Guan Yaw,		Phone	 :	+61 6 268 8882
Dept. of Mathematics,	EMAIL-ARPA/CSNET :	gyp@maadfa.ma.adfa.oz.au
ADFA, Canberra, 2600.		UUCP	 :	..!uunet!munnari!maadfa.ma.adfa.oz!gyp
AUSTRALIA			ACSnet   :	gyp@ccadfa.cc.adfa.oz