Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!munnari.oz.au!murtoa.cs.mu.oz.au!murdu!pal
From: pal@murdu.oz (Philip Leverton)
Newsgroups: comp.unix.ultrix
Subject: DS3100 & ttyline plotter hang problem
Message-ID: <1774@murdu.oz>
Date: 28 Nov 89 05:18:56 GMT
Organization: University Computing Services, University of Melbourne
Lines: 21

A user in a department here has a DS3100 running Ultrix 3.0 with 16Mb 
of memory. A Roland DXY1300 plotter is attached to the DS3100 via a serial
line (defined in /etc/ttys). The problem they are experiencing is that the
DS3100 hangs if, when sending a plot to the Roland, activity like opening
another window is performed on the DS3100. If no such action is done, then
the plot will be completed successfully, although the DS3100 is then
unavailable for serious use (otherwise the hang will most likely result).
The Roland has a 1 Mbyte buffer apparently, and when rebooting the DS3100,
the plotter again proceeds to draw some stuff (from its internal buffer?)
I'm thinking that it could be a control problem on the serial line.
(it is defined as 'nomodem' in /etc/ttys).

Has anyone met anything like this and have any suggestions?

(I know they should go to Ultrix 3.1 as soon as possible)

thanks

Philip Leverton
University Computing Services, University of Melbourne
pal@murdu.ucs.unimelb.edu.au