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From: Antti Louko <alo@iki.fi>
Newsgroups: comp.lang.postscript
Subject: HP OfficeJet Pro X476DW missing standard output or feedback stream
Date: Sat, 07 Jun 2014 20:03:19 +0300
Organization: A noiseless patient Spider
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I just got HP OfficeJet Pro X476DW.  Postscript seems to be quite OK
after some basic testing.  Printer is fast and scanner has working
autofeeder with duplex support.

However, on Postscript side, any operators which are supposed to print
back using print, ==, pstack etc. operators, produce no data back to the
TCP channel.  I used the normal "telnet printer-IP-address 9100" way to
connect.

Does anyone know more about this?  Is it common to disable the feedback
channel totally.  I have some scripts which have used this in the past.