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Serial Printer / Postscript timeout

eddie_s
eddie_s asked
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Last Modified: 2013-12-15
I have an Apple LaserWriter IIf connected to my Linux 2.0.30 machine. The connection is on ttyS0. The problem is that after the printer completes the job, it seems to receive some more data from the computer and keeps flashing it's busy light. Eventually a timeout error page is printed. With the same cable the printer works perfectly with a different Win 95 machine. However, in Win 95 I have to specify that a ctrl-D be added before and after the job.

I want to use the Linux box as a print server. It is running Samba and I can print (albeit with the above problem) via Samba from Win 95. I have also tried printing to a file on Win 95 and dumping the file using cat file > /dev/ttyS0 with the same result. I did discover if I unplug the cable after the job finishes, I still get the timeout error but the printer goes into it's normal ready mode. I have tried many variations on the ttyS0 settings, including setting eof=<undef> from it's default of eof=^D. But it seems extra data is being sent to the printer after the job finishes.

Any clues?
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check your filter program defined in /etc/printcap. It should contain:

        printf "\004"


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Commented:
Let me add a little more detail. I have confirmed that the file that is being sent already has ^-D characters prepended and appended. Also, from the Win95 side, the only thing that is different between the direct connection and going through Samba is the port setting. I left everything else as it was.
Are the ^-D chars being stripped from the file and they have to be added back in with the filter?

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