Problem printing to serial port with lpd

slipbull · October 30, 2009, 10:45am

Hi all,

I want to print to a printer connected to the serial port. So this is how I set up the /etc/printcap file:

imp1:
:lp=/dev/ser1:sd=/usr/spool/output/imp1:

But when I print with:

lpr -Pimp1 filetoprint

File gets spooled, but the settings of the serial port change! -Like parity checking gets set to “odd”, and baud rate to “13” (!). Even if I change the printcap file to look like this:

imp1:
:lp=/dev/ser1:br#9600:sd=/usr/spool/output/imp1:

Lpd keeps leaving /dev/ser1 in bad state. The spooled fiel print when I change the settings of the serial port correctly with:

stty baud=9600 par=none < /dev/ser1

Any clues on why is this happening? How to fix it?

Thank you!

Jose

juanplacco · October 30, 2009, 2:38pm

Did you try echo “Hi world” > /dev/ser1 ?

slipbull · October 30, 2009, 3:34pm

Yeah, that works. I mean, the serial port is ok until lpd tries to use it

slipbull · November 3, 2009, 8:25am

So, any more ideas???

juanplacco · November 5, 2009, 12:48am

Did you configure /etc/config/lpsrvr ?

slipbull · November 5, 2009, 7:59am

No, using only lpd because printers are serial.

slipbull · November 11, 2009, 2:40pm

It’s a bug in QNX:

openqnx.com/index.php?name=P … &view=next

davidk2 · January 5, 2010, 12:11pm

Yes this is a bug in QNX 6.3.2 and below.

It has been fixed in 6.4.0:

I had a qnx rep raise a PR for me: PR55791 (search for 55791 at qnx.com/developers/articles/ … ware_fixes).