Date: Tue, 20 Jun 1995 17:43:46 UTC+0200 From: Javier Martin Rueda <jmrueda@diatel.upm.es> To: questions@freebsd.org Subject: frequent errors "tty-level buffer overflow" Message-ID: <733*/S=jmrueda/OU=diatel/O=upm/PRMD=iris/ADMD=mensatex/C=es/@MHS>
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I have a 486DX2-66 that is serving two printers: a PostScript connected
to the paralell port, and an HP LaserJet III connected to the serial
port at 9600 bps. The serial port has a 16450 UART.
Quite often I'm getting messages such as:
...
sio0: 961 more tty-level buffer overflows (total 103188)
sio0: 960 more tty-level buffer overflows (total 104148)
sio0: 960 more tty-level buffer overflows (total 105108)
...
And print jobs are output incorrectly, because chars seem to be lost. The
man page for sio(4) says that is a problem in the application.
At 19200 bps, things are worse, and almost any print job has errors.
My printcap entry for the printer is:
lj|hp|HPLaserJetIII:\
:br#9600:lp=/dev/cuaa0:mx#0:sh:\
:lf=/var/spool/lpd/ljlog:sd=/var/spool/output/lpd/lj:\
:af=/var/spool/lpd/ljacct:if=/usr/local/bin/contapcl:
If anybody has encountered and solved this problem, can you please tell
me how? Thanks in advance.
Note: although that is not the only activity of the machine, it is idle or
with a low load of work most of the time.
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