From: Giuliano Pochini <pochini@denise.shiny.it>
To: DeRobertis <derobert@erols.com>, linuxppc-dev@lists.linuxppc.org
Subject: Re: stty crtscts < /dev/ttyS1
Date: Fri, 07 Apr 2000 20:35:42 -0400 [thread overview]
Message-ID: <38EE7EDE.612EB99F@denise.shiny.it> (raw)
In-Reply-To: l03130304b50c8e1b783f@[216.164.131.253]
> >> Hardware flow control is broken. The command in the subject line (stty
> >> crtscts < /dev/ttyS1) freezes linux 2.2.14. Any idea why?
> >
> >Try this syntax: "stty -F /dev/ttyS1 crtscts". There's a comment in the
> >info doc for stty that letting the shell open the device may block in
> >certain situations.
>
> Does not help -- still freezes.
>
> By freezes I mean that the kernel dies. It no longer responds to
> keypresses. It no longer runs processes. All that I can do is hit reset.
What is connected to the serial port ? When I enable RTS/CTS on ttyS1
and there is my Epson 740 attached, the whole system freezed. I don't
know why this happen exactly. It seems that the printer changes continuosly
with very high frequency the state of CTS, which cause the serial driver
to loop indefinitely. When I detach the cable, Linux awakes. It also happens
with BeOS, but not under MacOS.
RTS/CTS works fine when I connect the serial port to the modem or to
another computer.
Bye.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-04-08 0:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-20 22:28 limited range of data error Rhys
2000-03-20 23:12 ` Gabriel Paubert
2000-03-21 1:54 ` David A. Gatwood
2000-03-21 2:22 ` Gabriel Paubert
2000-03-21 19:48 ` stty crtscts < /dev/ttyS1 DeRobertis
2000-03-22 16:05 ` Matt Haffner
[not found] ` <l03130300b4ff357b23e8@[216.164.129.33]>
2000-03-23 11:17 ` stty crtscts < /dev/ttyS1 [603ev] ce
2000-03-25 6:06 ` DeRobertis
2000-03-23 13:34 ` communicate with peripherics ? Franck Chionna
[not found] ` <l03130304b50c8e1b783f@[216.164.131.253]>
2000-04-08 0:35 ` Giuliano Pochini [this message]
2000-04-08 4:05 ` stty crtscts < /dev/ttyS1 DeRobertis
2000-04-08 17:08 ` Greg Noel
2000-04-09 0:02 ` Giuliano Pochini
2000-04-09 17:42 ` DeRobertis
2000-04-09 0:20 ` Giuliano Pochini
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