From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <38EE7EDE.612EB99F@denise.shiny.it> Date: Fri, 07 Apr 2000 20:35:42 -0400 From: Giuliano Pochini MIME-Version: 1.0 To: DeRobertis , linuxppc-dev@lists.linuxppc.org Subject: Re: stty crtscts < /dev/ttyS1 References: Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: > >> 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/