[RndTbl] Need help with serial connection

Kevin McGregor kevin.a.mcgregor at gmail.com
Fri May 27 14:21:37 CDT 2011

Do I have the wrong cable? I think it's one of those ones used to attach to
Cisco equipment, 9-pin RS-232 to RJ-45.

I had it working, briefly, but it stopped again. I think it had booted from
the CD, and was pouring out messages about a buffer overflow plus a
language-selection menu (repeatedly) as fast as 9600 bps would allow. Then I
removed the CD and rebooted and now nothing. With a Sun Fire, shouldn't I be
able to turn the front-panel switch to "Normal" and press the power button?
I did that, and I'm getting nothing on the serial interface. I should be
getting POST messages at least.

On Fri, May 27, 2011 at 10:43 AM, Adam Thompson <athompso at athompso.net>wrote:

> Turn off hardware flow control (RTS/CTS or DTS/DSR) and use software flow
> control (XON/XOFF) instead.
> Also, if you don't want to use minicom, (the modem AT initialization is a
> pain to turn off completely) just use screen instead:
> "screen /dev ttys0 9600"
> -Adam
> Kevin McGregor <kevin.a.mcgregor at gmail.com> wrote:
> >This is driving me nuts, since it was working and now it isn't and I have
> no
> >idea what has changed. I hope someone can help.
> >
> >I have a SunFire V490 at work. I also have a HP ProLiant server in the
> same
> >rack, which is running Ubuntu Server 10.04. I've got the weird cyan serial
> >cable plugged in to the lone serial port on the ProLiant and the other end
> >plugged into the V490 port ("SERIAL"). I've got minicom running on the
> Linux
> >box configured for 9600, 8N1 on /dev/ttyS0. minicom's status line reports
> >"OFFLINE", and I get no response to any keyboard input.
> >
> >What's wrong? I can freely power off/on the SunFire and anything else I
> want
> >to do with it. I have the keys for the front panel, too. Do I have to
> switch
> >it to diagnostics mode or something? We had it working before, and it was
> >quite easy.
> >
> >Help!
> >
> >Kevin
> >
> >_______________________________________________
> >Roundtable mailing list
> >Roundtable at muug.mb.ca
> >http://www.muug.mb.ca/mailman/listinfo/roundtable
> _______________________________________________
> Roundtable mailing list
> Roundtable at muug.mb.ca
> http://www.muug.mb.ca/mailman/listinfo/roundtable
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.muug.mb.ca/pipermail/roundtable/attachments/20110527/a536dd3d/attachment.html 

More information about the Roundtable mailing list