[lug] Serial Comm

[carl.wagner at level3.com]

I can see where that would take a while to figure out.
The magical moving serial port!

Sounds like some sort of Plug-and-Play gone wrong.
I would assume that one of the ports, the one labeled 'B' has
been disabled in the bios.

Also any changes to this box may break your config if things
revert back to not renaming your port.  Just something to keep
in mind if you go into setup, add/remove hardware or upgrade 
the kernel.

Carl.



"Timothy C. Klein" wrote:
> 
> No particular trouble with Minicom, it just seems to work against my
> intuition.  I did get it to work, it was not part of the problem at all.
> I have also been trying ckermit, which I seem to like so far.
> 
> As far as my ttyS0 problem, it is some hardware oddity.  I think I need
> to change something in the BIOS of this machine, but I don't feel like
> hooking the monitor back up.
> 
> This machine is a headless Pentium MMX 200 Mhz that will serve as my
> firewall.  I have got the serial console to work, but it required some
> strange tricks.  I have to tell LILO to use ttyS0 (serial=0,9600n8), for
> it to work.  But I have to give the kernel ttyS1
> (append=console=ttyS1,9600n8) for the kernel to work.  Both are working
> fine now, but it is odd that each one has to be told to use a different
> port.  The serial cable is plugged into the port labelled 'A' now, which
> I assume is ttyS0.  It does not work at all (for LILO or the kernel), on
> the port labelled 'B'.  The kernel does not find 2 serial ports on this
> machine.  I do recall seeing something in the BIOS about IRQs and
> serial/modem ports, but like I said, I am lazy and don't feel like
> hooking up a monitor again.  I have managed to coerce it into working
> now, and I don't need the other serial port anyway.
> 
> I had never done this before, so this really had me confused.  When I
> set up my second server (much newer machine, will be used as Web, email,
> DNS, etc. server), it worked exactly as I would have expected when I
> set up the serial console, on the first try.  Go Figure, I should have
> done that one first, so that I knew my methodology was correct.
> 
> Thanks,
> 
> Tim
> 
> * carl.wagner at level3.com (carl.wagner at level3.com) wrote:
> > What sort of problems with minicom?  I was having lots of
> > problems with it until I turned off hardware flow control.
> > (most of my cables are silver Staten with RJ45 ends
> > connected to modular-to-db connectors.)
> >
> > We have some linux boxes with no monitors  hooked to terminal
> > servers for console.  Don't know the exact config but if you
> > are still having problems I could get it.
> >
> > On your ttyS0 thing, I would not trust the labels. It may have
> > been a "Hangover Monday" when they put them on.  Or possibly
> > you have an internal modem?  If so, can you boot dos and use
> > something like procomm to find out what ports you have?  I would
> > make sure what is on what serial port since com1 and com3 share
> > an interrupt as well as com2 and com4 (ttyS0 and ttyS2,  ttyS1
> > and ttyS3 under Linux) and unintentional interrupt sharing of
> > serial ports has caused me a lot of problems.
> >
> > Carl.
> >
> > "Timothy C. Klein" wrote:
> > >
> > > Hello,
> > >
> > > Anyone out there use a good serial communication program?  I have
> > > minicon, and I just hate it.  For whatever reason, we just don't get
> > > along.  In Debian, I can't find much else beyond Seyon, and I don't
> > > always have X.  Is there anything else that anybody uses?  I am trying
> > > to set up a serial console from my firewall to my main machine, both
> > > running Debian, but to no avail.  In the past, half of my problems
> > > usually involve minicom.
> > >
> > > TIA,
> > > Tim
> > > --
> > > ==============================================
> > > == Timothy Klein || teece at silverklein.net   ==
> > > == ---------------------------------------- ==
> > > == "Hello, World" 17 Errors, 31 Warnings... ==
> > > ==============================================
> > _______________________________________________
> > Web Page:  http://lug.boulder.co.us
> > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> --
> ==============================================
> == Timothy Klein || teece at silverklein.net   ==
> == ---------------------------------------- ==
> == "Hello, World" 17 Errors, 31 Warnings... ==
> ==============================================
> _______________________________________________
> Web Page:  http://lug.boulder.co.us
> Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug