Date: Wed, 12 Jun 2002 20:42:32 -0400 From: Chad Leigh -- Shire.Net LLC <chad@shire.net> To: freebsd-questions@FreeBSD.ORG Cc: chad@shire.net Subject: help with serial ports as terminal lines Message-ID: <72582A9E-7E66-11D6-854A-0003931BED80@shire.net>
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Hi I am sitting at my machines. I have two machines, each with a Tyan Tiger MP MB (1 cpu) and pretty much identical kernels (4.5R-p6). Each sees its serial ports. Here is a dmesg -- it is identical for both host# dmesg | grep sio sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A, console sio1 at port 0x2f8-0x2ff irq 3 on isa0 sio1: type 16550A host# I have getty running on the console device and the kernel is set for sio0 at std.9600 If I stick a null modem cable between sio0 and sio1 on my first computer, it works fine and I can use minicom or kermit to log into the machine. Ie, log into itself going out its own sio1 into its own sio0 I do the same thing on my second computer and nothing happens. The first computer was a from scratch 4.5R install that was cvsup to -p6. The second (non working) machine was a 4.2R machine that I upgraded through cvsup to 4.5R-p4 and then -p6. I tried remaking the /dev special files but that did not help. The rc.serial script is identical on both machines. I would ideally like to cross link sio1 on each machine to the others sio0 console. When I do this, given the above, machine 1 (the one that works with itself) cannot see anything on machine 2 but I can still log in to machine 2, even though I see nothing (ie, nothing froim machine2 and no echoing of my typing). If I try from machine 2 I see all the console messages and the login prompt on machine 1, but I cannot type anything and cannot get any response on machine 1. Both have getty running on console (sio0) and I do not know where to start. I replaced the motherboards last night (for a totally different reason) but had the exact same problem on the previous sets of motherboards (Abit KG-7). I have read through the serial comms part of the handbook and have tried various things there too... thanks for any help. I need to get this working tonight if I can since I have to fly out of here and go home tomorrow early, so I have no hands on after tonight, and I would like to be able to administer the machines remotely if possible through the console. Thanks Chad To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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