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From: John Baldwin <jhb@freebsd.org>
To: freebsd-stable@freebsd.org
Subject: Re: IPMI serial console
Date: Thu, 21 Feb 2013 10:49:13 -0500
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On Thursday, February 21, 2013 5:45:13 am Daniel O'Connor wrote:
> Hi all,
> A recent thread inspired me to try getting a proper serial console working 
on a Supermicro X9SCL motherboard with IPMI.
> 
> However I find that while I see loader messages and the getty I enabled  
after boot I don't get any kernel messages which does somewhat limit the 
utility..
> 
> The BMC creates COM3 (/dev/cuau2) which works with getty. I modified 
/boot/loader.conf like so..
> boot_multicons="yes"
> boot_serial="YES"
> console="comconsole vidconsole"
> comconsole_speed="115200"
> # Disable console flags on these 2 ports
> hint.uart.0.flags="0x00"
> hint.uart.1.flags="0x00"
> # Set console flag
> hint.uart.2.flags="0x10"
> 
> Does anyone have any hints?

Rather than using all these hints, just use these three in loader.conf:

console="comconsole vidconsole"
console_speed=115200
console_port="0x<blah>"  (where <blah> is the correct I/O port for COM3, 0x3e8 
maybe?)

-- 
John Baldwin