SuperMicro IPMI/SOL and ipmitool troubles

Dmitry Morozovsky marck at
Wed Nov 19 18:55:33 UTC 2014

On Wed, 19 Nov 2014, Paul Mather wrote:

[snip all previous]

> > More fun stuff:
> > On the supermicro machine it is not working to use comconsole_port, as it
> > seems to switch, "redirect after boot" I guess.
> > 
> > Specifying hw.uart.console="br:9600" works though, but how to specify that
> > via comconsole_port? (hint, do not put comconsole_port="" in loader.conf)
> In my experience it can be confusing to determine which COM port the server 
> is actually using for SOL.  On multiple different Supermicro servers, I've 
> found the BIOS differs as to how SOL is set up.  OFten, you can't explicitly 
> assign the COM port in the SOL setup.  I've also found it rare that the BIOS 
> is explicit as to which COM port is being used for SOL.  I've had servers 
> that use COM1, others that use COM2, and others that use COM3.  That makes 
> setting comconsole_port somewhat a process of trial and error, at least 
> that's what I've found...

I'm now as a thumbrule (well, no servers older tan, say, 6-8 years) use output 

grep uart /var/run/dmesg.boot

and, usually, IPMI/SOL is the last one from the output; also, you can use 
port/irq from there in corner cases

D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck at ]
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at ***

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