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List:       freebsd-questions
Subject:    Re: Empty dmesg output
From:       Nicholas Killewald <captainspam () speakeasy ! net>
Date:       2006-09-30 2:20:53
Message-ID: 451DD485.8020802 () speakeasy ! net
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Dan Nelson wrote:
> In the last episode (Sep 29), Nicholas Killewald said:
>> Is there any situation in which dmesg should give no output whatsoever?
>>    Currently, my FreeBSD machine (RELEASE-6.0) isn't reporting anything
>> at all when I call up dmesg.  It has been on for quite some time, and to
>> the best of my knowledge there isn't much of interest it should have
>> reported recently.  It DID say something back at its initial bootup and
>> for some time thereafter, but nothing now.  Is this normal, or should I
>> be a bit concerned?
> 
> Things printed to the console (via syslog or writing to /dev/console)
> get logged to the dmesg buffer but aren't printed by the dmesg command.
> If you've had lots of console output all your kernel messages may have
> been pushed out.  Try running "dmesg -a" to see the raw buffer.  You
> can see the kernel bootup log at /var/run/dmesg.boot .
> 

Aha... that makes sense.  Yep, that was it, the console messages must've
flooded out any kernel messages.  Thanks!

-- 
Nicholas Killewald
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