Freebsd 9.0 release and dmesg

[Ivan Voras]

On 06/02/2012 18:24, JD wrote:
> dmesg no longer outputs the kernel messages.
>
> $ dmesg
> $
> $ which dmesg
> /sbin/dmesg
> $what /sbin/dmesg
> /sbin/dmesg:
>
> So, I have no idea what version of dmesg got installed.
>
> Anyone on 9.0 Release have this problem? How to fix it?

I thought this was by design, I've noticed it very early (7.x, probably 
earlier) and just thought that when lot of data is written to the 
console, the actual kernel message buffer gets invalidated or freed. 
This made me stop using dmesg altogether and just look at either 
/var/run/dmesg.boot for the boot messages or /var/log/messages.