Capturing All Kernel Messages

Capturing All Kernel Messages

[Brian D. McGrew]

So I'm trying to build a new special kernel and of course, as Murphy
says, it'll blow up the first 1,000 times!  I need to capture the boot
messages because I'm getting a lot of errors scrolling by before the
kernel panics and I'm toast and have to revert back to my old kernel.
Once I revert back to my old kernel, all my previous messages are lost
and dmesg does me no good! 

How can I make the kernel output to a file or some other means as soon
as it starts loading so I can capture this stuff?

TIA,

-brian

Brian D. McGrew { brian@visionpro.com || brian@doubledimension.com }
--
> Those of you who think you know it all,
  really annoy those of us who do! 

Re: Capturing All Kernel Messages

[Jesper Juhl]

On 1/12/06, Brian D. McGrew <brian@visionpro.com> wrote:
> So I'm trying to build a new special kernel and of course, as Murphy
> says, it'll blow up the first 1,000 times!  I need to capture the boot
> messages because I'm getting a lot of errors scrolling by before the
> kernel panics and I'm toast and have to revert back to my old kernel.
> Once I revert back to my old kernel, all my previous messages are lost
> and dmesg does me no good!
>
> How can I make the kernel output to a file or some other means as soon
> as it starts loading so I can capture this stuff?
>

serial console, net console or console on line printer.
Check the Documentation/ subdir in the kernel source for the details.

--
Jesper Juhl <jesper.juhl@gmail.com>
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