On Mon, Jul 05, 2010 at 09:16:14AM -0700, Mark Knecht wrote:
> I'm trying to capture the full boot log when booting from the Gentoo
> install CD but it seems the buffer isn't deep enough to get the whole
> thing. Is there by chance a command line option that will increase the
> depth of what's captured by dmesg so that I can get all the way back
> to the beginning?
pass the following parameter to the kernel on GRUB/LILO:
log_buf_len=n
where n is a power of two. By default it is 16384. You can change it
to 131072 (= 2^17) to get a much larger kernel log ring buffer. If you
put in something that is not a power of two, the kernel will ignore
the option.
You may also have to pass an additional parameter to dmesg to read the
early messages: look at 'man dmesg' and the -s flag.
Cheers,
W
--
Willie W. Wong ww...@math.princeton.edu
Data aequatione quotcunque fluentes quantitae involvente fluxiones invenire
et vice versa ~~~ I. Newton
