kernel panic on Fedora 8 - a serious bug!

D. Hugh Redelmeier hugh at
Sat Feb 23 22:14:38 UTC 2008

| Date: Thu, 21 Feb 2008 13:17:09 +0100 (CET)

| title Fedora 8 (
|         root (hd0,0)
|         kernel /vmlinuz- ro root=/dev/md1 console=tty0
| console=ttyS0,115200
|         initrd /initrd-
| So the kernel is also pumping the information via the first com port.
| Start minicom at the other machine, select right setting for baudrate
| 115200 and voila. You will see output, even when it crashes.
| This is really then the only way to see if the kernel is really crashing
| at something. I have the luxery here to have console servers with buffers.
| So if a machine crashes, I can read the buffer of the output, and see what
| happened.

The kdump tool is also good for this.  It will give you a dump that
you can analyze with crash(8).  It does not require a serial port
(getting scarce these days).

The trouble is that this stuff is not well documented.  Not that many
people use it, so you can bump into problems.

  This is for FC6.  I don't know of a newer one.

crash(8) is always playing catch-up with the kernel releases.  The update
repositories don't seem to have new enough versions.  You are best off
getting a source RPM from the author's web site and building it.

I have posted a few messges to this list intended to help folks with
this tool.  Here are a couple:

More information about the users mailing list