David A. Harding on 20 Sep 2008 13:59:02 -0700

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Re: [PLUG] Debugging looping reboots

On Sat, Sep 20, 2008 at 12:42:35PM -0400, K.S. Bhaskar wrote:
> Since my reading and reflexes are not as fast as the computer, any
> suggestions on how to troubleshoot this?

You can try freezing the output by pressing the scroll-lock key
or Ctrl-S.  Unfreeze the output, respectively, by pressing scroll-lock
again or Ctrl-Q.

Different things will happen depending on what facility is displaying
the output. If you're viewing kernel output directly, and you block
additional output by freezing the screen, you may get a non-recoverable
kernel oops[1]. The chance of a kernel oops increases the longer you
keep the screen frozen. If you get an oops, hard reboot the machine by
holding down the power button for 5-15 seconds. If you're viewing
multiplied syslog[2] output, freezing the screen won't prevent
additional errors from occurring, and the machine may reboot before you
see all the output.

	[1] http://en.wikipedia.org/wiki/Linux_kernel_oops
	[2] syslog(2) and syslog(3)

David A. Harding	    Website:  http://dtrt.org/
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