How to stop kernel rebooting during startup?

How to stop kernel rebooting during startup?

[Grant Coady]

Hi there,

Kernel has a problem mounting root, but it reboots before I can read 
the message.  Of course nothing gets logged so I cannot see exactly 
why the kernel wants to reboot.

Can I stop kernel doing an automatic reboot?  How?  

It's version 2.6.33.5, .4 has same behaviour.  Filesystem is Reiserfs, 
Intel ICH9R with Core2Duo, .config is on: 

  http://bugsplatter.id.au/kernel/boxen/pooh64/config-2.6.33.5a.gz

which worked fine on slackware64-13.0, has this behaviour on slack-
ware64-13.1.  Because I cannot read the screen before reboot, no idea 
where to look next, or what is actually happening.

Thanks,
Grant.

Re: How to stop kernel rebooting during startup?

[Bob Copeland]

On Wed, Jun 2, 2010 at 6:20 PM, Grant Coady <gcoady.lk@gmail.com> wrote:
> which worked fine on slackware64-13.0, has this behaviour on slack-
> ware64-13.1.  Because I cannot read the screen before reboot, no idea
> where to look next, or what is actually happening.

Maybe try CONFIG_BOOT_PRINTK_DELAY to see the message?

-- 
Bob Copeland %% www.bobcopeland.com

Re: How to stop kernel rebooting during startup?

[Randy Dunlap]

On Wed, 2 Jun 2010 18:35:45 -0400 Bob Copeland wrote:

> On Wed, Jun 2, 2010 at 6:20 PM, Grant Coady <gcoady.lk@gmail.com> wrote:
> > which worked fine on slackware64-13.0, has this behaviour on slack-
> > ware64-13.1.  Because I cannot read the screen before reboot, no idea
> > where to look next, or what is actually happening.
> 
> Maybe try CONFIG_BOOT_PRINTK_DELAY to see the message?

That's one option.

Can you alter the kernel command line (boot options)?
like add:  initcall_debug debug ignore_loglevel pause_on_oops=30


Sounds like it would also be good to have something like:
	reboot=hang|spin
(TBD)

---
~Randy
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