linux-kernel - Re: Sysrq+B doesn't work on my box

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Message-ID: <c4e36d110808011325q612d57dcnfe99e6ef42b1c4ae@mail.gmail.com>
Date:	Fri, 1 Aug 2008 22:25:19 +0200
From:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
To:	"Alistair John Strachan" <alistair@...zero.co.uk>
Cc:	"Jeremy Fitzhardinge" <jeremy@...p.org>,
	"Henrique de Moraes Holschuh" <hmh@....eng.br>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: Sysrq+B doesn't work on my box

2008/8/1 Zdenek Kabelac <zdenek.kabelac@...il.com>:
> 2008/8/1 Alistair John Strachan <alistair@...zero.co.uk>:
>> On Friday 01 August 2008 10:54:19 Zdenek Kabelac wrote:
>>> 2008/7/31 Jeremy Fitzhardinge <jeremy@...p.org>:
>>> > Zdenek Kabelac wrote:
>>> I'll probably try to bisect  rc.sysinit script to check what is the
>>> first command
>>> that breaks the reboot  - but if there is any idea what should I test
>>> first.?
>>
>> Are you using modules? Maybe a driver is loaded and this upsets the BIOS
>> somehow? If that was the case, the driver wouldn't be loaded in an
>> init=/bin/sh situation, as you described before.
>>
>
>
> Yes - except as I've checked the exactly same modularized kernel
> running Debian on the same box
> has no boot problem.

Ok - idea with checking loaded modules was actually the right way to a
very quick discovery that KVM loaded in my Fedora are the source of
troubles - without them the second mystery is also a history :)

So - is it normal, that loaded KVM modules eliminate emergency reboot
(bug or feature)?

Zdenek
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