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

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Message-ID: <c4e36d110807310727t6cf2c60pc83eabec0a207f2e@mail.gmail.com>
Date:	Thu, 31 Jul 2008 16:27:32 +0200
From:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
To:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: Sysrq+B doesn't work on my box

2008/7/31 Alexey Dobriyan <adobriyan@...il.com>:
> On Thu, Jul 31, 2008 at 03:45:24PM +0200, Zdenek Kabelac wrote:
>> Hi
>>
>> I'd like to get resolved this problem - my T61 machine doesn't reboot
>> with SysRQ+B key.
>> And I never remember if it was ever rebooting.
>>
>> This is all I know so far and I've no idea where could be the problem.
>>
>> System is running Fedora rawhide 64bit.
>>
>> If I press any other  SysRQ combination - it works - so things like
>> Sync, Umount, powerOff do work normally.
>> It's just Boot  which does not even get to the  __handle  routine
>> (I've added one extra simple debug prinkt
>> for this case)
>>
>> So - who/how/where could mask this key sequence from being delivered
>> to the sysrq driver?
>> (obviously I do not have any problems typing letter 'b' itself)
>>
>>
>>
>> Another issue is - that even with  'echo b >/proc/sysrq-triggers' my
>> machine doesn't reboot.
>
> Typo here? Do
>
>        /bin/echo b >/proc/sysrq-trigger
>
>

Really only a typo during mail writting - normally I use bash 'tab'
completion for this anyway.
(also - as I said - debug messages I've placed into
arch/x86/kernel/reboot.c are really printed - machine just doesn't
reboot for some reason)

Zdenek
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