linux-kernel - Re: Machine reboot

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Date:	Fri, 13 Oct 2006 07:36:01 -0700
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	Lukas Hejtmanek <xhejtman@...l.muni.cz>
CC:	Aleksey Gorelov <dared1st@...oo.com>, linux-kernel@...r.kernel.org,
	magnus.damm@...il.com, pavel@...e.cz
Subject: Re: Machine reboot

Lukas Hejtmanek wrote:
> On Thu, Oct 12, 2006 at 09:08:34PM -0700, Auke Kok wrote:
>>> and this device is Gb ethernet, e1000 is perfect candidate to look at. And 
>>> yes, removing e1000
>>> before reboot works around the issue.
>> Have you tried to only `ifconfig ethX down` ? my own i965 board shuts down 
>> perfectly fine without unloading the e1000 driver.
> 
> I can confirm that rmmod e1000 causes that machine can reboot gracefully.
> 
>> Would you be able to debug a failed shutdown perhaps and capture the 
>> console output? when exactly does it `stall` ? What other interrupts are 
>> assigned on your system? Did other BIOS versions work correctly?
> 
> Up to version 0864 it restarts normally. Any higher version causes hang on
> restart if e1000 driver is loaded.
> 
> I've tried to report it to Intel but they replied that Linux is unsupported on
> this board...
> 
> It's not an issue in the Linux kernel. Using various printk I can see that
> tripple fault or reset via KBD is issued and followed by hang of the BIOS. 
> 
> For i965 chipsets, the BIOS is *a lot* buggy :(

that's depressing, can you send me the output of `dmidecode` of the latest BIOS? Perhaps 
I can reproduce it myself with that version.

Auke
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