Re: Machine reboot

[Auke Kok <auke-jan.h.kok@intel.com>]

Aleksey Gorelov wrote:
> Auke Kok <sofar@foo-projects.org> wrote:
> > Aleksey Gorelov wrote:
> > > > -----Original Message-----
> > > > From: linux-kernel-owner@vger.kernel.org 
> > > > [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Lukas 
> > > > Hejtmanek
> > > > Sent: Thursday, October 05, 2006 3:53 AM
> > > > To: linux-kernel@vger.kernel.org
> > > > Subject: Machine reboot
> > > >
> > > > Hello,
> > > >
> > > > I'm facing troubles with machine restart. While sysrq-b 
> > > > restarts machine, reboot
> > > > command does not. Using printk I found that kernel does not 
> > > > hang and issues
> > > > reset properly but BIOS does not initiate boot sequence. Is 
> > > > there something
> > > > I could do?
> > >   I have similar issue on Intel DG965WH board. Did you try to shutdown network interface and
> > > 'rmmod e1000' right before reboot ? In my case machine reboots fine after that.
> > >
> > > Aleks.
>>
> > interesting, do you do that because it specifically fixes a problem you have? if so, I'd 
> > like to know about it :)
> >
> > Auke
> I'm just trying to localize the issue. 
> Since right before machine stalls during reboot I see something like
>
> ACPI: PCI interrupt for device 000:00:19.0 disabled
> Restarting system.

that's quite a normal message, not sure why that would constitute a problem.

> 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'm afraid this is now common issue across Intel 965 board series, at least with their latest BIOS
> updates.

first time I've heard of it!

I'm unsure my BIOS version will be the same as it's a devel system for our drivers, but 
still I have never heard of anyone requiring the full unload of the NIC driver to be 
able to shutdown.

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?

Auke
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