On Tue, 2007-08-07 at 15:41 +0900, Tejun Heo wrote:
> Robert Hancock wrote:
> > Tejun Heo wrote:
> >> Michael Sedkowski wrote:
> >>>> Hmmm... If the problem only shows up on nx6325, it might be that
> >>>> ACPI is
> >>>> pulling unnecessary stunt. Please apply the attached patch and report
> >>>> when the disk spins down and up.
> >>> Disk spins down on "Pre-shutdown prepare" and then goes up and down on
> >>> "Power down".
> >>
> >> Oh... crap, so acpi wants to sync cache on shutdown. I wonder whether
> >> it spins down the disk correctly. Does emergency unload count increase
> >> after each power down? Also, please post the result of 'dmidecode'.
> >
> > I know that my Compaq X1000-series laptop does do some kind of ACPI
> > games with the disk on ACPI power off (I assume it is putting the disk
> > in standby before power-off at least). It also does this if you boot
> > into DOS, GRUB, etc. and then hit the power button. Could be if the disk
> > is dumb enough to spin up for sync cache and standby when there is
> > nothing to flush, and the kernel does its own standby, this could cause
> > an extra spinup/down..
>
> Yeah, that seems to be what's going on. I don't think we have any other
> choice than blacklisting those notebooks. This is a mess. How does the
> other OS cope with this?
>
> I'm thinking about using DMI vendor/product match to detect the affected
> systems but I think it would be better to match the ACPI implementation
> directly. Is there a way to match specific ACPI implementation?
I opened a new bug to collect dmi and acpidump outputs:
http://bugzilla.kernel.org/show_bug.cgi?id=8855
Thought this is the easiest way to get this all a bit together.
Would be great if you tell all affected people and let them attach
dmidecode and acpidump output there...
Thanks,
Thomas
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