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 - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
