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Date:	Sat, 05 Apr 2008 17:51:31 -0400
From:	Jeff Garzik <>
To:	Rich West <>
CC:	Wander Winkelhorst <>,,
	Linux IDE mailing list <>
Subject: Re: sata_via

Rich West wrote:
> I was only curious as to what turning off power management support would 
> buy with regard to the sata timeout issue.

ACPI is not only power management.  It is all the information your 
hardware conveys to your OS, about the setup and workings of your hardware.

Without ACPI, non-PM things like SMP, laptop dock/undock, and many other 
gadgets fail to function (or are configured sub-optimally).

ACPI sets up interrupt routing, and Linux history is _loaded_ with 
_years_ of problem reports that appear as timeouts, only to be resolved 
as ACPI interrupt bugs (aka BIOS bugs, since ACPI tables come from BIOS).


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