On Thu, 2007-09-13 at 23:21 -0400, Jeff Garzik wrote: > Shaohua Li wrote: > > ACPI spec (ver 3.0a, p289) requires IDE power on/off executes ACPI _PSx > > methods. As recently most PATA drivers use libata, this patch adds _PSx > > method support in libata. ACPI spec doesn't mention if SATA requires the > > same _PSx method, but executing _PSx for SATA should be ok I think. > > > > Signed-off-by: Shaohua Li <[EMAIL PROTECTED]> > > Where/how can a need for this change be produced? I run suspend/resume test in a Thinkpad R40 laptop, which implements _PSx method in IDE devices. But I'd say I didn't see visible difference in the suspend/resume circle w/wo the patch in the test laptop. This is just to make Linux match with ACPI spec. Maybe this changes other laptops.
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