Re: [PATCH V2] Change ACPI IPMI support to "default y"

[Matthew Garrett]

On Wed, 2014-02-19 at 00:26 +0100, Rafael J. Wysocki wrote:
> On Tuesday, February 18, 2014 11:28:29 AM Matthew Garrett wrote:
> > 
> > The ACPI IPMI driver implements IPMI operation region support for the ACPI
> > core. Systems that declare ACPI operation regions may reference them at any
> > time, including during kernel initialisation. These accesses will fail
> > unless the ACPI IPMI driver is present, and undesirable system behaviour
> > may result. Set the default to Y in order to encourage distributions and
> > users to configure kernels to avoid awkward surprises.
> 
> Do you have any examples of problems caused by that or is this just theoretical
> at the moment?

For example, if you load the ACPI power meter driver before you've
installed the ACPI IPMI driver you'll typically get failures (most
vendors implement it via IPMI).

-- 
Matthew Garrett <matthew.garrett@xxxxxxxxxx>