linux-kernel - Re: pci-express hotplug

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Message-ID: <20091029085755.GB10727@kernel.dk>
Date:	Thu, 29 Oct 2009 09:57:55 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Alex Chiang <achiang@...com>
Cc:	Mark Lord <lkml@....ca>, Greg KH <greg@...ah.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	jbarnes@...tuousgeek.org, linux-pci@...r.kernel.org
Subject: Re: pci-express hotplug

On Wed, Oct 28 2009, Alex Chiang wrote:
> * Jens Axboe <jens.axboe@...cle.com>:
> > 
> > acpiphp: enable_slot - physical_slot = 1
> > power_on_slot
> >   no _PS0
> >   no _PS0
> >   no _PS0
> >   no _PS0
> >   no _PS0
> >   no _PS0
> >   no _PS0
> >   no _PS0
> 
> One final thought -- your DSDT doesn't provide any power methods
> such as _PS[0-3] (I grepped your DSDT so basing my statement on
> more than just the output above), and without those, I'm pretty
> sure that there's no way for the OS to communicate to the BIOS
> that we want to power those slots on.
> 
> So, something funky is going on with your BIOS. This isn't some
> weird proto board or something, is it? ;)

It's pre-production, but not a prototype. I'll take it up with the
vendor.

-- 
Jens Axboe

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