Date: Mon, 12 Oct 2009 07:52:54 -0700
From: Greg KH <greg@kroah.com>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>, jbarnes@virtuousgeek.org,
       linux-pci@vger.kernel.org
Subject: Re: pci-express hotplug
Message-ID: <20091012145254.GA1517@kroah.com>
References: <20091012120620.GG9228@kernel.dk>
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On Mon, Oct 12, 2009 at 02:06:20PM +0200, Jens Axboe wrote:
> Hi,
> 
> I'm trying to get pci-express hotplug working in a box here. I don't
> really care about the hotplug aspect, I just want the darn pci-e slots
> that are designated hotplug slots to actually WORK. When I load pciehp,
> I get:
> 
> Firmware did not grant requested _OSC control
> Firmware did not grant requested _OSC control
> Firmware did not grant requested _OSC control
> Firmware did not grant requested _OSC control
> pciehp 0000:00:05.0:pcie04: HPC vendor_id 8086 device_id 340c ss_vid 0 ss_did 0
> pciehp 0000:00:05.0:pcie04: service driver pciehp loaded
> Firmware did not grant requested _OSC control
> pciehp 0000:00:07.0:pcie04: HPC vendor_id 8086 device_id 340e ss_vid 0 ss_did 0
> pciehp 0000:00:07.0:pcie04: service driver pciehp loaded
> Firmware did not grant requested _OSC control
> pciehp 0000:80:07.0:pcie04: HPC vendor_id 8086 device_id 340e ss_vid 0 ss_did 0
> pciehp 0000:80:07.0:pcie04: service driver pciehp loaded
> pciehp 0000:80:09.0:pcie04: HPC vendor_id 8086 device_id 3410 ss_vid 0 ss_did 0
> pciehp 0000:80:09.0:pcie04: service driver pciehp loaded
> pciehp: PCI Express Hot Plug Controller Driver version: 0.4
> 
> and the devices in the hotplug slots stay off. Is this an ACPI/bios
> issue? How can I debug this?

Can you try the acpiphp driver instead?  That's usually the driver you
want to use for "modern" systems (i.e. anything made in the past 5
years.)

thanks,

greg k-h
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