linux-kernel - Re: pci-express hotplug

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Date:	Tue, 13 Oct 2009 11:27:31 -0600
From:	Alex Chiang <achiang@...com>
To:	Jens Axboe <jens.axboe@...cle.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

* Jens Axboe <jens.axboe@...cle.com>:
> > > >> On Mon, Oct 12 2009, Greg KH wrote:
> > > >>> 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.)
> > > >>
> > > >> I should have mentioned that I tried that too. It doesn't
> > > >> complain, but I don't see my cards anywhere afterwards. I'm
> > > >> a hotplug newbie, do I need to do anything else?
> > 
> > Can you modprobe acpiphp with debug=1? And send the output?
> 
> acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
> acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:00:05.0
> acpiphp_glue: found ACPI PCI Hotplug slot 1 at PCI 0000:08:00
> acpiphp: Slot [1] registered
> acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:00:07.0
> acpiphp_glue: found ACPI PCI Hotplug slot 2 at PCI 0000:0b:00
> acpiphp: Slot [2] registered
> acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:80:07.0
> acpiphp_glue: found ACPI PCI Hotplug slot 6 at PCI 0000:84:00
> acpiphp: Slot [6] registered
> acpiphp_glue: found PCI-to-PCI bridge at PCI 0000:80:09.0
> acpiphp_glue: found ACPI PCI Hotplug slot 7 at PCI 0000:87:00
> acpiphp: Slot [7] registered
> acpiphp_glue: Bus 0000:87 has 1 slot
> acpiphp_glue: Bus 0000:84 has 1 slot
> acpiphp_glue: Bus 0000:0b has 1 slot
> acpiphp_glue: Bus 0000:08 has 1 slot
> acpiphp_glue: Total 4 slots

You mentioned in another mail that you echoed 1 into the various
slots' power files.

Did you do that after modprobing acpiphp with debug=1?

If so, there should be debug output when you try and turn them
on.

Also, quick dummy check, you are trying to power on populated
slots, right? :)

Can you send the output of lspci -vv? And I like the output of
lspci -vt as well... Both before and after loading acpiphp
please.

Thanks.

/ac

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