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Date:      Wed, 08 Apr 2009 11:38:11 +0300
From:      Alexander Motin <mav@FreeBSD.org>
To:        Robert Noland <rnoland@FreeBSD.org>
Cc:        Diego Depaoli <trebestie@gmail.com>, freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: AMD 780G chipset major issues 2/3 (snd_hda)
Message-ID:  <49DC6273.1040907@FreeBSD.org>
In-Reply-To: <1239142508.1947.26.camel@balrog.2hip.net>
References:  <1239063789.00097214.1239052203@10.7.7.3>	 <1239063790.00097218.1239052203@10.7.7.3>	 <1239063792.00097228.1239052802@10.7.7.3> <49DBBE59.2080801@mavhome.dp.ua> <1239142508.1947.26.camel@balrog.2hip.net>

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Robert Noland wrote:
> On Tue, 2009-04-07 at 23:58 +0300, Alexander Motin wrote:
>> Diego Depaoli wrote:
>>> On Mon, Apr 6, 2009 at 11:06 PM, Paul B. Mahol <onemda@gmail.com> wrote:
>>>> Because pcm0 switched position with pcm1 :-)
>>> Already noticed.
>>> Do you know why?
>> It is really interesting question, but probably to the PCI guys.
> 
> I think it is due to bus enumeration... the first one found (i.e. lower
> bus id) becomes pcm0.  If I plug in the radeon HD 3850 which has hdmi
> audio, it ends up being pcm0, instead of my rear ports.  I also have a
> seperate codec for front ports, which is a bit of a pain, but...

I understand this, I am surprised that attach orders on boot and later
are different:

on boot:
hdac0: <ATI RS780 High Definition Audio Controller> mem
0xfeae8000-0xfeaebfff irq 19 at device 5.1 on pci1
hdac1: <ATI SB600 High Definition Audio Controller> mem
0xfe8f4000-0xfe8f7fff irq 16 at device 20.2 on pci0

later:
hdac0: <ATI SB600 High Definition Audio Controller> mem
0xfe8f4000-0xfe8f7fff irq 16 at device 20.2 on pci0
hdac1: <ATI RS780 High Definition Audio Controller> mem
0xfeae8000-0xfeaebfff irq 19 at device 5.1 on pci1

Any ideas?

-- 
Alexander Motin



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