port-i386/34880: azalia support for Mac mini and MacBook Pro

>Number:         34880
>Category:       port-i386
>Synopsis:       azalia produces no output on Mac mini and MacBook Pro (intel)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 22 18:45:00 +0000 2006
>Originator:     seebs@xxxxxxxxx
>Release:        NetBSD 4.99.3
>Organization:
>Environment:
System: NetBSD knives.seebs.net 4.99.3 NetBSD 4.99.3 (KNIVES) #2: Sun Oct 22 
13:11:31 CDT 2006 seebs@xxxxxxxxxxxxxxxx:/usr/src/sys/arch/i386/compile/KNIVES 
i386
Architecture: i386
Machine: i386
>Description:
        The azalia audio hardware on intel macs is quirky, and does not
        produce output with the azalia driver.
>How-To-Repeat:
        Get a Mac mini (intel version).  Try to play sound.
>Fix:
        None known yet.  TAMURA Kent has a patch which may be dealing with
        some of the issues (a very odd GPIO-based mute feature), but this
        seems not to solve everything.