misc/61388: pcm stopped working on an ASUS M2400N Notebook since 5.2R

[Chris at host2.beine-computer.de]

>Number:         61388
>Category:       misc
>Synopsis:       pcm stopped working on an ASUS M2400N Notebook since 5.2R
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jan 15 09:10:15 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Chris Burkert
>Release:        FreeBSD 5.2-RELEASE i386
>Organization:
private
>Environment:
System: FreeBSD banias.csn.tu-chemnitz.de 5.2-RELEASE FreeBSD 5.2-RELEASE #1: Wed Jan 14 13:16:04 CET 2004 chbu at banias.csn.tu-chemnitz.de:/usr/src/sys/i386/compile/BANIAS-5.2 i386
		The sounddevice should be: pcm0: <SigmaTel STAC9721/23 AC97 Codec>

>Description:
The ASUS M2400N Notebooks have a SigmaTel sound device which worked perfect with 5.0R and 5.1R. Since 5.2R it doesn't work anymore.
		The 5.1R dmesg says:	pcm0: <SigmaTel STAC9721/23 AC97 Codec>
		The 5.2R dmesg says:	pcm0: <Intel ICH4 (82801DB)> port 0xe100-0xe13f,0xe000-0xe0ff at device 31.5 on pci0
					pcm0: unable to map IO port space
					device_probe_and_attach: pcm0 attach returned 6
		I have feedback that it also didn't work in CURRENT December 2003.
		Maybe this has something to do with the ACPI changes.
		I also heard that newer models have other sound devices.
		See also:
		- http://groups.google.com/groups?q=M2400N+pcm&hl=en&lr=&ie=UTF-8&oe=utf-8&selm=bsq4ir%248rk%241%40FreeBSD.csie.NCTU.edu.tw&rnum=1
		- http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=utf-8&selm=1071330727.904.19.camel%40tyrael.linnet
		- The ACPI Thread: http://www.freebsd.org/cgi/query-pr.cgi?pr=i386/57909

>How-To-Repeat:
Install 5.2R and add 'device pcm' to your kernel config.

>Fix:
???
>Release-Note:
>Audit-Trail:
>Unformatted: