kern/55395: ICH sampling rate changes after resume from suspend

[Kevin Oberman]

>Number:         55395
>Category:       kern
>Synopsis:       ICH sampling rate changes after resume from suspend
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Aug 08 11:10:14 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Kevin Oberman
>Release:        FreeBSD 5.1-CURRENT i386
>Organization:
ESnet-The Energy Sciences Network
>Environment:
System: FreeBSD puppeteer.es.net 5.1-CURRENT FreeBSD 5.1-CURRENT #19: Fri Aug 8 07:37:52 PDT 2003 oberman at puppeteer.es.net:/usr/obj/usr/src/sys/IBM-T30-D i386

>Description:
	If I suspend and resume (apm) my IBM T30, the sampling rate on
	the ICH3 is too high. I have not done careful timing, but I
	seem to gain about 5 seconds/minute. It is enough to make the
	audio very unpleasant when playing MP3s.

>How-To-Repeat:
	Suspend and resume. Play audio
>Fix:
	Only known work-around is a reboot. I suspect that reloading
	the driver would do it, but I have pcm in my kernel at this
	time. Will try a kernel without PCI when I get some time.

	I will admit that I can see nothing in the driver's resume
	code that seems likely to cause this, but I'm none too
	familiar with the code and probably missed something.

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