Date: Sat, 14 May 2005 14:55:40 +0200 From: Phil Regnauld <regnauld@catpipe.net> To: FreeBSD-gnats-submit@FreeBSD.org Subject: misc/81013: Intel ICH3 sound chip reverts to 48KHz after suspend/resume Message-ID: <20050514125354.6B44D17001@flow.starbsd.org> Resent-Message-ID: <200505141300.j4ED0KCU018265@freefall.freebsd.org>
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>Number: 81013 >Category: misc >Synopsis: Intel ICH3 sound chip reverts to 48KHz after suspend/resume >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: Sat May 14 13:00:20 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Phil Regnauld >Release: FreeBSD 6.0-CURRENT i386 >Organization: catpipe Systems ApS >Environment: System: FreeBSD flow.eu.org 6.0-CURRENT FreeBSD 6.0-CURRENT #2: Wed May 11 13:03:32 CEST 2005 root@flow.eu.org:/usr/obj/usr/src/sys/FLOW5 i386 >Description: The ICH series of sound chips apparently only handle 48KHz fixed rate. To work around this, the FreeBSD sound driver does resampling. Unfortunately, it seems that on the tested system (IBM ThinkPad X23 with ICH3 -- see below), suspending via acpiconf -s 3, and later resuming causes samples to be played at 48KHz again. The result is music running 10% faster (which is indeed audible). This has been observed on 5.3-STABLE and 6.0-CURRENT. pcm0: <Intel ICH3 (82801CA)> at io 0x1c00, 0x18c0 irq 9 bufsz 16384 (1p/1r/2v channels duplex default) It should be possible to reset the driver ? Since the sound driver is compiled in, unloading/reloading the driver has not (yet) been tested. >How-To-Repeat: acpiconf -s 3 resume system Play something via mpg123 or xmms mplayer -speed 0.92 (44.1/48*100) will allow one to play the music / media at the right speed. >Fix: No fix known. >Release-Note: >Audit-Trail: >Unformatted:
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