Date: Tue, 25 Sep 2001 05:01:58 +0200 (CEST) From: aaron <aaron@lo-res.org> To: FreeBSD-gnats-submit@freebsd.org Subject: i386/30808: t4dwave on Acer Alladin M5451 interrupt problem Message-ID: <200109250301.f8P31wQ85664@meta.lo-res.org>
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>Number: 30808
>Category: i386
>Synopsis: t4dwave on Acer Alladin M5451 interrupt problem
>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: Mon Sep 24 20:00:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: aaron
>Release: FreeBSD 4.4-RELEASE i386
>Organization:
home
>Environment:
System: FreeBSD chillig.lo-res.org 4.4-RELEASE FreeBSD 4.4-RELEASE #1: Tue Sep 25 04:32:19 CEST 2001 root@chillig.lo-res.org:/usr/src/sys/compile/chillig i386
>Description:
Running an Acer TravelMate 512TE.
sound output is only _sometimes_ possible.
The TravelMate uses an Acer M5451 sound chip. however if I kldload
snd_t4dwave.ko I sometimes get the message:
pcm0: play interrupt timeout, channel dead
I highly assume this is because of IRQ sharing between the soundcard
and the graphics card (both are on IRQ 10), grfx card is:
ATI Rage Mobility Pro
On other occasions sound will work - but only for the first time.
After opening the device and closing it the next open will result
in no sound output.
I did a comparison: 5.0-current works with this laptop. sound plays
perfectly and every time.
But rest assured, commercial OSS is far behind in supporting that
irq-sharing monster :]
>How-To-Repeat:
share interrupts with sound card.
kldload t4dwave for an M5451 chip based sound card
try to play some wav/mp3
observe kern logs
>Fix:
no fix known.
>Release-Note:
>Audit-Trail:
>Unformatted:
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