Subject: kern/12843: CS4280 audio works incorrectly on IBM ThinkPad T20
To: None <email@example.com>
From: None <firstname.lastname@example.org>
Date: 05/05/2001 09:47:57
>Synopsis: CS4280 audio works incorrectly on IBM ThinkPad T20
>Arrival-Date: Sat May 05 09:48:00 PDT 2001
>Originator: Jason R. Thorpe
>Release: Wed Apr 25 08:50:15 PDT 2001
Zembu Labs, Inc.
System: NetBSD dr-evil 1.5U NetBSD 1.5U (DR-EVIL) #160: Wed Apr 25 08:50:15 PDT 2001 thorpej@dr-evil:/u1/netbsd/src/sys/arch/i386/compile/DR-EVIL i386
clcs0 at pci0 dev 5 function 0: Cirrus Logic CS4280 CrystalClear Audio Interface
clcs0: interrupting at irq 11
clcs0: CRY20 codec; headphone, 20 bit DAC, 18 bit ADC, Spatializer 3D
audio0 at clcs0: full duplex, independent
The CS4280 audio on the T20 doesn't work properly. When
audio is played (I tested an mp3 file with both mpg123 and
madplay), the output is slowed down and filled with static.
The problem "goes away" when disk activity occurs -- e.g. if
I run "find /" while the audio is playing, it sounds much
better (the problem reappears when the disk light goes out).