>Number:         12843
>Category:       kern
>Synopsis:       CS4280 audio works incorrectly on IBM ThinkPad T20
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat May 05 09:48:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Jason R. Thorpe
>Release:        Wed Apr 25 08:50:15 PDT 2001
>Organization:
Zembu Labs, Inc.
>Environment:
	
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
Architecture: i386
Machine: i386

clcs0 at pci0 dev 5 function 0: Cirrus Logic CS4280 CrystalClear Audio Interface
 (rev. 0x01)
clcs0: interrupting at irq 11
clcs0: CRY20 codec; headphone, 20 bit DAC, 18 bit ADC, Spatializer 3D
audio0 at clcs0: full duplex, independent

>Description:
	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).

>How-To-Repeat:
	See above.

>Fix:
	Not provided.
>Release-Note:
>Audit-Trail:
>Unformatted: