Bug 14990

Summary: new-pcm caveats
Product: Base System Reporter: Vladimir N.Silyaev <vns>
Component: kernAssignee: cg
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 4.0-CURRENT   
Hardware: Any   
OS: Any   
Attachments:
Description Flags
file.diff
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file.shar none

Description Vladimir N.Silyaev 1999-11-19 02:30:00 UTC 
	Some times, after changing tracks, the sound card produce white
	noise instead of audio clip.

Fix: This error, as say my own investigation, don't depend from soundcard
	type, but caused some problem, which occured when underflow
	condition occured in the DMA buffer. The current implementation
	don't work properly with this situation at all. 
	So next patch try to solve most of the problem occured with
	play back in the such case of situations.

	After patch follow simple program, which was used for easy testing
	sound card driver in wide spectrum of formats and frequencies.

===================================================================


===================================================================
How-To-Repeat: 
	Start mpg123 program, then press ^Z key (pause the program) and
	then execute bg command. After some tries sound card begin to
	produce white noise.
Comment 1 bill fumerola freebsd_committer freebsd_triage 1999-11-19 02:40:01 UTC 
Responsible Changed
From-To: freebsd-bugs->cg

Over to pcm maintainer.
Comment 2 Ollivier Robert freebsd_committer freebsd_triage 2000-03-28 16:52:52 UTC 
State Changed
From-To: open->closed

Patch applied (cg)