Bug 25859

Summary:	Program crash will kill sound device if it's using it.
Product:	Base System	Reporter:	Nate Dannenberg <natedac>
Component:	kern	Assignee:	cg
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	Unspecified
Hardware:	Any
OS:	Any

Description Nate Dannenberg 2001-03-16 23:40:00 UTC

If a program crashes while it's writing to the sound device, the kernel
fails to close the device, rendering it dead.  Instread of closing the
device, you are given the kernel message "pcm0: play interrupt timeout,
channel dead".

Fix: 

If you use the kernel sound modules instead of compiling the driver into
the kernel, it seems to work better.  The kernel won't allow me to unload
the modules while the sound device is actively in use, but I haven't had
the opportunity to try this method to clean up after a sound application
crashes.

-- 
 /~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~___~~~~~\
|  natedac@kscable.com              //Z@|___  |
|  http://home.kscable.com/natedac |'(__ [_<  |
 \_C64/C128_-_What's_*YOUR*_hobby?__\___|____/
How-To-Repeat: 
Run any sound-capable program such as mpg123, and find some way to
forcibly crash it would allowing it to exit cleanly.  It should leave the
sound device hosed, and further attempts to play sounds should report that
the device is "busy".

Comment 1 Kris Kennaway freebsd_committer

2001-03-24 05:47:20 UTC

Responsible Changed
From-To: freebsd-bugs->cg

cameron is Mr sound

Comment 2 Nate Dannenberg 2001-03-26 00:41:37 UTC

Please close this report.  Like the XFree86 4.x problem, I somehow managed to create two separate reports.  The other version should 
remain, it's the one I'll be paying attention to, and it's more up to date :-)

-- 
 /~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~___~~~~~\
|  natedac@kscable.com              //Z@|___  |
|  http://home.kscable.com/natedac |'(__ [_<  |
 \_C64/C128_-_What's_*YOUR*_hobby?__\___|____/

Comment 3 greid freebsd_committer

2001-04-08 23:19:57 UTC

State Changed
From-To: open->closed

Closed at submitter's request