kern/90837: PCM - ICH6 - device is busy, but old process doesn't exist anymore

Edwin Groothuis edwin at
Thu Dec 22 18:50:09 PST 2005

>Number:         90837
>Category:       kern
>Synopsis:       PCM - ICH6 - device is busy, but old process doesn't exist anymore
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 23 02:50:03 GMT 2005
>Originator:     Edwin Groothuis
>Release:        FreeBSD 6.0-RELEASE i386
System: FreeBSD k7.mavetju 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Nov 3 09:36:13 UTC 2005 root at x64.samsco.home:/usr/obj/usr/src/sys/GENERIC i386


newpcm driver doesn't realize that an old process doesn't exist
anymore and I thus can't use it anymore:

FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <Intel ICH6 (82801FB)> at io 0xf4001000, 0xf4002000 irq 17 bufsz 16384 kld snd_ich (1p/1r/0v channels duplex default)
	[pcm0:play:0]: spd 22050/48000, fmt 0x00000020/0x10000010, flags 0x00001030, 0x00000010, pid 9704
	interrupts 164390, underruns 164361, ready 0
	{userland} -> feeder_root(0x00000020) -> feeder_monotostereo16(0x00000020 -> 0x10000020) -> feeder_endian(0x10000020 -> 0x10000010) -> feeder_rate(22050 -> 48000) -> {hardware}
	[pcm0:record:0]: spd 0, fmt 0x00000000/0x00000008, flags 0x00000000, 0x00000000
	interrupts 0, overruns 0, hfree 16384, sfree 0
	{hardware} -> feeder_root(0x00000000) -> {userland}

No messages in /var/log/messages.


I think it happened when net-im/gaim received a message while
multimedia/xmms was just starting up, but haven't been able to
reproduce it up to now.



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