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kern/51710: audio playback works only once

>Number:         51710
>Category:       kern
>Synopsis:       audio playback works only once
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 12 09:50:00 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.46
The NetBSD Foundation, Inc.
System: NetBSD 7.99.46 NetBSD 7.99.46 (WHOEVER) #42: Mon Dec 12 09:03:59 CET 2016 sparc64
Architecture: sparc64
Machine: sparc64

Audio playback worked once, but further tries do not render any sound.
audioctl hangs when exiting:

 724 pts/1- DE   0:00.00 (audioctl)

Will reproduce with a AUDIO_DEBUG kernel later, can't reboot right now.

I also notice that the audio related sysctl variables are not present
any more (but this may be completely unrelated).

Relevant dmesg part:

autri0 at pci2 dev 8 function 0: Acer Labs M5451 AC-Link Controller Audio Device (rev. 0x02)
autri0: interrupting at ivec 7a4
autri0: ac97: Analog Devices AD1881A codec; headphone, Analog Devices Phat Stereo
audio0 at autri0: full duplex, playback, capture, mmap, independent
midi0 at autri0: 4DWAVE MIDI UART


Use mpg123 several times on this machine. Notice it only works once.


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