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kern/38096: Regression with auvia in 4.0 (OSS sound is choppy)

>Number:         38096
>Category:       kern
>Synopsis:       Regression with auvia in 4.0 (OSS sound is choppy)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 24 00:25:00 +0000 2008
>Originator:     Rhialto
>Release:        NetBSD 4.0
System: NetBSD 4.0 NetBSD 4.0 (LOELAPPIE4.0) #1: Sun Jan 13 
17:56:39 CET 2008 
Architecture: i386
Machine: i386
        OSS sound (at least on my laptop) is choppy again.
        This is a regression, since it used to have been fixed in (or
        before) 3.0.
        It occurs in MPlayer after some time: first the sound is ok,
        then it becomes choppy. Pausing and unpausing fixes it for some
        time, then the problem recurs.

        Using Sun audio works ok, in the cases I have tried.

auvia0 at pci0 dev 17 function 5: VIA Technologies VT82C686A AC'97 Audio (rev 
auvia0: interrupting at irq 9
auvia0: ac97: VIA Technologies VT1612A codec; headphone, 18 bit DAC, 18 bit 
ADC, KS Waves 3D
auvia0: ac97: ext id 201<AMAP,VRA>
audio0 at auvia0: full duplex, mmap, independent

        Play movie in mplayer. Be annoyed by choppy sound after a few minutes.
        Workaround: use Sun audio. (at least the volume control still works,
        that used to be broken with sun audio and the reason to prefer OSS)

___ Olaf 'Rhialto' Seibert      -- You author it, and I'll reader it.
\X/ rhialto/at/        -- Cetero censeo "authored" delendum esse.

A: Because it messes up the order in which people normally read text.
>Q: Why is top-posting such a bad thing?
>>A: Top-posting.
>>>Q: What is the most annoying thing in mail and news?

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