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>Number: 27237
>Category: kern
>Synopsis: Roland SD-90 Audio I/F may hate set_sample_rate thing
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: kern-bug-people
>State: open
>Class: change-request
>Submitter-Id: net
>Arrival-Date: Tue Oct 12 17:56:00 UTC 2004
>Closed-Date:
>Last-Modified:
>Originator: DHOYASHIKI Shinichi <clare@xxxxxxxxxx>
>Release: NetBSD 2.99.9 near 2004-10-04
>Organization:
at home
>Environment:
System: NetBSD minako 2.99.9 NetBSD 2.99.9 (MINAKO5) #2: Mon Oct 4 11:11:00 JST
2004
clare@minako:/work/netbsd/sys/arch/i386/compile/MINAKO5 i386
Architecture: i386
Machine: i386
>Description:
Roland SD-90 may hate uaudio(4)'s set_sample_rate request, and does not
respond by proper error handling (no STALL replied immediately.)
Therefore, uaudio(4) freezes until USB request timed up.
Roland SD-90 is fixed-sample-rate device, no set_sample_rate was needed
to play with it.
>How-To-Repeat:
1) prepare uaudio(4) enabled kernel
2) attach Roland SD-90 Audio I/F (generic mode) to your computer
via USB cable
3) play a waveform via audioplay(1)
>Fix:
To avoid hitting a bug of the device, may be needed adding a quirk to
uaudio(4) driver.
http://www.znet.or.jp/~clare/music/umidi3.diff
(this is mixtured patch, sorry.)
>Release-Note:
>Audit-Trail:
>Unformatted:
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