NetBSD Problem Report #57612

From www@netbsd.org  Fri Sep  8 21:28:19 2023
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Date: Fri,  8 Sep 2023 21:28:18 +0000 (UTC)
From: herdware@sdf.org
Reply-To: herdware@sdf.org
To: gnats-bugs@NetBSD.org
Subject: Using audio locks up Shark
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>Number:         57612
>Category:       port-shark
>Synopsis:       Using audio locks up Shark
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-shark-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 08 21:30:01 +0000 2023
>Last-Modified:  Sat Sep 09 10:00:01 +0000 2023
>Originator:     Björn Johannesson
>Release:        10_BETA
>Organization:
>Environment:
NetBSD dnard.home.lan 10.0_BETA NetBSD 10.0_BETA (GENERIC) #1: Wed Sep  6 21:54:35 CEST 2023  herdware@regin.home.lan:/usr/obj/sys/arch/shark/compile/GENERIC shark
>Description:
Using audio on shark/dnard is very stuttery and then it locks up the machine.

This only seems to happen if the machine is booted from local disk. Netbooting with root on nfs doesn't seem to hang on audio but that has other problems.
>How-To-Repeat:
audioplay file.wav
>Fix:

>Audit-Trail:
From: mlelstv@serpens.de (Michael van Elst)
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: port-shark/57612: Using audio locks up Shark
Date: Sat, 9 Sep 2023 09:54:44 -0000 (UTC)

 herdware@sdf.org writes:

 >NetBSD dnard.home.lan 10.0_BETA NetBSD 10.0_BETA (GENERIC) #1: Wed Sep  6 21:54:35 CEST 2023  herdware@regin.home.lan:/usr/obj/sys/arch/shark/compile/GENERIC shark
 >>Description:
 >Using audio on shark/dnard is very stuttery and then it locks up the machine.

 >This only seems to happen if the machine is booted from local disk. Netbooting with root on nfs doesn't seem to hang on audio but that has other problems.

 AFAIK the drive is PIO only, so it's easy to get audio problems.

 Does it work if you copy the wav file to tmpfs first ?
 If yes, does it still work if you read from disk with dd in parallel ?

 Of course, it shouldn't lock up at all. Can you enter ddb in that case?

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