5.2.1-RC hangs occasionally when sound files are played using the pcm driver

Mathew Kanner mat at cnd.mcgill.ca
Sun Feb 22 22:24:52 PST 2004

On Feb 23, Brian O'Shea wrote:
> Hello Hackers,
> My system:
> $ uname -a
> FreeBSD apsara 5.2.1-RC FreeBSD 5.2.1-RC #0: Sat Feb  7 21:38:15 PST 2004    
> root at apsara:/usr/src/sys/i386/compile/APSARA  i386
> $ dmesg | grep pcm
> pcm0: <CMedia CMI8738> port 0xd400-0xd4ff irq 16 at device 14.0 on pci0
> (full dmesg output attached)
> Occasionally my system will lock up when audio files are played.  I am using
> the pcm driver with a CMI 8738 on-board 6-channel audio chip (SoyoPX400 Dragon
> Lite motherboard).  No crash dump, no panic message is displayed; the system
> just freezes.  It does not happen regularly--probably only once in 10 or 20
> times that the audio device is used.  When it does happen, it can happen
> immediately after the audio file is played, or sometimes after several
> seconds.
> A quick search of the -hackers and -questions archives didn't turn up any
> matches.  Has anyone else seen this behavior?  Would it be more useful for
> me to build a debug kernel with INVARIANTS enabled and try to get the
> system to panic?

	Hello Brian,
	Don Lewis commited changes to the 5.2- tree on 2/14.  Could
you update and try again, also please do run with witness and
invariants, and if possible try to get a crashdump so we can see
what's happening.


	The state has no business in the bedrooms of the
			- Pierre Elliott Trudeau

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