pcm says `channel dead' with snd_hda

[Zhihao Yuan]

~> uname -a FreeBSD compaq.yuetime 8.2-PRERELEASE FreeBSD 8.2-PRERELEASE #8:
Thu Nov 25 15:48:19 CST 2010
root at compaq.yuetime:/usr/obj/usr/src/sys/HOUKAGO
amd64

Sometimes, pcm prints the following message to the console & dmesg.
pcm0: chn_write(): pcm0:virtual:dsp0.vp0: play interrupt timeout, channel
dead

What's wrong? I haven't seen this in 8.1-RELEASE or other version before.
One post said that such message comes with noise, but I'm not sure. I uses
mplayer, sometimes quodlibet (gstreamer backend).

-- 
Zhihao Yuan
The best way to predict the future is to invent it.