I'm running Solaris 10 FCS on an Ultra-2.

Somehow the audio device seems to have gotten locked up
into a state where it will not drain.

% truss audioplay new_mail_has_arrived.wav
...
open("/dev/audio", O_WRONLY|O_NONBLOCK) = 5
fcntl(5, F_GETFL) = 129
fcntl(5, F_SETFL, FREAD) = 0
ioctl(5, AUDIO_GETINFO, 0xFFBFECF4) = 0
ioctl(5, AUDIO_DRAIN, 0x00000000) = 0
ioctl(5, I_FLUSH, FLUSHW) = 0
ioctl(5, AUDIO_SETINFO, 0xFFBFECDC) = 0
fstat(4, 0xFFBFF2A8) = 0
mmap(0x00000000, 30824, PROT_READ, MAP_SHARED, 4, 0) = 0xFF350000
memcntl(0xFF350000, 30824, MC_ADVISE, MADV_SEQUENTIAL, 0, 0) = 0
lseek(4, 0, SEEK_CUR) = 64
write(5, "848384848384838383838383".., 30760) = 30760
write(5, 0xFF350040, 0) = 0
munmap(0xFF350000, 30824) = 0
close(4) = 0
ioctl(5, AUDIO_DRAIN, 0x00000000) (sleeping...)

How do I get this unstuck? This program has successfully
opened /dev/audio already; there is no other program currently
using this device. No sound is being emitted (the internal
speaker [only] is enabled, at a reasonable volume level).
Until it drains successfully, I cannot play any audio clips,
and programs which depend on doing so will hang.