Bug confirmed. It has nothing to do with PulseAudio, as it isn't even
installed. The problem is speech-dispatcher takes over semaphore to ALSA
device when run via init script. Furthermore, in my case, it fails to
release the lock on termination.
sudo /etc/init.d/speech-dispatcher start
spd-say "panda"
...
sudo /etc/init.d/speech-dispatcher stop
sudo ipcs -a
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x0056b4d5 8388611 speech-dis 660 488 0
0x0056b4d6 8421380 speech-dis 660 131072 0
------ Semaphore Arrays --------
key semid owner perms nsems
0x0056b4d5 1769474 speech-dis 660 1
** Changed in: speech-dispatcher (Ubuntu)
Status: Invalid => Confirmed
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spd locks up Alsa
https://bugs.launchpad.net/bugs/382102
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