Comment 3 for bug 474364

True... I was unable to change the state of those mixer controls.

I am wondering if the problem involves a race condition during boot up. After rebooting several times [I am running 3 different operating systems] sound has magically returned. The headphone mixer control in this current session can be muted and un-muted at will.

-Joseph

# lsmod | grep snd
snd_aoa_i2sbus 20552 0
snd_powermac 63484 1 <========= snd_powermac now being used
snd_usb_audio 89528 1
snd_pcm_oss 45156 0
snd_mixer_oss 18880 1 snd_pcm_oss
snd_pcm 83224 4 snd_aoa_i2sbus,snd_powermac,snd_usb_audio,snd_pcm_oss
snd_seq_dummy 2848 0
snd_usb_lib 18248 1 snd_usb_audio
snd_seq_oss 34084 0
snd_seq_midi 7460 0
snd_rawmidi 24976 2 snd_usb_lib,snd_seq_midi
snd_seq_midi_event 7184 2 snd_seq_oss,snd_seq_midi
snd_hwdep 8444 1 snd_usb_audio
snd_seq 57596 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 24532 2 snd_pcm,snd_seq
snd_seq_device 7788 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd 67724 16 snd_aoa_i2sbus,snd_powermac,snd_usb_audio,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_hwdep,snd_seq,snd_timer,snd_seq_device
snd_aoa_soundbus 5532 1 snd_aoa_i2sbus
snd_page_alloc 9748 1 snd_pcm
soundcore 7188 1 snd