Under 12.04 :

How do I disable globally the internal speaker of my computer without having to unset it to each user session ?

I've tried to add "blacklist pcspkr" into "/etc/modprobe.d/blacklist" but it still let pulseaudio to use the internal speaker.

Here is the lsmod that doesn't appear to show the pc speaker working :

Module                  Size  Used by

coretemp               13361  0

dcdbas                 14098  0

snd_hda_codec_via      46188  1

microcode              18395  0

snd_hda_intel          33028  5

snd_hda_codec         116476  2 snd_hda_codec_via,snd_hda_intel

snd_hwdep              13276  1 snd_hda_codec

snd_pcm                81052  4 snd_hda_intel,snd_hda_codec

snd_seq_midi           13132  0

snd_rawmidi            25425  1 snd_seq_midi

snd_seq_midi_event     14475  1 snd_seq_midi

serio_raw              13031  0

lpc_ich                16992  0

snd_seq                51568  2 snd_seq_midi,snd_seq_midi_event

hid_generic            12445  0

snd_timer              28931  2 snd_pcm,snd_seq

snd_seq_device         14137  3 snd_seq_midi,snd_rawmidi,snd_seq

snd                    62520  17 snd_hda_codec_via,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device

mac_hid                13077  0

soundcore              14635  1 snd

snd_page_alloc         14108  2 snd_hda_intel,snd_pcm

lp                     17455  0

parport                40930  1 lp

usbhid                 46022  0

hid                    82474  2 hid_generic,usbhid

aufs                  159970  69

overlayfs              27511  0

squashfs               36095  1

nbd                    17427  1

r8169                  56852  0

i915                  470739  0

drm_kms_helper         45427  1 i915

drm                   231841  2 i915,drm_kms_helper

i2c_algo_bit           13316  1 i915

video                  19069  1 i915

However I'm hearing music from the pc speaker.

Maybe it's at the pulseaudio level but how to do the change global and not limited to one user ?

Thank you !