[aron@aronnetbook ~]$ lsmod | grep snd
snd_hda_codec_hdmi     22998  1
snd_hda_codec_conexant    50734  1
snd_hda_intel          23660  4
snd_hda_codec          80838  3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep               6368  1 snd_hda_codec
snd_seq                52438  0
snd_seq_device          6001  1 snd_seq
snd_pcm                78484  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_timer              19593  2 snd_seq,snd_pcm
snd                    62670  17 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer
soundcore               6299  1 snd
snd_page_alloc          7431  2 snd_hda_intel,snd_pcm
[aron@aronnetbook ~]$ rmmod snd_hda_codec_hdmi
ERROR: Module snd_hda_codec_hdmi is in use
[aron@aronnetbook ~]$ rmmod snd_hda_codec_conexant
ERROR: Module snd_hda_codec_conexant is in use
[aron@aronnetbook ~]$ rmmod snd_hda_intel
ERROR: Module snd_hda_intel is in use
[aron@aronnetbook ~]$ rmmod snd_hda_codec
ERROR: Module snd_hda_codec is in use by snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
[aron@aronnetbook ~]$ rmmod snd_hwdep
ERROR: Module snd_hwdep is in use by snd_hda_codec
[aron@aronnetbook ~]$ rmmod snd_seq
ERROR: Removing 'snd_seq': Operation not permitted
[aron@aronnetbook ~]$ rmmod snd_pcm
ERROR: Module snd_pcm is in use by snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
[aron@aronnetbook ~]$ rmmod snd_timer
ERROR: Module snd_timer is in use by snd_seq,snd_pcm
[aron@aronnetbook ~]$ rmmod soundcore
ERROR: Module soundcore is in use by snd
[aron@aronnetbook ~]$ rmmod snd_seq_device
ERROR: Module snd_seq_device is in use by snd_seq
[aron@aronnetbook ~]$ snd_page_alloc
bash: snd_page_alloc: command not found
[aron@aronnetbook ~]$ rmmod snd_page_alloc
ERROR: Module snd_page_alloc is in use by snd_hda_intel,snd_pcm