[root@aronnetbook aron]# 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_pcm                78484  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_timer              19593  1 snd_pcm
snd                    62670  15 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore               6299  1 snd
snd_page_alloc          7431  2 snd_hda_intel,snd_pcm
[root@aronnetbook aron]# rmmod snd_hda_codec_hdmi
ERROR: Module snd_hda_codec_hdmi is in use
[root@aronnetbook aron]# rmmod snd_hda_codec_conexant
ERROR: Module snd_hda_codec_conexant is in use
[root@aronnetbook aron]# rmmod snd_hda_codec_intel
ERROR: Module snd_hda_codec_intel does not exist in /proc/modules
[root@aronnetbook aron]# rmmod snd_hda_intel
ERROR: Module snd_hda_intel is in use
[root@aronnetbook aron]# rmmod snd_hda_codec
ERROR: Module snd_hda_codec is in use by snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
[root@aronnetbook aron]# rmmod snd_hwdep
ERROR: Module snd_hwdep is in use by snd_hda_codec
[root@aronnetbook aron]# rmmod snd_pcm
ERROR: Module snd_pcm is in use by snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
[root@aronnetbook aron]# rmmod snd_timer
ERROR: Module snd_timer is in use by snd_pcm
[root@aronnetbook aron]# rmmod snd
ERROR: Module snd is in use by snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
[root@aronnetbook aron]# rmmod snd_page_alloc
ERROR: Module snd_page_alloc is in use by snd_hda_intel,snd_pcm