:~# lsmod |grep ^snd|awk {'print $1'}|xargs rmmod
ERROR: Module snd_hda_intel is in use
ERROR: Module snd_hda_codec is in use by snd_hda_intel
ERROR: Module snd_pcm is in use by snd_hda_intel,snd_hda_codec
ERROR: Module snd_timer is in use by snd_pcm
ERROR: Module snd is in use by snd_hda_intel,snd_hda_codec,snd_pcm,snd_timer
ERROR: Module snd_page_alloc is in use by snd_hda_intel,snd_pcm