same problem here with
Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
dmesg | grep snd [ 48.320847] snd: Unknown symbol unregister_sound_special [ 48.320974] snd: Unknown symbol register_sound_special_device [ 48.321345] snd: Unknown symbol sound_class [ 48.677331] snd_hwdep: Unknown symbol snd_info_register [ 48.677376] snd_hwdep: Unknown symbol snd_info_create_module_entry ...
same problem here with
Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
dmesg | grep snd sound_special sound_special_ device create_ module_ entry
[ 48.320847] snd: Unknown symbol unregister_
[ 48.320974] snd: Unknown symbol register_
[ 48.321345] snd: Unknown symbol sound_class
[ 48.677331] snd_hwdep: Unknown symbol snd_info_register
[ 48.677376] snd_hwdep: Unknown symbol snd_info_
...