grep -i conexant /boot/config-4.2.3-200.fc22.x86_64 && lsmod| grep -i conexant && sudo dmidecode -t 1
CONFIG_SND_HDA_CODEC_CONEXANT=m
snd_hda_codec_conexant    24576  0
snd_hda_codec_generic    73728  2 snd_hda_codec_realtek,snd_hda_codec_conexant
snd_hda_codec         126976  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel
snd_hda_core           61440  6 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd                    77824  27 snd_hda_codec_realtek,snd_soc_core,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_compress
# dmidecode 2.12
SMBIOS 2.7 present.

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: LENOVO
	Product Name: 20298
	Version: Lenovo IdeaPad S510p
	Serial Number: WB12749776WB03091601
	UUID: 4CBB4889-1F2A-11E3-BEA5-3C970EC29446
	Wake-up Type: Power Switch
	SKU Number: LENOVO_MT_20298
	Family: IDEAPAD