Comment # 2 on bug 1173720 from Alberto Zacchetti

lspci -nnk | grep -A2 Audio

00:1b.0 Audio device [0403]: Intel Corporation C600/X79 series chipset High
Definition Audio Controller [8086:1d20] (rev 06)
        Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:d735]
        Kernel driver in use: snd_hda_intel
--
03:00.1 Audio device [0403]: NVIDIA Corporation GK107 HDMI Audio Controller
[10de:0e1b] (rev a1)
        Subsystem: CardExpert Technology Device [10b0:0fc6]
        Kernel driver in use: snd_hda_intel

lsmod | grep snd

snd_hda_codec_realtek   131072  1
snd_hda_codec_generic    94208  1 snd_hda_codec_realtek
ledtrig_audio          16384  2 snd_hda_codec_generic,snd_hda_codec_realtek
snd_hda_codec_hdmi     73728  1
snd_hda_intel          53248  3
snd_hda_codec         163840  4
snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core          110592  5
snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_hwdep              16384  1 snd_hda_codec
snd_pcm               155648  4
snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
snd_timer              40960  1 snd_pcm
snd                   106496  14
snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm
soundcore              16384  1 snd

aplay -L

null
    Discard all samples (playback) or generate zero samples (capture)
default
    Default ALSA Output (currently PulseAudio Sound Server)
sysdefault:CARD=PCH
    HDA Intel PCH, ALC892 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
    HDA Intel PCH, ALC892 Digital
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=NVidia,DEV=0
    HDA NVidia, HDMI 0
    HDMI Audio Output
hdmi:CARD=NVidia,DEV=1
    HDA NVidia, HDMI 1
    HDMI Audio Output
hdmi:CARD=NVidia,DEV=2
    HDA NVidia, HDMI 2
    HDMI Audio Output
hdmi:CARD=NVidia,DEV=3
    HDA NVidia, HDMI 3
    HDMI Audio Output
hdmi:CARD=NVidia,DEV=4
    HDA NVidia, HDMI 4
    HDMI Audio Output
hdmi:CARD=NVidia,DEV=5
    HDA NVidia, HDMI 5
    HDMI Audio Output

With the speaker-test command I can listen to the sound through headphones and
adjust the volume with the Yast controls, but in Yast the button to test the
sound does not give any output. It looks like a configuration problem, but I
don't know where to take action.