Comment 56 for bug 1523100

Same problem here, Acer Aspire VN7-792G

00:1f.3 Multimedia audio controller: Intel Corporation Sunrise Point-H HD Audio (rev 31)

dvitali@denvit-ws1:~ $ aplay -L -1-
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
sysdefault:CARD=PCH
    HDA Intel PCH, ALC255 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
    HDA Intel PCH, ALC255 Digital
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=PCH,DEV=0
    HDA Intel PCH, HDMI 0
    HDMI Audio Output
hdmi:CARD=PCH,DEV=1
    HDA Intel PCH, HDMI 1
    HDMI Audio Output
hdmi:CARD=PCH,DEV=2
    HDA Intel PCH, HDMI 2
    HDMI Audio Output

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Linux denvit-ws1 4.10.3-1-ARCH #1 SMP PREEMPT Wed Mar 15 09:17:17 CET 2017 x86_64 GNU/Linux
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dvitali@denvit-ws1:~ $ cat /proc/asound/cards -1-
 0 [PCH ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0x84320000 irq 129
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pacman -Q | grep ^alsa
alsa-lib 1.1.3-1
alsa-plugins 1.1.1-1
alsa-utils 1.1.3-2
alsaequal 0.6-16