HP Intel i5-8250U laptop - No audio

[Richard Shaw]

I just installed F27 (dual booting with Win 10 that came with it) on my
wife's new laptop and everything seemed fine until she told me the sound
wasn't working.

I checked the usual stuff, that it was configured properly in
gnome-control-center and it showed that the speakers were selected and
configured for "Analog Stereo Duplex". I even installed pavucontrol and
looked there and everything seems fine. Volume sliders are not at 0%
(actually close to 100%)

Pulseaudio is running...

Alsa seems happy:

# aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
default
    Default ALSA Output (currently PulseAudio Sound Server)
sysdefault:CARD=PCH
    HDA Intel PCH, ALC295 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC295 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers


Looking at lspci everything looks good to me:
# lspci -vv -s 00:1f.3
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
        Subsystem: Hewlett-Packard Company Device 83f8
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 32, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 134
        Region 0: Memory at b1328000 (64-bit, non-prefetchable) [size=16K]
        Region 4: Memory at b1300000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [50] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
                Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
                Address: 00000000fee003f8  Data: 0000
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel, snd_soc_skl

It looks like there's plenty of kernel modules loaded:

# lsmod | grep ^snd_hda
snd_hda_codec_hdmi     49152  1
snd_hda_codec_realtek    94208  1
snd_hda_ext_core       24576  1 snd_soc_skl
snd_hda_codec_generic    73728  1 snd_hda_codec_realtek
snd_hda_intel          40960  7
snd_hda_codec         126976  4
snd_hda_intel,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek
snd_hda_core           81920  7
snd_hda_intel,snd_hda_codec,snd_hda_ext_core,snd_soc_skl,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec_realtek

Searching google there seems to be similar issues but most of them were
2016 or earlier posts and frequently the lack of the right kernel module
was part of the problem or alsa update.

I even tried installing the oldest kernel F26 provided (4.11?) and no dice.

Anyone else having this problem before I put in a bugzilla ticket? At this
point I'm not sure which component to assign it to.

Thanks,
Richard