[Milhouse]

Many thanks for your fast reply!
dmesg with build #0311 -> https://pastebin.com/QCvv50Pz
dmesg with build #0312 -> https://pastebin.com/yb0KUub2

Is this a Chromebox? This looks to be a similar issue to the Chromebox problem reported by @matt Devo and others, where a different sound driver is now being loaded (since 4.19.0, actually).

In #0311:

text:


[    3.981964] snd_soc_skl 0000:00:1f.3: No matching machine driver found

[    3.986323] ite_cir: driver has been successfully loaded

[    3.991993] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops 0xffffffffb25928a0)

[    4.020981] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC283: line_outs=1 (0x21/0x0/0x0/0x0/0x0) type:hp

[    4.020985] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)

[    4.020987] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=0 (0x0/0x0/0x0/0x0/0x0)

[    4.020989] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0

[    4.020991] snd_hda_codec_realtek hdaudioC0D0:    inputs:[    4.020993] snd_hda_codec_realtek hdaudioC0D0:      Mic=0x12

[    4.066986] IR NEC protocol handler initialized

[    4.081361] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input6

[    4.081424] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input7

[    4.081483] input: HDA Intel PCH HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8

[    4.081971] input: HDA Intel PCH HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9

[    4.082038] input: HDA Intel PCH HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10

[    4.082095] input: HDA Intel PCH HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:1f.3/sound/card0/input11

[    4.113037] Bluetooth: BNEP (Ethernet Emulation) ver 1.3

But in #0312:

text:


[    2.812024] ite_cir: driver has been successfully loaded

[    2.813818] snd_soc_skl 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040380

[    2.841419] snd_soc_skl 0000:00:1f.3: Linked as a consumer to 0000:00:02.0

[    2.841427] snd_soc_skl 0000:00:1f.3: bound 0000:00:02.0 (ops 0xffffffffaf79b720)

[    2.857738] Bluetooth: Core ver 2.22

[    2.857751] NET: Registered protocol family 31

[    2.857752] Bluetooth: HCI device and connection manager initialized

[    2.857755] Bluetooth: HCI socket layer initialized

[    2.857757] Bluetooth: L2CAP socket layer initialized

[    2.857761] Bluetooth: SCO socket layer initialized

[    2.864984] usbcore: registered new interface driver btusb

[    2.865483] Bluetooth: hci0: Firmware revision 0.1 build 29 week 38 2018

[    2.899467] HDMI HDA Codec ehdaudio0D2: Max dais supported: 3

[    2.901716] snd_soc_skl 0000:00:1f.3: Direct firmware load for 9d71-INTEL-NUC7i3BN-65-tplg.bin failed with error -2

[    2.901721] snd_soc_skl 0000:00:1f.3: tplg fw 9d71-INTEL-NUC7i3BN-65-tplg.bin load failed with -2, falling back to dfw_sst.bin

[    2.901738] snd_soc_skl 0000:00:1f.3: Direct firmware load for dfw_sst.bin failed with error -2

[    2.901742] snd_soc_skl 0000:00:1f.3: Fallback tplg fw dfw_sst.bin load failed with -2

[    2.901744] snd_soc_skl 0000:00:1f.3: Failed to init topology!

[    2.901745] snd_soc_skl 0000:00:1f.3: ASoC: failed to probe component -2

[    2.901756] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: failed to instantiate card -2

[    2.901774] skl_hda_dsp_generic: probe of skl_hda_dsp_generic failed with error -2

[    2.947928] Bluetooth: BNEP (Ethernet Emulation) ver 1.3

It looks like #0312 now finds a matching snd_soc_skl machine driver and uses that in preference to the Realtek driver which then fails to load, presumably due to missing firmware but I've no idea where this firmware is to be found (it's not in the linux-firmware repo) - Googleing for dfw_sst.bin leads me only to ChromeOS and Android-related websites.

Can you try:

text:


echo "blacklist snd_soc_skl" >>/etc/modprobe.d/blacklist.conf

reboot

and see if that helps?

Not really sure how to fix this right now.