Hi,
since "current" version with kernel 5.10.x I lost sound. I tried the last kernel version in testing 5.11.3 bat nothing has changed. (vers. 5.4.82 is ok)

In dmesg I found these errors:

[ 0.000000] Linux version 5.11.3 (root@z-mp.slackware.lan) (gcc (GCC) 10.2.0, GNU ld version 2.36.1-slack15) #1 SMP Thu Mar 4 14:34:11 CST 2021

[ 6.793870] snd_soc_skl 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040100
[ 6.793900] snd_soc_skl 0000:00:1f.3: Digital mics found on Skylake+ platform, using SST driver
[ 6.794553] snd_soc_skl 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 6.848378] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 6.849896] thermal thermal_zone7: failed to read out thermal zone (-61)
[ 6.852838] HDMI HDA Codec ehdaudio0D2: Max dais supported: 3
[ 6.870775] snd_soc_skl 0000:00:1f.3: Direct firmware load for 9d71-ACRSYS-ACRPRDCT-2-tplg.bin failed with error -2
[ 6.870915] snd_soc_skl 0000:00:1f.3: tplg fw 9d71-ACRSYS-ACRPRDCT-2-tplg.bin load failed with -2, trying alternative tplg name skl_hda_dsp_generic-tplg.bin
[ 6.871084] snd_soc_skl 0000:00:1f.3: Direct firmware load for skl_hda_dsp_generic-tplg.bin failed with error -2
[ 6.871187] snd_soc_skl 0000:00:1f.3: tplg skl_hda_dsp_generic-tplg.bin failed with -2, falling back to dfw_sst.bin
[ 6.871321] snd_soc_skl 0000:00:1f.3: Direct firmware load for dfw_sst.bin failed with error -2
[ 6.871410] snd_soc_skl 0000:00:1f.3: Fallback tplg fw dfw_sst.bin load failed with -2
[ 6.871487] snd_soc_skl 0000:00:1f.3: Failed to init topology!
[ 6.871545] snd_soc_skl 0000:00:1f.3: ASoC: error at snd_soc_component_probe on 0000:00:1f.3: -2
[ 6.871629] snd_soc_skl 0000:00:1f.3: ASoC: failed to probe component -2
[ 6.871748] skl_hda_dsp_generic skl_hda_dsp_generic: ASoC: failed to instantiate card -2
[ 6.872009] skl_hda_dsp_generic: probe of skl_hda_dsp_generic failed with error -2

Some ideas, suggestions
Many tanks in advance

n.b.
my notebook is Acer Swift with intel i5 arch: Kaby Lake, audio Intel Sunrise Point-LP HD Audio

I am a former Arch user, their docs always useful for generic purposes, and this is what I found there, https://wiki.archlinux.org/index.php...les_parameters, maybe it will help you.

2 members found this post helpful.

Solved.
Used Arch guide with some modification.