No sound card found - HP Elitebook

I'm configuring Manjaro KDE in a HP Elitebook 840 G6 and was surprised to discover that it isn't identifying any soundcard at all. I have a "Dummy-output". Running aplay -l, result is "no soundcard found". cat /proc/asound/cards returns also "no soundcards". I've run alsa-info.sh --upload to generate the help file. This is the link: http://alsa-project.org/db/?f=d25fa5c7eb056af278c13487aca492a64255d444.
I cannot say how it behaves on Windows, because it has only this OS. Running Manjaro KDE in the LiveUSB doesn't make any difference. No soundcard at all. When I go into BIOS, there are still those annoying sounds from internal speakers. But I'm a lay person, don't know whether this means that everything is fine with the laptop. This laptop was just bought by the company where I work, is pretty new. Shouldn't have such a hardware problem.
Any hint where should I begin with?
Thanks!

As I can see, the intel hd driver should work.

And how do I make it work? Any additional installation?

Can you post the output of lsmod ?

Sure, this is what I get:

Module                  Size  Used by
ccm                    20480  6
snd_seq_dummy          16384  0
snd_hrtimer            16384  1
snd_seq                86016  7 snd_seq_dummy
snd_seq_device         16384  1 snd_seq
rfcomm                 90112  20
fuse                  143360  5
cmac                   16384  2
algif_hash             16384  1
algif_skcipher         16384  1
af_alg                 32768  6 algif_hash,algif_skcipher
usbhid                 65536  0
uas                    32768  0
bnep                   28672  2
btusb                  65536  0
uvcvideo              114688  0
btrtl                  24576  1 btusb
btbcm                  20480  1 btusb
btintel                32768  1 btusb
videobuf2_vmalloc      20480  1 uvcvideo
bluetooth             696320  43 btrtl,btintel,btbcm,bnep,btusb,rfcomm
videobuf2_memops       20480  1 videobuf2_vmalloc
videobuf2_v4l2         28672  1 uvcvideo
videobuf2_common       57344  2 videobuf2_v4l2,uvcvideo
videodev              274432  3 videobuf2_v4l2,uvcvideo,videobuf2_common
usb_storage            81920  1 uas
mc                     61440  4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
ecdh_generic           16384  1 bluetooth
ecc                    36864  1 ecdh_generic
squashfs               69632  0
loop                   40960  0
snd_hda_codec_hdmi     73728  0
snd_soc_hdac_hdmi      40960  0
snd_hda_codec_realtek   135168  0
snd_hda_codec_generic    98304  1 snd_hda_codec_realtek
hid_sensor_als         20480  0
hid_sensor_trigger     20480  2 hid_sensor_als
industrialio_triggered_buffer    16384  1 hid_sensor_als
kfifo_buf              16384  1 industrialio_triggered_buffer
hid_sensor_iio_common    20480  2 hid_sensor_trigger,hid_sensor_als
industrialio           98304  4 industrialio_triggered_buffer,hid_sensor_trigger,kfifo_buf,hid_sensor_als
x86_pkg_temp_thermal    20480  0
snd_soc_dmic           16384  0
intel_powerclamp       20480  0
hid_sensor_hub         24576  3 hid_sensor_trigger,hid_sensor_iio_common,hid_sensor_als
snd_sof_pci            24576  0
coretemp               20480  0
snd_sof_intel_byt      20480  1 snd_sof_pci
intel_ishtp_loader     24576  0
snd_sof_intel_ipc      20480  1 snd_sof_intel_byt
joydev                 28672  0
kvm_intel             331776  0
snd_sof_intel_hda_common    81920  1 snd_sof_pci
intel_ishtp_hid        28672  0
mousedev               24576  0
snd_soc_hdac_hda       24576  1 snd_sof_intel_hda_common
snd_sof_xtensa_dsp     16384  2 snd_sof_intel_hda_common,snd_sof_intel_byt
snd_sof_intel_hda      20480  1 snd_sof_intel_hda_common
cros_ec_ishtp          20480  0
kvm                   831488  1 kvm_intel
cros_ec                20480  1 cros_ec_ishtp
snd_sof               131072  4 snd_sof_pci,snd_sof_intel_hda_common,snd_sof_intel_byt,snd_sof_intel_ipc
hid_multitouch         32768  0
iTCO_wdt               16384  0
iTCO_vendor_support    16384  1 iTCO_wdt
hid_generic            16384  0
mei_hdcp               24576  0
mei_wdt                16384  0
ledtrig_audio          16384  3 snd_hda_codec_generic,snd_hda_codec_realtek,snd_sof
intel_rapl_msr         20480  0
hp_wmi                 20480  0
irqbypass              16384  1 kvm
intel_wmi_thunderbolt    20480  0
sparse_keymap          16384  1 hp_wmi
wmi_bmof               16384  0
snd_soc_skl           180224  0
snd_soc_sst_ipc        20480  1 snd_soc_skl
snd_soc_sst_dsp        40960  1 snd_soc_skl
snd_hda_ext_core       36864  5 snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_soc_skl,snd_sof_intel_hda
snd_soc_acpi_intel_match    40960  3 snd_sof_pci,snd_sof_intel_hda_common,snd_soc_skl
snd_soc_acpi           16384  4 snd_soc_acpi_intel_match,snd_sof_intel_hda_common,snd_sof_intel_byt,snd_soc_skl
crct10dif_pclmul       16384  1
crc32_pclmul           16384  0
ghash_clmulni_intel    16384  0
snd_soc_core          299008  6 snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_soc_skl,snd_soc_dmic
iwlmvm                458752  0
aesni_intel           368640  7
crypto_simd            16384  1 aesni_intel
cryptd                 24576  3 crypto_simd,ghash_clmulni_intel
snd_compress           28672  1 snd_soc_core
glue_helper            16384  1 aesni_intel
ac97_bus               16384  1 snd_soc_core
snd_pcm_dmaengine      16384  1 snd_soc_core
nls_iso8859_1          16384  1
snd_hda_intel          57344  0
nls_cp437              20480  1
intel_cstate           16384  0
intel_uncore          147456  0
vfat                   24576  1
snd_intel_dspcfg       28672  4 snd_hda_intel,snd_sof_pci,snd_sof_intel_hda_common,snd_soc_skl
mac80211             1028096  1 iwlmvm
fat                    86016  1 vfat
intel_rapl_perf        16384  0
snd_hda_codec         167936  5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda
libarc4                16384  1 mac80211
snd_hda_core          106496  11 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_soc_skl,snd_sof_intel_hda
pcspkr                 16384  0
snd_hwdep              16384  1 snd_hda_codec
i915                 2519040  33
psmouse               184320  0
input_leds             16384  0
iwlwifi               413696  1 iwlmvm
snd_pcm               147456  10 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine
e1000e                299008  0
snd_timer              45056  3 snd_seq,snd_hrtimer,snd_pcm
snd                   114688  14 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm
i2c_i801               36864  0
soundcore              16384  1 snd
i2c_algo_bit           16384  1 i915
cfg80211              888832  3 iwlmvm,iwlwifi,mac80211
drm_kms_helper        249856  1 i915
cec                    69632  2 drm_kms_helper,i915
thunderbolt           245760  0
rc_core                57344  1 cec
intel_gtt              24576  1 i915
syscopyarea            16384  1 drm_kms_helper
mei_me                 49152  2
intel_lpss_pci         20480  0
sysfillrect            16384  1 drm_kms_helper
intel_lpss             16384  1 intel_lpss_pci
intel_ish_ipc          28672  0
processor_thermal_device    24576  0
sysimgblt              16384  1 drm_kms_helper
mei                   126976  5 mei_wdt,mei_hdcp,mei_me
rfkill                 28672  9 hp_wmi,bluetooth,cfg80211
idma64                 20480  0
intel_ishtp            61440  4 cros_ec_ishtp,intel_ishtp_hid,intel_ish_ipc,intel_ishtp_loader
intel_rapl_common      32768  2 intel_rapl_msr,processor_thermal_device
fb_sys_fops            16384  1 drm_kms_helper
intel_pch_thermal      16384  0
intel_soc_dts_iosf     20480  1 processor_thermal_device
ucsi_acpi              16384  0
i2c_hid                32768  0
typec_ucsi             36864  1 ucsi_acpi
typec                  53248  1 typec_ucsi
tpm_crb                20480  0
int3403_thermal        16384  0
hid                   143360  6 i2c_hid,usbhid,hid_multitouch,hid_sensor_hub,intel_ishtp_hid,hid_generic
wmi                    36864  3 hp_wmi,intel_wmi_thunderbolt,wmi_bmof
battery                20480  0
int340x_thermal_zone    16384  2 int3403_thermal,processor_thermal_device
tpm_tis                16384  0
ac                     16384  0
evdev                  28672  25
tpm_tis_core           32768  1 tpm_tis
mac_hid                16384  0
tpm                    77824  3 tpm_tis,tpm_crb,tpm_tis_core
int3400_thermal        20480  0
acpi_thermal_rel       16384  1 int3400_thermal
rng_core               16384  1 tpm
hp_wireless            16384  0
drm                   573440  13 drm_kms_helper,i915
uinput                 20480  0
sg                     40960  0
crypto_user            16384  0
agpgart                53248  2 intel_gtt,drm
ip_tables              36864  0
x_tables               53248  1 ip_tables
ext4                  798720  1
crc32c_generic         16384  0
crc16                  16384  2 bluetooth,ext4
mbcache                16384  1 ext4
jbd2                  139264  1 ext4
serio_raw              20480  0
atkbd                  36864  0
libps2                 20480  2 atkbd,psmouse
xhci_pci               20480  0
crc32c_intel           24576  2
xhci_hcd              286720  1 xhci_pci
i8042                  32768  0
serio                  28672  9 serio_raw,atkbd,psmouse,i8042

The module snd_hda_intel is beeing loaded.

Can you post inxi -Fzxxa ?

Sure! There it is:

System:    Host: KOM22151 Kernel: 5.6.16-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0 
           parameters: BOOT_IMAGE=/boot/vmlinuz-5.6-x86_64 root=UUID=00a334e8-9b76-4676-a3b6-b9d1a218dcec rw quiet apparmor=1 
           security=apparmor udev.log_priority=3 
           Desktop: KDE Plasma 5.18.5 tk: Qt 5.15.0 wm: kwin_x11 dm: SDDM Distro: Manjaro Linux 
Machine:   Type: Laptop System: HP product: HP EliteBook 840 G6 v: N/A serial: <filter> Chassis: type: 10 serial: <filter> 
           Mobo: HP model: 8549 v: KBC Version 52.5F.00 serial: <filter> UEFI: HP v: R70 Ver. 01.05.03 date: 04/27/2020 
Battery:   ID-1: BAT0 charge: 49.5 Wh condition: 49.5/49.5 Wh (100%) volts: 13.1/11.6 model: Hewlett-Packard Primary 
           serial: <filter> status: Full 
CPU:       Topology: Quad Core model: Intel Core i5-8265U bits: 64 type: MT MCP arch: Kaby Lake family: 6 model-id: 8E (142) 
           stepping: C (12) microcode: CA L2 cache: 6144 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 28808 
           Speed: 1901 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 1900 2: 1900 3: 1900 4: 1900 5: 1900 6: 1900 7: 1900 
           8: 1900 
           Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages 
           Type: l1tf status: Not affected 
           Type: mds status: Not affected 
           Type: meltdown status: Not affected 
           Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl and seccomp 
           Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization 
           Type: spectre_v2 mitigation: Enhanced IBRS, IBPB: conditional, RSB filling 
           Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: Intel UHD Graphics 620 vendor: Hewlett-Packard driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:3ea0 
           Display: x11 server: X.Org 1.20.8 driver: intel unloaded: modesetting alternate: fbdev,vesa compositor: kwin_x11 
           resolution: 1680x1050~60Hz, 1680x1050~60Hz 
           OpenGL: renderer: Mesa Intel UHD Graphics 620 (WHL GT2) v: 4.6 Mesa 20.0.7 direct render: Yes 
Audio:     Device-1: Intel Cannon Point-LP High Definition Audio vendor: Hewlett-Packard driver: sof-audio-pci bus ID: 00:1f.3 
           chip ID: 8086:9dc8 
           Sound Server: ALSA v: k5.6.16-1-MANJARO 
Network:   Device-1: Intel Cannon Point-LP CNVi [Wireless-AC] driver: iwlwifi v: kernel port: 3000 bus ID: 00:14.3 
           chip ID: 8086:9df0 
           IF: wlp0s20f3 state: up mac: <filter> 
           Device-2: Intel Ethernet I219-V vendor: Hewlett-Packard driver: e1000e v: 3.2.6-k port: efa0 bus ID: 00:1f.6 
           chip ID: 8086:15be 
           IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: <filter> 
Drives:    Local Storage: total: 238.47 GiB used: 125.15 GiB (52.5%) 
           ID-1: /dev/nvme0n1 vendor: Western Digital model: PC SN520 SDAPNUW-256G-1006 size: 238.47 GiB block size: 
           physical: 512 B logical: 512 B speed: 15.8 Gb/s lanes: 2 serial: <filter> 
Partition: ID-1: / raw size: 238.17 GiB size: 233.43 GiB (98.01%) used: 125.11 GiB (53.6%) fs: ext4 dev: /dev/nvme0n1p2 
Sensors:   System Temperatures: cpu: 51.0 C mobo: 50.0 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 232 Uptime: 19h 30m Memory: 15.45 GiB used: 2.41 GiB (15.6%) Init: systemd v: 245 Compilers: gcc: 10.1.0 
           Shell: bash v: 5.0.17 running in: konsole inxi: 3.0.37

Can you test kernel 5.7.xx ?

Just installed 5.7.0-3 through Manjaro kernel manager and rebooted the laptop. Didn't make any difference in the behavior. Should I install something else?

According to the following side, this sound chips should work:

Following the instructions over there, I made the hardware probe here: https://linux-hardware.org/?probe=2aa344c383. But I don't know hot to move on from here...

this is in error

[    3.836353] sof-audio-pci 0000:00:1f.3: Direct firmware load for intel/sof/sof-cnl.ri failed with error -2
[    3.836355] sof-audio-pci 0000:00:1f.3: error: request firmware intel/sof/sof-cnl.ri failed err: -2
[    3.836356] sof-audio-pci 0000:00:1f.3: error: failed to load DSP firmware -2

Firmware failure? This is new for me... My BIOS is completely updated - I did a complete update yesterday before posting here at the forum. Should I try a downgrade?

no this is coming from intel & linux & firmware ...

sudo pacman -Qs firmware
local/alsa-firmware 1.2.1-2
    Firmware binaries for laoder programs in alsa-tools and hotplug firmware
    loader
local/fwupd 1.4.4-1
    Simple daemon to allow session software to update firmware
local/linux-firmware 20200702.r1665.74ac3b5-1
    Firmware files for Linux (Manjaro Overlay Package)

Now I got stuck on this. Any hint on the next steps?

bug report
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/log/?qt=grep&q=DSP
no more DSP since 2018 ...

From where do you have the dmesg time index 3.836353 ?

I have news. I'm running Ubuntu in a LiveUSB and voila, sound is there. Some commands:

aplay -l

card 0: sofhdadsp [sof-hda-dsp], device 0: HDA Analog (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: sofhdadsp [sof-hda-dsp], device 1: HDA Digital (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: sofhdadsp [sof-hda-dsp], device 3: HDMI1 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: sofhdadsp [sof-hda-dsp], device 4: HDMI2 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: sofhdadsp [sof-hda-dsp], device 5: HDMI3 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

cat /proc/asound/cards

0 [sofhdadsp      ]: sof-hda-dsp - sof-hda-dsp
                      HP-HPEliteBook840G6--8549

lsmod

Module                  Size  Used by
rfcomm                 81920  4
cmac                   16384  3
algif_hash             16384  1
algif_skcipher         16384  1
af_alg                 24576  6 algif_hash,algif_skcipher
bnep                   24576  2
zfs                  4030464  6
zunicode              331776  1 zfs
zavl                   16384  1 zfs
icp                   286720  1 zfs
zcommon                90112  2 zfs,icp
znvpair                81920  2 zfs,zcommon
spl                   126976  5 zfs,icp,znvpair,zcommon,zavl
zlua                  147456  1 zfs
snd_soc_skl_hda_dsp    24576  5
snd_hda_codec_hdmi     61440  1
snd_soc_hdac_hdmi      36864  1 snd_soc_skl_hda_dsp
snd_hda_codec_realtek   118784  1
snd_hda_codec_generic    81920  1 snd_hda_codec_realtek
snd_soc_dmic           16384  1
snd_sof_pci            20480  0
snd_sof_intel_hda_common    69632  1 snd_sof_pci
snd_soc_hdac_hda       24576  1 snd_sof_intel_hda_common
snd_sof_intel_hda      20480  1 snd_sof_intel_hda_common
snd_sof_intel_byt      20480  1 snd_sof_pci
snd_sof_intel_ipc      20480  1 snd_sof_intel_byt
snd_sof               106496  4 snd_sof_pci,snd_sof_intel_hda_common,snd_sof_intel_byt,snd_sof_intel_ipc
snd_sof_xtensa_dsp     16384  1 snd_sof_pci
snd_hda_ext_core       28672  4 snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_intel_hda
snd_soc_acpi_intel_match    32768  2 snd_sof_pci,snd_sof_intel_hda_common
snd_soc_acpi           16384  2 snd_sof_pci,snd_soc_acpi_intel_match
ledtrig_audio          16384  3 snd_hda_codec_generic,snd_hda_codec_realtek,snd_sof
snd_soc_core          245760  6 snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_soc_dmic,snd_soc_skl_hda_dsp
snd_compress           24576  1 snd_soc_core
ac97_bus               16384  1 snd_soc_core
snd_pcm_dmaengine      16384  1 snd_soc_core
snd_hda_intel          53248  0
snd_intel_dspcfg       24576  3 snd_hda_intel,snd_sof_pci,snd_sof_intel_hda_common
snd_hda_codec         131072  6 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda,snd_soc_skl_hda_dsp
snd_hda_core           90112  11 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_intel_hda,snd_soc_skl_hda_dsp
snd_hwdep              20480  1 snd_hda_codec
snd_pcm               106496  9 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_core,snd_hda_core,snd_pcm_dmaengine
snd_seq_midi           20480  0
snd_seq_midi_event     16384  1 snd_seq_midi
mei_hdcp               24576  0
intel_rapl_msr         20480  0
snd_rawmidi            36864  1 snd_seq_midi
iwlmvm                380928  0
x86_pkg_temp_thermal    20480  0
intel_powerclamp       20480  0
coretemp               20480  0
mac80211              843776  1 iwlmvm
kvm_intel             286720  0
snd_seq                69632  2 snd_seq_midi,snd_seq_midi_event
snd_seq_device         16384  3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer              36864  2 snd_seq,snd_pcm
libarc4                16384  1 mac80211
kvm                   663552  1 kvm_intel
intel_cstate           20480  0
intel_rapl_perf        20480  0
joydev                 24576  0
hid_sensor_als         20480  1
intel_wmi_thunderbolt    20480  0
btusb                  57344  0
hp_wmi                 16384  0
hid_sensor_trigger     20480  2 hid_sensor_als
btrtl                  24576  1 btusb
snd                    90112  24 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_soc_skl_hda_dsp,snd_rawmidi
sparse_keymap          16384  1 hp_wmi
industrialio_triggered_buffer    16384  1 hid_sensor_als
btbcm                  16384  1 btusb
btintel                24576  1 btusb
serio_raw              20480  0
wmi_bmof               16384  0
kfifo_buf              16384  1 industrialio_triggered_buffer
iwlwifi               331776  1 iwlmvm
uvcvideo               98304  0
bluetooth             581632  31 btrtl,btintel,btbcm,bnep,btusb,rfcomm
soundcore              16384  1 snd
hid_sensor_iio_common    20480  2 hid_sensor_trigger,hid_sensor_als
videobuf2_vmalloc      20480  1 uvcvideo
videobuf2_memops       20480  1 videobuf2_vmalloc
industrialio           73728  5 industrialio_triggered_buffer,hid_sensor_trigger,kfifo_buf,hid_sensor_als
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_common       49152  2 videobuf2_v4l2,uvcvideo
input_leds             16384  0
videodev              225280  3 videobuf2_v4l2,uvcvideo,videobuf2_common
mei_me                 40960  1
processor_thermal_device    24576  0
mc                     53248  4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
intel_rapl_common      24576  2 intel_rapl_msr,processor_thermal_device
mei                   106496  3 mei_hdcp,mei_me
hid_multitouch         28672  0
cfg80211              704512  3 iwlmvm,iwlwifi,mac80211
ecdh_generic           16384  2 bluetooth
ecc                    28672  1 ecdh_generic
cros_ec_ishtp          20480  0
intel_soc_dts_iosf     20480  1 processor_thermal_device
cros_ec                20480  1 cros_ec_ishtp
intel_pch_thermal      16384  0
ucsi_acpi              16384  0
typec_ucsi             40960  1 ucsi_acpi
typec                  45056  1 typec_ucsi
mac_hid                16384  0
int3403_thermal        16384  0
int340x_thermal_zone    16384  2 int3403_thermal,processor_thermal_device
acpi_pad              184320  0
int3400_thermal        20480  0
hp_wireless            16384  0
acpi_thermal_rel       16384  1 int3400_thermal
sch_fq_codel           20480  2
parport_pc             40960  0
ppdev                  24576  0
lp                     20480  0
parport                53248  3 parport_pc,lp,ppdev
ip_tables              32768  0
x_tables               40960  1 ip_tables
autofs4                45056  2
overlay               114688  1
nls_utf8               16384  1
isofs                  49152  1
nls_iso8859_1          16384  0
dm_mirror              24576  0
dm_region_hash         20480  1 dm_mirror
dm_log                 20480  2 dm_region_hash,dm_mirror
usbhid                 57344  0
hid_sensor_hub         24576  3 hid_sensor_trigger,hid_sensor_iio_common,hid_sensor_als
intel_ishtp_loader     24576  0
intel_ishtp_hid        24576  0
uas                    28672  0
usb_storage            77824  3 uas
crct10dif_pclmul       16384  1
hid_generic            16384  0
crc32_pclmul           16384  0
i915                 1986560  19
ghash_clmulni_intel    16384  0
aesni_intel           372736  4
i2c_algo_bit           16384  1 i915
crypto_simd            16384  1 aesni_intel
drm_kms_helper        184320  1 i915
syscopyarea            16384  1 drm_kms_helper
cryptd                 24576  3 crypto_simd,ghash_clmulni_intel
glue_helper            16384  1 aesni_intel
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
i2c_i801               32768  0
psmouse               155648  0
e1000e                258048  0
nvme                   49152  0
fb_sys_fops            16384  1 drm_kms_helper
i2c_hid                28672  0
drm                   491520  9 drm_kms_helper,i915
hid                   131072  6 i2c_hid,usbhid,hid_multitouch,hid_sensor_hub,intel_ishtp_hid,hid_generic
nvme_core             102400  1 nvme
intel_lpss_pci         20480  0
thunderbolt           167936  0
intel_lpss             16384  1 intel_lpss_pci
intel_ish_ipc          24576  0
idma64                 20480  0
virt_dma               20480  1 idma64
intel_ishtp            49152  4 cros_ec_ishtp,intel_ishtp_hid,intel_ish_ipc,intel_ishtp_loader
wmi                    32768  3 hp_wmi,intel_wmi_thunderbolt,wmi_bmof
pinctrl_cannonlake     36864  1
video                  49152  1 i915
pinctrl_intel          28672  1 pinctrl_cannonlake

From this, would you have any tip for making sound work on Manjaro KDE?

HP 'specifications' for laptop are not very informative, but does have one clue:

support.hp.com - hp-elitebook-840-g6-notebook-pc
Multi-array microphone (integrated)
Integrated stereo speakers

multi-array microphone will be IntelSST DMIC array, which is not supported by the usual snd_hda_intel driver
ALSA cannot detect the dmic correctly and reports 'no devices detected'
and if Pulseaudio cannot detect any ALSA devices for playback, it creates the Dummy Device

simple way to get audio working is to disable detection of the internal dmic to allow the rest of the audio codec to work with snd_hda_intel driver
use this command to add kernel option for audio:
echo 'options snd-intel-dspcfg dsp_driver=1' | sudo tee etc/modprobe.d/alsa-base.conf

once it can be confirmed that the audio codec works without internal dmic, user can try to enable the internal dmic (and load new driver sof-hda_dsp to support it) by changing the kernel option to
options snd-intel-dspcfg dsp_driver=3
but not all systems can support the new driver yet so this may not work for your system yet

echo 'options snd-intel-dspcfg dsp_driver=1' | sudo tee etc/modprobe.d/alsa-base.conf is returning the following:

tee: etc/modprobe.d/alsa-base.conf: Datei oder Verzeichnis nicht gefunden
options snd-intel-dspcfg dsp_driver=1

There is no alsa-base.conf. Should I simply create the file and add the line options snd-intel-dspcfg dsp_driver=1 to it?

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