Sound not working after to install manjaro KDE Plasma 20.1

Hello, install manjaro kde plasma 20.1 and the audio does not work, at the beginning I got a message of “no input or output devices found”, place the commands: guiding me fromhttps://forum.manjaro.org/t/fresh-manjaro-kde-install-no-sound-card-detected/21531/27

pulseaudio --start
pulseaudio -k
pulseaudio --start

Then the following devices appeared:
HDMI1 / DP1 Output (sof-hda-dsp HDMI1 / DP1 Output)
HDMI2 / DP2 Output (sof-hda-dsp HDMI2 / DP2 Output)
HDMI3 / DP3 Output (sof-hda-dsp HDMI3 / DP3 Output)
Speaker (sof-hda-dsp speaker + Headphones)
Headset mono microphone (sof-hda-dsp Headset mono microphone)

I leave the info of my system:

 System:    Kernel: 5.8.6-1-MANJARO x86_64 bits: 64 compiler: N/A 
            parameters: BOOT_IMAGE=/boot/vmlinuz-5.8-x86_64 root=UUID=415b645f-4920-4501-b2f1-e5aea1ebcd74 rw quiet apparmor=1 
            security=apparmor udev.log_priority=3 
            Desktop: KDE Plasma 5.19.5 tk: Qt 5.15.0 wm: kwin_x11 dm: SDDM Distro: Manjaro Linux 
Machine:   Type: Convertible System: Dell product: Inspiron 5591 2n1 v: N/A serial: <filter> Chassis: type: 31 
            serial: <filter> 
            Mobo: Dell model: 0208H1 v: A00 serial: <filter> UEFI: Dell v: 1.5.0 date: 02/04/2020 
Battery:   ID-1: BAT0 charge: 42.0 Wh condition: 42.0/42.0 Wh (100%) volts: 13.0/11.4 model: LGC-LGC3.65 DELL FDRHM06 
            type: Li-ion serial: <filter> status: Full 
            Device-1: hid-0018:04F3:2854.0002-battery model: CUST0000:00 04F3:2854 serial: N/A charge: N/A status: N/A 
CPU:       Topology: Quad Core model: Intel Core i5-10210U bits: 64 type: MT MCP arch: Kaby Lake family: 6 model-id: 8E (142) 
            stepping: C (12) microcode: D6 L2 cache: 6144 KiB 
            flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 33615 
            Speed: 800 MHz min/max: 400/4200 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 800 8: 800 
            Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled 
            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: srbds mitigation: TSX disabled 
            Type: tsx_async_abort status: Not affected 
Graphics:  Device-1: Intel UHD Graphics vendor: Dell driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:9b41 
            Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo bus ID: 1-6:3 chip ID: 0bda:5521 serial: <filter> 
            Display: x11 server: xorg 1.20.8 compositor: kwin_x11 driver: intel unloaded: modesetting alternate: fbdev,vesa 
            display ID: :0 screens: 1 
            Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") s-diag: 582mm (22.9") 
            Monitor-1: eDP1 res: 1920x1080 hz: 60 dpi: 143 size: 340x190mm (13.4x7.5") diag: 389mm (15.3") 
            OpenGL: renderer: N/A v: N/A direct render: N/A 
Audio:     Device-1: Intel vendor: Dell driver: sof-audio-pci alternate: snd_hda_intel,snd_soc_skl,snd_sof_pci bus ID: 00:1f.3 
            chip ID: 8086:02c8 
            Sound Server: ALSA v: k5.8.6-1-MANJARO 
Network:   Device-1: Intel Wireless-AC 9462 driver: iwlwifi v: kernel port: 3000 bus ID: 00:14.3 chip ID: 8086:02f0 
            IF: wlp0s20f3 state: up mac: <filter> 
Drives:    Local Storage: total: 238.47 GiB used: 9.08 GiB (3.8%) 
            SMART Message: Unable to run smartctl. Root privileges required. 
            ID-1: /dev/nvme0n1 model: PC SN530 NVMe WDC 256GB size: 238.47 GiB block size: physical: 512 B logical: 512 B 
            speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: 21106012 scheme: GPT 
Partition: ID-1: / raw size: 238.17 GiB size: 233.43 GiB (98.01%) used: 9.08 GiB (3.9%) fs: ext4 dev: /dev/nvme0n1p2 
Swap:      Alert: No Swap data was found. 
Sensors:   System Temperatures: cpu: 44.0 C mobo: N/A 
            Fan Speeds (RPM): cpu: 2521 
Info:      Processes: 239 Uptime: 1h 01m Memory: 7.44 GiB used: 2.51 GiB (33.8%) Init: systemd v: 246 Compilers: gcc: 10.2.0 
            Packages: pacman: 1174 lib: 305 flatpak: 0 Shell: Bash v: 5.0.18 running in: konsole inxi: 3.1.05

and ALSA information http://alsa-project.org/db/?f=70e4f73b117a4a17388658089fd75bd60635f9ba

status pulseaudio:

systemctl --user status pulseaudio.service
● pulseaudio.service - Sound Service
     Loaded: loaded (/usr/lib/systemd/user/pulseaudio.service; disabled; vendor preset: enabled)
     Active: active (running) since Thu 2020-09-17 13:22:23 -05; 54min ago
TriggeredBy: 
● pulseaudio.socket
   Main PID: 4238 (pulseaudio)
     CGroup: /user.slice/user-1000.slice/user@1000.service/pulseaudio.service
             ├─4238 /usr/bin/pulseaudio --daemonize=no
             └─4254 /usr/lib/pulse/gsettings-helper
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.
set 17 13:55:08 dell-inspiron pulseaudio[4238]: W: [pulseaudio] sink-input.c: Failed to create sink input: sink is suspended.

please if someone can help me :c thanks

Hello,

If i’m not mistaken you will need to install the sof-firmware package. That includes the the new sof-hda-dsp driver, same as described here for a different Inspiron model:
https://wiki.archlinux.org/index.php/Dell_Inspiron_15_(7590)#Audio

This command should remove suspend from all sinks and sources

pacmd suspend 0

Audio sinks and sources in Pulseaudio can become hard suspended if direct commands to pulseaudio are used (pulseaudio --kill and pulseaudio --start already mentioned)

On Manjaro, Pulseaudio should be restarted via the systemd service:

systemctl --user restart pulseaudio.service

Hi, did you fix this? It is exactly the same as mine : /