Hello, I have the same problem (KDE doesn’t see any audio output or input), I have tried quite every solution I have found around.
Your suggestion made me find the first error message, so maybe this is the way to find the right solution. What should I do now?
$ systemctl --user status pipewire-media-session.service
● pipewire-media-session.service - Multimedia Service Session Manager
Loaded: loaded (/usr/lib/systemd/user/pipewire-media-session.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2021-03-22 13:22:32 CET; 809ms ago
Process: 16325 ExecStart=/usr/bin/pipewire-media-session (code=exited, status=161)
Main PID: 16325 (code=exited, status=161)
mar 22 13:22:32 manjaro-su systemd[1327]: pipewire-media-session.service: Scheduled restart job, restart counter is at 5.
mar 22 13:22:32 manjaro-su systemd[1327]: Stopped Multimedia Service Session Manager.
mar 22 13:22:32 manjaro-su systemd[1327]: pipewire-media-session.service: Start request repeated too quickly.
mar 22 13:22:32 manjaro-su systemd[1327]: pipewire-media-session.service: Failed with result 'exit-code'.
mar 22 13:22:32 manjaro-su systemd[1327]: Failed to start Multimedia Service Session Manager.
More info:
$ pactl info
Server String: /run/user/1001/pulse/native
Library Protocol Version: 34
Server Protocol Version: 34
Is Local: yes
Client Index: 30
Tile Size: 65472
User Name: system
Host Name: manjaro-su
Server Name: PulseAudio (on PipeWire 0.3.23)
Server Version: 14.0.0
Default Sample Specification: float32le 2ch 48000Hz
Default Channel Map: front-left,front-right
Default Sink: @DEFAULT_SINK@
Default Source: @DEFAULT_SOURCE@
Cookie: 1320:66c4
$ systemctl --user status pipewire.service
● pipewire.service - Multimedia Service
Loaded: loaded (/usr/lib/systemd/user/pipewire.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2021-03-22 13:05:05 CET; 1min 21s ago
TriggeredBy: ● pipewire.socket
Main PID: 9498 (pipewire)
CGroup: /user.slice/user-1001.slice/user@1001.service/session.slice/pipewire.service
└─9498 /usr/bin/pipewire
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Generic [HD-Audio Generic], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic_1 [HD-Audio Generic], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic_1 [HD-Audio Generic], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0