No sound on laptop

[alpreston]

The sound on my laptop initially worked fine, but recently, sometime after updating the kernel but not immediately, sound output quit working.
machine info:
Operating System: Kubuntu 23.04
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.104.0
Kernel Version: 6.2.0-20-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-1135G7@ 2.4 Ghz.
Memory: 16 Gb
Graphics Processor: Mesa Intel® Xe Graphics
Manufacturer: Acer
Product Name: Aspire A315-58
Previous kernel: 5.19.0-40-generic (64-bit)

I've also noticed that pulse audio settings sometimes seems to forget the existence of the laptop's speaker/headphone output. I have tried reinstalling pulseaudio, but the problem persists.
The sound does work if I use the option to boot the previous kernel, which suggests a change in the newer kernal since it was updated, or a missing or corrupted file rather than a hardware problem.

[alpreston]

I've also booted from a live 23.04 USB stick and verified that there's no sound problem there.

[Oderus]

What is the output of :

aplay -l

[mcpent]

I have a similar problem.
Everything worked just fine out-of-the box since yesterday. Today if I play an audio or a video from different software, I can see the volume bar working, but I can't ear anything, like if the system couldn't pass the audio to the sound board. I use an external UMC404HD, I've connected it to an other cmoputer and the sound card works just fine.

I'm not sure If I updated the kernel or something else recently, and until yesterday, anyway, it was working.

My aplay -l output is the following:

**** Lista di PLAYBACK dispositivi hardware ****
scheda 0: NVidia [HDA NVidia], dispositivo 3: HDMI 0 [HDMI 0 *]
 Sottoperiferiche: 1/1
 Sottoperiferica #0: subdevice #0
scheda 0: NVidia [HDA NVidia], dispositivo 7: HDMI 1 [HDMI 1]
 Sottoperiferiche: 1/1
 Sottoperiferica #0: subdevice #0
scheda 0: NVidia [HDA NVidia], dispositivo 8: HDMI 2 [HDMI 2]
 Sottoperiferiche: 1/1
 Sottoperiferica #0: subdevice #0
scheda 0: NVidia [HDA NVidia], dispositivo 9: HDMI 3 [HDMI 3]
 Sottoperiferiche: 1/1
 Sottoperiferica #0: subdevice #0
scheda 1: U192k [UMC404HD 192k], dispositivo 0: USB Audio [USB Audio]
 Sottoperiferiche: 1/1
 Sottoperiferica #0: subdevice #0
scheda 2: Loopback [Loopback], dispositivo 0: Loopback PCM [Loopback PCM]
 Sottoperiferiche: 8/8
 Sottoperiferica #0: subdevice #0
 Sottoperiferica #1: subdevice #1
 Sottoperiferica #2: subdevice #2
 Sottoperiferica #3: subdevice #3
 Sottoperiferica #4: subdevice #4
 Sottoperiferica #5: subdevice #5
 Sottoperiferica #6: subdevice #6
 Sottoperiferica #7: subdevice #7
scheda 2: Loopback [Loopback], dispositivo 1: Loopback PCM [Loopback PCM]
 Sottoperiferiche: 8/8
 Sottoperiferica #0: subdevice #0
 Sottoperiferica #1: subdevice #1
 Sottoperiferica #2: subdevice #2
 Sottoperiferica #3: subdevice #3
 Sottoperiferica #4: subdevice #4
 Sottoperiferica #5: subdevice #5
 Sottoperiferica #6: subdevice #6
 Sottoperiferica #7: subdevice #7
​

I'm on Kubuntu 23.04 updated.
Kernel version I'm using is: 6.2.0-1003-lowlatency #3-Ubuntu SMP PREEMPT_DYNAMIC

And I'm using ALSA and Pipewire.

Thanks for any help.
Marco