How to debug detected absence of audio peripheral?

Sometimes, when I resume my computer from sleep, it doesn't detect the audio peripherals (that it otherwise manages just fine).

At first, I didn't know what to do, so I had to restart it and it would work.
Now, I've done the smart thing of looking up the troubleshooting procedure, and the first solution

killall pulseaudio; rm -r ~/.config/pulse/* ; rm -r ~/.pulse*

works great.

However, I don't want to keep doing this, so I'd like to gather more info and try to solve the issue.

What commands would be the most interesting to gather information?

A bit of background from alsa-info (please tell if you really need the whole output)

upload=true&script=true&cardinfo=
!!################################
!!ALSA Information Script v 0.4.65
!!################################

!!Script ran on: Fri Jul 17 20:33:14 UTC 2020

!!Linux Distribution
!!------------------

Ubuntu 20.04 LTS (cut out redudant info)

!!DMI Information
!!---------------

Manufacturer: LENOVO
Product Name: 81LK
Product Version: IdeaPad L340-15IRH Gaming
Firmware Version: BGCN29WW
Board Vendor: LENOVO
Board Name: LNVNB161216

!!Kernel Information
!!------------------

Kernel release: 5.4.0-40-generic
Operating System: GNU/Linux
Architecture: x86_64
Processor: x86_64
SMP Enabled: Yes

!!ALSA Version
!!------------

Driver version: k5.4.0-40-generic
Library version: 1.2.2
Utilities version: 1.2.2

!!Loaded ALSA modules
!!-------------------

snd_hda_intel

!!Sound Servers on this system
!!----------------------------

Pulseaudio:
      Installed - Yes (/usr/bin/pulseaudio)
      Running - Yes

!!Soundcards recognised by ALSA
!!-----------------------------

 0 [PCH ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xa4718000 irq 141

!!PCI Soundcards installed in the system
!!--------------------------------------

00:1f.3 Audio device [0403]: Intel Corporation Cannon Lake PCH cAVS [8086:a348] (rev 10) (prog-if 80)
 Subsystem: Lenovo Cannon Lake PCH cAVS [17aa:3815]