Fixing "no sound after suspending" error for Linux Mint on Xiaomi Notebook 15 pro

fix-no-sound-after-suspending-mint.md

Fast checking

After suspending (when your system cannot play any sounds) try to execute in your terminal (after sudo su):

$ lspci -D | grep -i Audio | awk '{print $1}'

And then:

$ echo 1 > /sys/bus/pci/devices/<device_address>/remove
$ sleep 1
$ echo 1 > /sys/bus/pci/rescan

If all works fine, automate it

Create new file: /lib/systemd/system-sleep/99_restart_sound and insert the following source code:

#!/bin/sh
  
case "$1" in
    post)
        DEVICE_ID=`lspci -D | grep -i Audio | awk '{print $1}'`
        echo 1 > /sys/bus/pci/devices/${DEVICE_ID}/remove
        sleep 1
        echo 1 > /sys/bus/pci/rescan
esac

The file must be executable:

$ sudo chmod +x /lib/systemd/system-sleep/99_restart_sound

Solution source: https://askubuntu.com/a/1293238