Audio qube

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I’ve updated the script, since it was error-prone and with updated script you don’t need to specify the attached USB devices:

Disable sys-audio autostart.
Run these commands in dom0:

sudo mkdir /etc/libvirt/hooks/
cat << 'EOF' | sudo tee /etc/libvirt/hooks/libxl >/dev/null
#!/bin/bash
guest_name="$1"
libvirt_operation="$2"
timeout=60
guest_to_start_on_usb="sys-audio"

if [ "$guest_name" = "sys-usb" ] && [ "$libvirt_operation" = "started" ]; then
    (
        exec 0</dev/null
        exec 1>/dev/null
        exec 2>/dev/null
        guest_attached_usb_list=$(qvm-usb list "$guest_to_start_on_usb" | awk '{ print $1 }')
        for i in $(seq 1 $timeout);
        do
            if qvm-ls --running $guest_name | grep -q Running; then
                present_usb_list=$(qvm-usb list | grep -w "$guest_to_start_on_usb" | awk '{ print $1 }')
                if  [ "$guest_attached_usb_list" = "$present_usb_list" ]; then
                    qvm-start --skip-if-running -q $guest_to_start_on_usb
                    break
                fi
            fi
            sleep 1
        done
    ) & disown
fi
EOF
sudo chmod +x /etc/libvirt/hooks/libxl

Reboot.

Related issue:
Require sys-usb to start before starting qubes with persistently attached USB devices · Issue #7498 · QubesOS/qubes-issues · GitHub

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