I have installed XFCE 20.2.1 on my Lenovo ThinkPad X13, and have no sound output. In PulseAudio Volume Control I see the following:
System Sounds: 100%
Firefox: Audiostream: 100%
Output Devices tab:
Dummy Output: Approx. 80%
I have updated the kernel from 5.9.16-1, to 5.10.2-2, and restarted the laptop, this does not restore sound. I would be grateful of some help to restore sound, thank you.