Comment 7 for bug 1875665

I have the same issue, 18.04 -> 20.04 via upgrade. RTKit now failing to give pulseaudio RT priority.

Issue resulting is some choppy audio - under heavy load. Pulseaudio not RT priority

20.04 clean install:
    PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
    795 twiggy 9 -11 1146096 18528 14632 S 0.0 0.9 0:00.56 pulseaudio

18.04->20.04 upgraded:
    PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 259018 twiggy2 20 0 280064 14228 12452 S 0.0 0.0 0:00.43 pulseaudio

Haven't yet found an app that crashes when it failes to acquire RT, but, audio not behaving to previous good standard.