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.
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https://bugs.launchpad.net/bugs/1875665
Title:
rtkit-daemon[*]: Failed to make ourselves RT: Operation not permitted
after upgrade to 20.04
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