Great insight there about RLIMIT_RTTIME.
It appears that yes indeed pulseaudio is unique in that it has a self-
imposed RLIMIT_RTTIME of 200000 microseconds. That is also configured in
/etc/pulse/daemon.conf:
; rlimit-rttime = 200000
Normal processes have no such limit.
It appears you should sometimes get error messages in the pulseaudio log
somewhere along the lines of:
Soft CPU time limit exhausted, terminating.
Hard CPU time limit exhausted, terminating forcibly.
but certainly if the hard limit is exceeded quickly then you might see
neither of those.
Next...
1. Please send more system information by running:
apport-collect 1783200
or by at least sending us the CPU model details, kernel version, and output
from `lspci -k`.
2. Report a bug to PulseAudio here:
https://bugs.freedesktop.org/enter_bug.cgi?product=PulseAudio
and tell us the new bug ID.
** Changed in: pulseaudio (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1783200
Title:
[Lenovo Miix 310, Ubuntu 18.04] Audio no longer working
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