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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Touch seeded packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1783200
Title:
[Lenovo Miix 310, Ubuntu 18.04] Audio no longer working
Status in pulseaudio package in Ubuntu:
Incomplete
Bug description:
I believe this is a pulseaudio regression, as the output of alsa-info
(http://www.alsa-
project.org/db/?f=730ab5b8f0499ef58c0e17f67f8f911ba53a011c) looks fine
as far as I can see.
I'm currently running Ubuntu 18.04, and I believe this is a regression
as audio used to work under 17.10. Since upgrading (which fixed a good
number of other incompatibilities with the machine), I've had no luck
getting audio to work at all.
I'm attaching the output of dmesg, 'aplay -l', 'aplay -L' and
'pulseaudio -vv'.
If I can provide any other information, or if there's anything you'd
like me to try, I'd be happy to help in any way possible.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1783200/+subscriptions
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