Yes this bug affects all ubuntu releases since at least 13.04
No I haven't found a solution yet. This was the best I came up with. You can
try to increase the default-fragments number but that will increase latency. A
number of 5 is a compromise between latency and probability of crash.
I suggest
I think I found a way to at least minimize this issue. From the
pulseaudio logs I found that for the AC3 plugin it isn't using the
default fragment settings from /etc/pulse/daemon.conf which are:
default-fragments = 8
default-fragment-size-msec = 10
Instead it adjusts to the nearest latency with
I added this to the a52.conf file located in
/us/share/alsa/alsa.conf.d/a52.conf:
ctl.a52 {
@args [ CARD ]
@args.CARD {
type string
default 0
}
type hw
card $CARD
}
And now I get this from pulseaudio:
I: [pulseaudio] alsa-si
Thanks for giving attention to my problem.
The hardware decoder is integrated in the logitech Z-5500 speakers. I
don't have knowledge of any specific limit on the amount of data. There
is however information regarding a maximum hw buffer size on the
pulseaudio logs:
D: [pulseaudio] alsa-util.c: T
This also appears in the logs at least once:
D: [alsa-sink-] protocol-native.c: Requesting rewind due to end of underrun.
D: [alsa-sink-] protocol-native.c: Requesting rewind due to end of underrun.
D: [alsa-sink-] protocol-native.c: Requesting rewind due to end of underrun.
D: [alsa-sink-] sink-i
Updated alsa-lib and alsa-plugins to latest version 1.0.27.
Unfortunately the a52 plugin makes pulseaudio crash immediately. Had to
compile the alsa-plugins against libav 9 instead of libav 0.8.6 (that
comes with raring) to make it work! Unfortunately the problem with audio
breaking up persists. Th
This is the pulseadio log where you can see the dca alsa plugin doing
it's job. There is no registry of audio breaks!
** Attachment added: "pulseaudio log with dca alsa plugin"
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1188425/+attachment/3696819/+files/pulse_20130606.7z
--
Public bug reported:
I am encoding all audio in AC3 and sending it to my Logitech Z-5500
speakers through the SPDIF out jack on my laptop. Audio works fine for a
while until it breaks up randomly and pulseaudio eventually crashes. By
looking to the pulseaudio logs one can see some buffer underruns
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