[Dell System XPS L502X, Realtek ALC665, Speaker, Internal] fails after a while

[Daniel Cordeiro]

It worked fine before upgrading to 12.10

The sound stops after a while (but never during playback. If, for instance, I start to see a video the sound always works until the video ends). It stops for no apparent reason, I can't see a pattern to reproduce the problem.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: alsa-base 1.0.25+dfsg-0ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: danielc 1761 F.... pulseaudio
 /dev/snd/pcmC0D0c: danielc 1761 F...m pulseaudio
Date: Thu Oct 11 22:34:51 2012
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120822.4)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_Type: Sound works for a while, then breaks
Title: [Dell System XPS L502X, Realtek ALC665, Speaker, Internal] fails after a while
UpgradeStatus: Upgraded to quantal on 2012-10-06 (5 days ago)
dmi.bios.date: 05/04/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0NJT03
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd05/04/2011:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.

[Raymond (superquad-vortex2)]

the minimum period bytes of snd-hda-intel is 128

the minimum period time at 48000Hz for 2 channels 16 bits is about 0.66 ms , it is unlikely for pulse plugin to support latency 0.5 ms

Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [pulseaudio] protocol-native.c: Requested latency=0.00 ms, Received latency=0.50 ms
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [pulseaudio] memblockq.c: memblockq requested: maxlength=4194304, tlength=15552, base=8, prebuf=0, minreq=7680 maxrewind=0
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [pulseaudio] memblockq.c: memblockq sanitized: maxlength=4194304, tlength=15552, base=8, prebuf=0, minreq=7680 maxrewind=0
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [pulseaudio] protocol-native.c: Final latency 41.00 ms = 0.50 ms + 2*20.00 ms + 0.50 ms
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Cutting sleep time for the initial iterations by half.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Latency set to 0.50ms
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: hwbuf_unused=65440
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: setting avail_min=16373
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Requesting rewind due to latency change.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Requested to rewind 65536 bytes.m
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Limited to 65088 bytes.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: before: 16272
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: after: 16272
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Rewound 65088 bytes.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] sink.c: Processing rewind...
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] sink-input.c: Have to rewind 65088 bytes on render memblockq.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] source.c: Processing rewind...
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Cutting sleep time for the initial iterations by half.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [pulseaudio] module-stream-restore.c: Storing volume/mute/device for stream sink-input-by-application-id:org.VideoLAN.VLC.
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.452| 0.000) [alsa-sink] alsa-sink.c: Cutting sleep time for the initial iterations by half.
Oct 11 22:36:37 pulseaudio[1761]: last message repeated 4 times
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.453| 0.000) [alsa-sink] alsa-sink.c: Increasing minimal latency to 1.00 ms
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.453| 0.000) [alsa-sink] alsa-sink.c: Latency set to 1.00ms
Oct 11 22:36:37 varzea pulseaudio[1761]: ( 14.453| 0.000) [alsa-sink] alsa-sink.c: hwbuf_unused=65344
Oct 11 22:36:37...