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[Rkfg <1315212@xxxxxxxxxxxxxxxxxx>]

This command doesn't work, it says "aplay: set_params:1239: Channels
count non available". The -D default:CARD=CA0106 variant works and it
does not overrun. I only had overruns on recording (at least, explicit).
That said, I've made a huge improvement in my system, I compiled a pf-
kernel and set CONFIG_PREEMPT=y, CONFIG_HZ_1000=y and CONFIG_HZ=1000.
The default Debian kernel is on 250 Hz and is not preemptible. Now that
my kernel supports preemption I (crossing fingers) don't have ALSA over-
and underruns anymore. They were quite sudden and audible as
clicks/gaps. I saw this in the log:

Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Scheduling delay of 11.42 ms > 11.31 ms, you might want to investigate this to improve latency...
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Underrun!
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Increasing minimal latency to 1.00 ms
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Latency set to 21.33ms
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: hwbuf_unused=57352
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: setting avail_min=7651
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Latency set to 21.33ms
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: hwbuf_unused=57352
Jan  4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: setting avail_min=7651

With the preempt kernel this doesn't happen at all (I grepped the log)
and sound is just as good as with pure ALSA.

However, arecord still drops overrun for CA0106. It doesn't do it for
PCH (ALC889) though.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1315212

Title:
  [CA0106 - CA0106, playback] Playback problem - Surround dies, no valid
  output

Status in ALSA driver:
  Confirmed
Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  This is tested against a Creative Labs Sounblaster live! (sb0410) card
  and a SoundBlaster Audigy se (sb0570). Both of them behave strangely,
  output coming through some, but not all speakers, etc. This was
  working in 13.10 under the sb0410. the ca0106 driver is the same for
  both cards.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic i686
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  joshp     30385 F.... pulseaudio
   /dev/snd/controlC0:  joshp     30385 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu May  1 21:37:12 2014
  InstallationDate: Installed on 2014-04-28 (3 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:CA0106 failed
  Symptom_Card: Built-in Audio - Intel ICH6
  Symptom_Type: None of the above
  Title: [CA0106 - CA0106, playback] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/03/2006
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0G8310
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd03/03/2006:svnDellInc.:pnOptiPlexGX280:pvr:rvnDellInc.:rn0G8310:rvr:cvnDellInc.:ct3:cvr:
  dmi.product.name: OptiPlex GX280
  dmi.sys.vendor: Dell Inc.

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