ALSA: hda: Use LPIB for Sony VPCS11V9E
authorDaniel T Chen <crimsun@ubuntu.com>
Thu, 27 May 2010 22:32:18 +0000 (18:32 -0400)
committerTakashi Iwai <tiwai@suse.de>
Fri, 28 May 2010 05:51:17 +0000 (07:51 +0200)
commite96d3127760a2fc509bca6bf7e61e8bc61497aeb
treec28e3c0852c95194b16b41cde061134d44e5a1a4
parenta39e33eb2a9d6afa79021ba1de2aa7d1039f4e53
ALSA: hda: Use LPIB for Sony VPCS11V9E

BugLink: https://launchpad.net/bugs/586347
Symptom: On the Sony VPCS11V9E, using GStreamer-based applications with
PulseAudio in Ubuntu 10.04 LTS results in stuttering audio. It appears
to worsen with increased I/O.

Test case: use Rhythmbox under increased I/O pressure. This symptom is
reproducible in the current daily stable alsa-driver snapshots (at least
up until 21 May 2010; later snapshots fail to build from source due to
missing preprocessor directives when compiled against 2.6.32).

Resolution: add SSID for this machine to the position_fix quirk table,
explicitly specifying the LPIB method.

Reported-and-Tested-By: Lauri Kainulainen <lauri@sokkelo.net>
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/hda/hda_intel.c