ALSA: hda: Use LPIB for Sony VPCS11V9E
commit1c87a71be7ed7868765e1f477d390ce66c7d5017
authorDaniel T Chen <crimsun@ubuntu.com>
Thu, 27 May 2010 22:32:18 +0000 (27 18:32 -0400)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 5 Jul 2010 18:10:33 +0000 (5 11:10 -0700)
tree167c7cc16a48c56384404710f35edf4024362666
parentedb5d7cfd7701a6e4541ed08da77e1d645a08ce5
ALSA: hda: Use LPIB for Sony VPCS11V9E

commit e96d3127760a2fc509bca6bf7e61e8bc61497aeb upstream.

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>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sound/pci/hda/hda_intel.c