Hi, Attached is a patch against sound-2.6 master HEAD that resolves stuttering audio on the original reporter's hardware. Please apply. This patch is applicable to all stable trees of 2.6.3x. Best, -Dan
From 70fb58b44c7970e92e8e8e33e5acc87d2cf77a8e Mon Sep 17 00:00:00 2001 From: Daniel T Chen <crimsun@xxxxxxxxxx> Date: Thu, 27 May 2010 18:32:18 -0400 Subject: [PATCH] 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@xxxxxxxxxxx> Cc: <stable@xxxxxxxxxx> Signed-off-by: Daniel T Chen <crimsun@xxxxxxxxxx> --- sound/pci/hda/hda_intel.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 77e22c2..e1ff2b8 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2288,6 +2288,7 @@ static struct snd_pci_quirk position_fix_list[] __devinitdata = { SND_PCI_QUIRK(0x1028, 0x01f6, "Dell Latitude 131L", POS_FIX_LPIB), SND_PCI_QUIRK(0x103c, 0x306d, "HP dv3", POS_FIX_LPIB), SND_PCI_QUIRK(0x1043, 0x813d, "ASUS P5AD2", POS_FIX_LPIB), + SND_PCI_QUIRK(0x104d, 0x9069, "Sony VPCS11V9E", POS_FIX_LPIB), SND_PCI_QUIRK(0x1106, 0x3288, "ASUS M2V-MX SE", POS_FIX_LPIB), SND_PCI_QUIRK(0x1179, 0xff10, "Toshiba A100-259", POS_FIX_LPIB), SND_PCI_QUIRK(0x1458, 0xa022, "ga-ma770-ud3", POS_FIX_LPIB), -- 1.7.0.4
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