[alsa-devel] [PATCH] ALSA: hda - Use LPIB position fix for Acer AO751h

David Henningsson david.henningsson at canonical.com
Thu Feb 28 08:18:30 CET 2013

The user reports a regression (choppy audio), and that
position_fix=1 (or position_fix=4) fixes the issue.

This is a Poulsbo controller (8086:811b (rev 07)), so might be
worth checking if other Poulsbo machines suffer from the same bug.

Cc: stable at vger.kernel.org [v3.7+]
BugLink: https://bugs.launchpad.net/bugs/1132562
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
 sound/pci/hda/hda_intel.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 4cea6bb6..3505f1e 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -3114,6 +3114,7 @@ static bool check_hdmi_disabled(struct pci_dev *pci)
  * white/black-listing for position_fix
 static struct snd_pci_quirk position_fix_list[] = {
+	SND_PCI_QUIRK(0x1025, 0x0244, "Acer AO751h", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x1028, 0x01cc, "Dell D820", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x1028, 0x01de, "Dell Precision 390", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x103c, 0x306d, "HP dv3", POS_FIX_LPIB),

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