At Wed, 28 Apr 2010 18:07:16 -0400, Daniel Chen wrote:

Hi,

Attached is a patch against sound-2.6 master HEAD (also applicable to 2.6.32.12 and 2.6.33.3) that fixes 0 dB for Packard Bell machines using Conexant CX20549. Without it, sound distorts horribly.

Thanks, applied now.

Takashi

Best, -Dan [2 0001-ALSA-hda-Fix-0-dB-for-Packard-Bell-models-using-Cone.patch <text/x-diff; US-ASCII (base64)>] From e2109922f4505fe08ef6e24673b4e4a91648fa4e Mon Sep 17 00:00:00 2001 From: Daniel T Chen crimsun@ubuntu.com Date: Wed, 28 Apr 2010 18:00:11 -0400 Subject: [PATCH] ALSA: hda: Fix 0 dB for Packard Bell models using Conexant CX20549 (Venice)

BugLink: https://launchpad.net/bugs/541802

The OR's hardware distorts at PCM 100% because it does not correspond to 0 dB. Fix this in patch_cxt5045() for all Packard Bell models.

Reported-by: Valombre Cc: stable@kernel.org Signed-off-by: Daniel T Chen crimsun@ubuntu.com

---

sound/pci/hda/patch_conexant.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c index 509a104..b9644e4 100644 --- a/sound/pci/hda/patch_conexant.c +++ b/sound/pci/hda/patch_conexant.c @@ -1196,9 +1196,10 @@ static int patch_cxt5045(struct hda_codec *codec)

switch (codec->subsystem_id >> 16) { case 0x103c:

• case 0x1631: case 0x1734:

• /* HP & Fujitsu-Siemens laptops have really bad sound over 0dB
  

•  * on NID 0x17. Fix max PCM level to 0 dB
  

• /* HP, Packard Bell, & Fujitsu-Siemens laptops have really bad
  

•  * sound over 0dB on NID 0x17. Fix max PCM level to 0 dB
  

  • (originally it has 0x2b steps with 0dB offset 0x14)
  */ snd_hda_override_amp_caps(codec, 0x17, HDA_INPUT,

-- 1.7.0.4