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Commit 0ebf9e36 authored by Daniel T Chen's avatar Daniel T Chen Committed by Takashi Iwai
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ALSA: hda: Fix 0 dB for Lenovo models using Conexant CX20549 (Venice) 

Reference: http://mailman.alsa-project.org/pipermail/alsa-devel/2010-May/027525.html



As reported on the mailing list, we also need to cap to the 0 dB offset
for Lenovo models, else the sound will be distorted.

Reported-and-Tested-by: default avatarTim Starling <tstarling@wikimedia.org>
Cc: <stable@kernel.org>
Signed-off-by: default avatarDaniel T Chen <crimsun@ubuntu.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 482c4533

sound/pci/hda/patch_conexant.c

+4 −3
Original line number Diff line number Diff line
@@ -1197,9 +1197,10 @@ static int patch_cxt5045(struct hda_codec *codec) 
	case 0x103c:

	case 0x1631:

	case 0x1734:

		/* 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)

	case 0x17aa:

		/* HP, Packard Bell, Fujitsu-Siemens & Lenovo 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,

					  (0x14 << AC_AMPCAP_OFFSET_SHIFT) |