Re: [Alsa-devel] 2.6.16.x - relatively low volume and high noice using snd-ali15451
- From: Takashi Iwai <tiwai@xxxxxxx>
- Date: Mon, 29 May 2006 14:46:10 +0200
At Sun, 28 May 2006 11:28:33 +0400,
Andrey Borzenkov wrote:
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I have a notebook with built in sound card:
{pts/0}% lspci
00:00.0 Host bridge: ALi Corporation M1644/M1644T Northbridge+Trident (rev 01)
00:01.0 PCI bridge: ALi Corporation PCI to AGP Controller
00:02.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:04.0 IDE interface: ALi Corporation M5229 IDE (rev c3)
00:06.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link
Controller Audio Device (rev 01)
00:07.0 ISA bridge: ALi Corporation M1533 PCI to ISA Bridge [Aladdin IV]
00:08.0 Bridge: ALi Corporation M7101 Power Management Controller [PMU]
00:0a.0 Ethernet controller: Intel Corporation 82557/8/9 [Ethernet Pro 100]
(rev 08)
00:10.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller
(rev 01)
00:11.0 CardBus bridge: Toshiba America Info Systems ToPIC100 PCI to Cardbus
Bridge with ZV Support (rev 32)
00:11.1 CardBus bridge: Toshiba America Info Systems ToPIC100 PCI to Cardbus
Bridge with ZV Support (rev 32)
00:12.0 System peripheral: Toshiba America Info Systems SD TypA Controller
(rev 03)
01:00.0 VGA compatible controller: Trident Microsystems CyberBlade XPAi1 (rev
82)
A some point I noticed that volume became quite low; attempting to turn it up
using volume control on notebook results in very audible noise that makes it
impossible to actually use sound.
This pretty depends on the ac97 codec chip.
Check what is on your device via /proc/asound/card0/codec97#0/*
files.
I am very casual sound user so I unfortunately cannot tell when exactly the
problem appeared first; but I am pretty sure that in 2.6.14 I could normally
watch video or listen CD without much strain.
The driver code of ali5451 hasn't been changed much since long time
ago. So I suspect it's rather the mixer setting or breakage in other
place.
You can try 2.6.14 kernel with the latest ALSA driver 1.0.11 (compile
as external modules from alsa-driver-1.0.11 tarball) to check whether
it's a regression of ALSA or elsewhere.
Takashi
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- References:
- 2.6.16.x - relatively low volume and high noice using snd-ali15451
- From: Andrey Borzenkov
- 2.6.16.x - relatively low volume and high noice using snd-ali15451
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