Arch Linux

tbs

Member

Registered: 2015-04-20

Posts: 1

ALSA - microphone background noise

Hi guys,

I recently switched to a new motherboard: ASUS H87-Pro
Since then, I'm facing a weird problem with ALSA that causes a microphone background noise, even without a microphone connected.
I've recorded this noise with Audacity: noise.wav
and tried several snd-hda-intel parameters, a downgrade of orc to version 0.4.22, but without any success.

The user Jhackler has the same problem:
https://bbs.archlinux.org/viewtopic.php … 5#p1514525

Any suggestions?

lspci -nn | grep -i audio                      
00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller [8086:8c20] (rev 05)
01:00.1 Audio device [0403]: NVIDIA Corporation GF104 High Definition Audio Controller [10de:0beb] (rev a1)


[   11.693156] snd_hda_intel: unknown parameter 'vid' ignored
[   11.693159] snd_hda_intel: unknown parameter 'pid' ignored
[   11.693205] snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002)
[   11.693258] snd_hda_intel 0000:00:1b.0: Force to non-snoop mode by module option
[   11.693455] snd_hda_intel 0000:01:00.1: Disabling MSI
[   11.693458] snd_hda_intel 0000:01:00.1: Handle VGA-switcheroo audio client
[   11.693459] snd_hda_intel 0000:01:00.1: Force to non-snoop mode by module option
[   11.704801] sound hdaudioC0D0: autoconfig: line_outs=4 (0x14/0x15/0x16/0x17/0x0) type:line
[   11.704804] sound hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[   11.704805] sound hdaudioC0D0:    hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
[   11.704806] sound hdaudioC0D0:    mono: mono_out=0x0
[   11.704807] sound hdaudioC0D0:    dig-out=0x11/0x1e
[   11.704808] sound hdaudioC0D0:    inputs:
[   11.704809] sound hdaudioC0D0:      Front Mic=0x19
[   11.704810] sound hdaudioC0D0:      Rear Mic=0x18
[   11.704811] sound hdaudioC0D0:      Line=0x1a

lsmod | grep snd          
snd_hda_codec_hdmi     49263  4 
snd_hda_codec_realtek    67322  1 
snd_hda_codec_generic    63161  1 snd_hda_codec_realtek
snd_hda_intel          26387  9 
snd_hda_controller     26857  1 snd_hda_intel
snd_hda_codec         112621  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep              17244  1 snd_hda_codec
snd_pcm                88779  6 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_timer              26614  1 snd_pcm
snd                    73436  24 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel