No microphone input working Acer Aspire One ZG8

[Andy]

Binary package hint: pulseaudio

Installed both Ubuntu 9.10 and 10.04 Alpha 2 onto an Acer Aspire One ZG8. Sound card is working, but I cannot get any input signal from the onboard microphone. If I use an audio program, only white noise/static is recorded, for example if I perform a Skype test call. I know this is similar to other bugs being reported with Aspire Ones, but the bug hunters are requesting separate reports are logged so you can get the hardware configuration.

ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: robert 2076 F.... pulseaudio
 /dev/snd/pcmC0D0c: robert 2684 F...m wish8.5
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x56440000 irq 16'
   Mixer name : 'Realtek ALC272'
   Components : 'HDA:10ec0272,1025022c,00100001'
   Controls : 15
   Simple ctrls : 9
Date: Mon Feb 22 23:36:49 2010
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu10
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-14.20-generic
SourcePackage: pulseaudio
Uname: Linux 2.6.32-14-generic i686

[Daniel T Chen (crimsun)]

Have you tried increasing:

Simple mixer control 'Digital',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 120
  Front Left: Capture 60 [50%] [0.00dB]
  Front Right: Capture 60 [50%] [0.00dB]

[Andy (arwilliamsuk)]

Hi Daniel. I've tried adjusting the input levels with mixed results..
On one occasion I was able to briefly record some sound snippets - but
it sounded very noisy and then stopped working again... Really weird
because my other laptop uses exactly the same chipset (it is an Advent
machine), and that works perfectly. I've got two Acer Aspires One ZG8
and both demonstrate this behaviour so fairly certain a bug.

On Tue, 2010-02-23 at 00:13 +0000, Daniel T Chen wrote:
> Have you tried increasing:
>
> Simple mixer control 'Digital',0
> Capabilities: cvolume penum
> Capture channels: Front Left - Front Right
> Limits: Capture 0 - 120
> Front Left: Capture 60 [50%] [0.00dB]
> Front Right: Capture 60 [50%] [0.00dB]
>
> ** Changed in: pulseaudio (Ubuntu)
> Status: New => Incomplete
>

[Mark Cariaga (mzc)]

Hi Andy,

I'm also having this issue on a AOD250 / KAV60. It uses the same chipset ALC272. How can I force alsa to force detect a different chipset? I have tried using all alsa options and nothing work. I want to try to force the ALC268 or ALC662.

[Eugene (varnav)]

Same problem with 10.4 Beta 2 and Acer Aspire One AOA110

[Eduardo Luz (eduardofpl)]

I'm also experiencing this error in the final version of Ubuntu UNR 10.04 LTS over a Acer AOA 110.

[erichgamba (erichgamba)]

Same problem on an Acer emachines em250 with alc272 sound.

[Mark Cariaga (mzc)]

Install pavucontrol then adjust input unlink the levels

On May 14, 2010 11:05 PM, "erichgamba" <email address hidden> wrote:

*** This bug is a duplicate of bug 412862 ***
https://bugs.launchpad.net/bugs/412862
Same problem on an Acer emachines em250 with alc272 sound.

--
No microphone input working Acer Aspire One ZG8
https://bugs.launchpad.net/bugs/526121
You rece...

[João Miguel Lopes Moreira (jmlm-1970)]

The only solution to make microphone work is to install linux-backports-modules-alsa-generic...

Just go to:

Menu / System / Administration / Synaptic Package Manager

And search and mark for installation:

linux-backports-modules-alsa-generic

tip: if you have multiple versions click on the first and read the description which should inform what name to install...

If after the reboot and mic mute is off, still does not work, just go to terminal and type:

sudo nano /etc/modprobe.d/alsa-base.conf

and add or change the following:

options snd-hda-intel model=auto enable=yes

Then Ctrl+X, type Y to write and exit, reboot and mic will work.

Bye and have lots of fun with Ubuntu (the best).