Public bug reported:
The internal stereo microphone in the laptop doesn't work.
A workaround is to mute one of the two channels - making the microphone
input mono only - using e.g. hda_analyzer or possibly pavucontrol. I was
not able to get both channels working simultaneously - as one channel's
volume gets higher, the input volume gets lower and lower as if the two
channels interferred.
There is an existing bug #683901 filled about the stereo microphone.
In addition, the built-in Dolby Home Theater 5.1 Cinematic Surround speakers
are recognized at best as 4.0 (unusing front center and LFE which is rear
center) - only if I select 4.0 from the list in System volume, default is
stereo (that's wrong, isn't it?!) . I was not able to get these two to work
even using hda_analyzer. There is also a bug filled about it as #839800 but, as
well as the thread at ALSA bug tracker, is dead. In the ALSA bugtracker, I was
advised to send a mail to the ALSA mailing list - I tried sending the mail
twice but was waiting a year for absolutely no response - the mail wasn't even
published in the list if I'm right. I have really no idea what more could I do
about it.
Tested on Ubuntu 12.10 - today's build (5th September 2012)
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-13-generic 3.5.0-13.14
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic x86_64
AcpiTables: Error: command ['pkexec', '/usr/share/apport/dump_acpi_tables.py']
failed with exit code 127: Error executing
/usr/share/apport/dump_acpi_tables.py: Permission denied
ApportVersion: 2.5.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ubuntu 4645 F.... pulseaudio
/dev/snd/controlC0: ubuntu 4645 F.... pulseaudio
CRDA:
country AT:
(2402 - 2482 @ 40), (N/A, 20)
(5170 - 5250 @ 40), (N/A, 20)
(5250 - 5330 @ 40), (N/A, 20), DFS
(5490 - 5710 @ 40), (N/A, 27), DFS
CasperVersion: 1.321
Date: Wed Sep 5 17:00:00 2012
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120904.1)
MachineType: Acer Aspire 8943G
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=cs_CZ.UTF-8
SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent
file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet
splash -- maybe-ubiquity
RelatedPackageVersions:
linux-restricted-modules-3.5.0-13-generic N/A
linux-backports-modules-3.5.0-13-generic N/A
linux-firmware 1.91
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/11/2010
dmi.bios.vendor: Phoenix
dmi.bios.version: V1.06
dmi.board.name: SM83-CP
dmi.board.vendor: Acer
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenix:bvrV1.06:bd08/11/2010:svnAcer:pnAspire8943G:pvrNotApplicable:rvnAcer:rnSM83-CP:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 8943G
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug quantal running-unity
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https://bugs.launchpad.net/bugs/1046449
Title:
Acer Aspire 8943G internal stereo microphone doesn't work
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