seem you are not using latest alsa driver
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=f1e762ddc8035f803d15f8c524151bf788482ec2
Simple mixer control 'Input Source',0
Capabilities: cenum
Items: 'Front Mic' 'Rear Mic' 'Line'
Item0: 'Rear Mic'
Simple mixer control 'Input Source',1
Capabilities: cenum
Items: 'Front Mic' 'Rear Mic' 'Line'
Item0: 'Rear Mic'
Simple mixer control 'Loopback Mixing',0
Capabilities: enum
Items: 'Disabled' 'Enabled'
Item0: 'Disabled'
Node 0x1e [Audio Selector] wcaps 0x300501: Stereo
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 6
0x2c 0x2b* 0x2a 0x29 0x28 0x21
most via codecs able to record the playing signal by select stereo mix ( node
0x21)
Node 0x21 [Audio Mixer] wcaps 0x20050b: Stereo Amp-In
Control: name="Front Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=3, ofs=0
Control: name="Front Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=3, ofs=0
Control: name="Rear Mic Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="Rear Mic Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=1, ofs=0
Control: name="Line Playback Volume", index=0, device=0
ControlAmp: chs=3, dir=In, idx=2, ofs=0
Control: name="Line Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=In, idx=2, ofs=0
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x80 0x80] [0x1f 0x1f] [0x81 0x81] [0x80 0x80] [0x80 0x80]
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
Connection: 5
0x2c 0x2b 0x2a 0x29 0x28
In-driver Connection: 6
0x2c 0x2b 0x2a 0x29 0x28 0x08
node 0x08 is the audio output
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1365769
Title:
[G41MT-S2P, VIA VT2020, Pink Mic, Rear] No sound at all
Status in “alsa-driver” package in Ubuntu:
Incomplete
Bug description:
The problem is that the microphone is not detected after a reboot. As
a result, some applications cannot get sound from the microphone.
The Input tab of the Sound window lists no device.
I have a workround which is to disconnect and then connect the
microphone after I have logged in.
Interestingly, the audacity application can access the microphone when
the system says that the device does not exist
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-67.101-generic 3.2.60
Uname: Linux 3.2.0-67-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tim 2060 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Sep 5 00:12:39 2014
InstallationDate: Installed on 2011-07-29 (1133 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:Intel failed
Symptom_Card: Built-in Audio - HDA Intel
Symptom_DevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tim 2060 F.... pulseaudio
Symptom_Jack: Pink Mic, Rear
Symptom_Type: No sound at all
Title: [G41MT-S2P, VIA VT2020, Pink Mic, Rear] No sound at all
UpgradeStatus: Upgraded to trusty on 2014-08-15 (20 days ago)
dmi.bios.date: 12/31/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F1
dmi.board.name: G41MT-S2P
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias:
dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd12/31/2010:svnGigabyteTechnologyCo.,Ltd.:pnG41MT-S2P:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnG41MT-S2P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: G41MT-S2P
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
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