I have the same problem with a Dell Vostro v131. Worked in 12.10, but not 13.04.
luciano@v131:~$ sudo lspci -v | grep -A7 -i "audio" 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) Subsystem: Dell Device 0510 Flags: bus master, fast devsel, latency 0, IRQ 51 Memory at f7f00000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode]) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1127699 Title: Internal microphone does not working in Dell 3420 with Ubuntu Raring Status in “pulseaudio” package in Ubuntu: Confirmed Bug description: Internal Microphone in Dell Inspiron 3420 a.k.a Dell Inspiron n4050 is not working with Ubuntu 13.04 - Raring Ringtail, no matter what I do. When I use the command line "alsamixer", the application doens't show the internal mic. Hardware: HDA Intel PCH * Ubuntu Version: 13.04 - Raring * pulseaudio: Installed: 1:3.0-0ubuntu1 Candidate: 1:3.0-0ubuntu1 Tabela de versão: *** 1:3.0-0ubuntu1 0 500 http://archive.ubuntu.com/ubuntu/ raring/main amd64 Packages 100 /var/lib/dpkg/status 1:3.0-0ubuntu1~ppa1 0 500 http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu/ raring/main amd64 Packages ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: pulseaudio 1:3.0-0ubuntu1 ProcVersionSignature: Ubuntu 3.8.0-6.13-generic 3.8.0-rc7 Uname: Linux 3.8.0-6-generic x86_64 ApportVersion: 2.8-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kadu 2425 F.... pulseaudio kadu 4171 F.... alsamixer CheckboxSubmission: 07ad8fbd3cc6d6acbb7e0d79b517f671 CheckboxSystem: d00f84de8a555815fa1c4660280da308 Date: Sat Feb 16 23:06:21 2013 InstallationDate: Installed on 2013-02-16 (0 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130214) MarkForUpload: True SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/28/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 04XGDT dmi.board.vendor: Dell Inc. dmi.board.version: A05 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA05:bd09/28/2012:svnDellInc.:pnInspiron3420:pvrNotSpecified:rvnDellInc.:rn04XGDT:rvrA05:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: Inspiron 3420 dmi.product.version: Not Specified dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1127699/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp