Public bug reported: I used alsa-dkms driver with Oneiric, and mics do work correctly. I had clean sound, and two different devices (internal and external) with different adjustable levels. See https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/898081
After upgrade, mic was really noisy and crackling. Adding "options snd- hda-intel position_fix=2" to /etc/modprobe.d/alsa-base.conf corrected the worst crackling, but the mic is still very noisy, and moreover, I have only one mic setting available, which creates a problem given that the levels of the two devices is very different. Using the alsa-daily PPA gave a totally broken configuration, no sound at all. That seems related to https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/927961 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: alsa-base 1.0.25+dfsg-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 2.0.1-0ubuntu7 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: romano 1840 F.... pulseaudio /dev/snd/pcmC0D0c: romano 1840 F...m pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf7cf8000 irq 46' Mixer name : 'Realtek ALC269' Components : 'HDA:10ec0269,104383ce,00100004' Controls : 18 Simple ctrls : 10 CurrentDmesg: [ 983.429598] composite sync not supported Date: Mon Apr 30 15:33:02 2012 InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaRecordingTest: ALSA recording test through plughw:Intel failed Symptom_Card: Built-in Audio - HDA Intel Symptom_Jack: Mic, Internal Symptom_Type: High background noise, or volume is too low Title: [1005PE, Realtek ALC269, Mic, Internal] Background noise or low volume UpgradeStatus: Upgraded to precise on 2012-04-28 (1 days ago) dmi.bios.date: 06/23/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1202 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: 1005P dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: x.xx dmi.chassis.asset.tag: 0x00000000 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK Computer INC. dmi.chassis.version: x.x dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1202:bd06/23/2010:svnASUSTeKComputerINC.:pn1005PE:pvrx.x:rvnASUSTeKComputerINC.:rn1005P:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x: dmi.product.name: 1005PE dmi.product.version: x.x dmi.sys.vendor: ASUSTeK Computer INC. mtime.conffile..etc.modprobe.d.alsa.base.conf: 2012-04-30T15:07:42.189177 ** Affects: alsa-driver (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/991957 Title: [1005PE, Realtek ALC269, Mic, Internal] Mic regression form oneiric: crackling sound, background noise, difficult switching with external mic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/991957/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
