I have a similar problem on the same hardware: IDT 92HD91BXX on a dell 14z inspiron 5423 ultrabook. Instead of no sound, white noise is continuously emitted from the sound card (only from speakers, never when using headphones). Other people seem to be affected, as documented in this Ubuntu forum thread:
http://ubuntuforums.org/showthread.php?p=12356165 After some experimenting I found a workaround and posted it as an answer to a question on askubuntu.com: http://askubuntu.com/questions/192185/12-04-dell-14z-inspiron-5423 -ultrabook-sound-noise/217672 . I hope it can help debugging the issue. I attach the python script I use for getting rid of the white noise at boot. ** Attachment added: "A python script that eliminates the white noise on IDT 92HD91BXX" https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/888703/+attachment/3434554/+files/fix-idt-codec -- 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/888703 Title: [320-1020m, IDT 92HD91BXX, Speaker, Front] Playback problem Status in “alsa-driver” package in Ubuntu: Confirmed Bug description: This is an HP TouchSmart 320, model number 320-1200m. Sound to headphone jack works properly, but sound to built-in speakers does not work. I have installed Windows, and with Windows 7 installed, all audio hardware works properly, so this isn't a hardware fault. I've looked at https://help.ubuntu.com/community/HdaIntelSoundHowto and have been unable to find my card in http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt . I have tried adding almost every conceivable model in the line "options snd-hda-intel model=MODEL" line I added to /etc/modprobe.d /alsa-base.conf. I've gone to Control Center -> Sound Preferences to attempt settings that make sound work. The "Hardware" tab shows one device: "Internal Audio 1 Output / 1 Input Analog Stereo Duplex." There are two output profiles listed in the selection box at the bottom of the tag: Analog Stereo Duplex and Analog Stereo Output. Neither cause sound to emit from the speakers. I've also run alsamixer on the command-line and ensured that everything is set to maximum and nothing is muted. I have the same symptoms in 11.04 and 11.10. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: alsa-base 1.0.24+dfsg-0ubuntu2 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4 Uname: Linux 3.0.0-12-generic-pae i686 NonfreeKernelModules: fglrx AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Generic [HD-Audio Generic], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 1.23-0ubuntu4 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Generic [HD-Audio Generic], device 0: STAC92xx Analog [STAC92xx Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: mpower 1668 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Generic'/'HD-Audio Generic at 0xfeb40000 irq 16' Mixer name : 'IDT 92HD91BXX' Components : 'HDA:111d76e0,103c2acb,00100102' Controls : 14 Simple ctrls : 9 Date: Thu Nov 10 11:10:12 2011 InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release i386 (20111011) PackageArchitecture: all ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic failed Symptom_Card: Internal Audio - HD-Audio Generic Symptom_Jack: Speaker, Front Symptom_Type: Only some of outputs are working Title: [320-1020m, IDT 92HD91BXX, Speaker, Front] Playback problem UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/23/2011 dmi.bios.vendor: AMI dmi.bios.version: 7.07 dmi.board.asset.tag: 2MD1400942 dmi.board.name: 2ACB dmi.board.vendor: PEGATRON CORPORATION dmi.board.version: 1.03 dmi.chassis.asset.tag: 2MD1400942 dmi.chassis.type: 3 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnAMI:bvr7.07:bd08/23/2011:svnHewlett-Packard:pn320-1020m:pvr:rvnPEGATRONCORPORATION:rn2ACB:rvr1.03:cvnHewlett-Packard:ct3:cvr: dmi.product.name: 320-1020m dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/888703/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
