Thank you for reporting this bug to Ubuntu. Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. ** Changed in: pulseaudio (Ubuntu) Status: Confirmed => Incomplete -- 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/1000741 Title: [42433ZG, Intel CougarPoint HDMI, Digital Out, HDMI] Sound is distorted (clipped/overdriven?) Status in pulseaudio package in Ubuntu: Incomplete Bug description: This machine (Thinkpad T520) is connected to a Lenovo Advanced Mini Dock Series 3 (?), marked "type 4337". The dock has a DisplayPort output which can carry audio, but the audio sounds very badly clipped/overdriven no matter what I do with the mixers. PulseAudio's volume setting does adjust the volume, but does not affect the quality. The mixers in alsamixer -D hw:PCH do *not* affect the volume on this output at all. The first speaker test played on the laptop's speakers and sounded fine. The second test played over HDMI and was distorted. I'm aware this may just be bad hardware design and not fixable in software. :-) See also bug 1000734 for a less severe problem with a 3.5mm output on the same dock: background crackle. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: pulseaudio 1:1.1-0ubuntu15 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu7 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: cmb 2245 F.... xfce4-volumed cmb 2264 F.... pulseaudio /dev/snd/pcmC0D7p: cmb 2264 F...m pulseaudio /dev/snd/controlC29: cmb 2245 F.... xfce4-volumed Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf2620000 irq 45' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:14f1506e,17aa21cf,00100000 HDA:14f12c06,17aa2122,00100000 HDA:80862805,80860101,00100000' Controls : 36 Simple ctrls : 13 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown' Mixer name : 'ThinkPad EC (unknown)' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Thu May 17 14:04:03 2012 InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_Jack: Digital Out, HDMI Symptom_PulsePlaybackTest: PulseAudio playback test failed Symptom_Type: Digital clip or distortion, or "overdriven" sound Title: [42433ZG, Intel CougarPoint HDMI, Digital Out, HDMI] Sound is distorted UpgradeStatus: Upgraded to precise on 2012-05-17 (0 days ago) UserAsoundrc: ctl.!default { type pulse } dmi.bios.date: 05/18/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 8AET46WW (1.26 ) dmi.board.asset.tag: Not Available dmi.board.name: 42433ZG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8AET46WW(1.26):bd05/18/2011:svnLENOVO:pn42433ZG:pvrThinkPadT520:rvnLENOVO:rn42433ZG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 42433ZG dmi.product.version: ThinkPad T520 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1000741/+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
