** Description changed: 1) The release of Ubuntu using Ubuntu 12.10 AMD64. Ubuntu 13.04 AMD64, daily build as of 20130314. 2) The version of the package used linux-image-3.5.0-26-generic and later. 3) What you expected to happen When using a USB DAC to play audio, the audio should be played smoothly without breaks and cracking sound. 4) What happened instead After upgrading to Linux kernel 3.5.0-26-generic, one of my USB DAC (Digital Audio Codec) suddenly started to produce constently discontinous sound. Whenever there is audio being played by the system, the outcome would be always accompany with regular, stable, 5 to 6 times per second breaks. Both the system sound and songs from media player failed. One of my USB DAC works under Asynchronous Mode (USB device host clock), the other one works under Synchronous Mode (Motherboard host clock). The Synchronous one worked as usual after the updrade, while the Asynchronous failed to work after the upgrade. I downgraded the package to the previous 3.5.0-25-generic, then everything went back to normal. - I suspect the patch: - ALSA: usb-audio: fix invalid length check for RME and other UAC 2 devices - https://patchwork.kernel.org/patch/2100111/ - had cause this issue. + I have recheck the source of the issue, and find out: + This bug will appear after install kernel 3.5.7.6: + http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.7.6-quantal/ + https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1131944 + + kernel 3.5.7.5 and older were all fine. + http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.7.5-quantal/ --- ApportVersion: 2.6.1-0ubuntu10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tysontan 2117 F.... pulseaudio /dev/snd/controlC1: tysontan 2117 F.... pulseaudio /dev/snd/pcmC1D0p: tysontan 2117 F...m pulseaudio CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. DistroRelease: Ubuntu 12.10 HibernationDevice: RESUME=UUID=8545c3e2-caba-4eaa-8fa4-2fbebcc2d9bb InstallationDate: Installed on 2013-02-15 (14 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: LENOVO 0053A11 MarkForUpload: True Package: linux 3.5.0.26.32 PackageArchitecture: amd64 ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-26-generic root=UUID=8c60a142-505f-4d74-afa0-37686558e86e ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.5.0-26.40-generic 3.5.7.6 RelatedPackageVersions: linux-restricted-modules-3.5.0-26-generic N/A linux-backports-modules-3.5.0-26-generic N/A linux-firmware 1.95 RfKill: Tags: quantal package-from-proposed running-unity third-party-packages Uname: Linux 3.5.0-26-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 10/11/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 6QET70WW (1.40 ) dmi.board.name: 0053A11 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:bvr6QET70WW(1.40):bd10/11/2012:svnLENOVO:pn0053A11:pvrThinkPadX201Tablet:rvnLENOVO:rn0053A11:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 0053A11 dmi.product.version: ThinkPad X201 Tablet dmi.sys.vendor: LENOVO
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1136110 Title: Asynchronous USB DAC cracking sound in Linux kernel 3.5.0.26 and later To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1136110/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
