Might be related to the radeon HD audio device. I have Radeon HD 5000 graphics card with HDMI output and the audio works quite ok with alsa, but jackd gives tons of xruns, no matter what period/buffer settings I try. This BUG could be the reason for that. I'm getting this:
BUG: pcmC1D0c:0, pos = 5461, buffer size = 5461, period size = 2730 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1305480 Title: BUG: pcmC0D0p:0, pos = 16390, buffer size = 16384, period size = 1024 Status in “linux” package in Ubuntu: In Progress Status in “linux” source package in Trusty: In Progress Bug description: This bug annoys me a lot. There are about 100 'System Problem Detected' windows at logon. After the logon it appears occasionally. ProblemType: KernelOops DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-23-generic 3.13.0-23.45 ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8 Uname: Linux 3.13.0-23-generic x86_64 Annotation: Your system might become unstable now and might need to be restarted. ApportVersion: 2.14.1-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: dbaskakov 2975 F.... pulseaudio /dev/snd/pcmC0D0p: dbaskakov 2975 F...m pulseaudio Date: Thu Apr 10 10:36:33 2014 Failure: oops HibernationDevice: RESUME=UUID=243c6575-07ba-42cb-99bd-c8a5122fb1fa InstallationDate: Installed on 2014-04-04 (5 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: System manufacturer System Product Name ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-23-generic root=UUID=411ab871-da55-4951-a933-1a9ea5710267 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu8 RfKill: SourcePackage: linux Title: BUG: pcmC0D0p:0, pos = 16390, buffer size = 16384, period size = 1024 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/30/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1401 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: F1A55-M LX dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1401:bd09/30/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnF1A55-MLX:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1305480/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
