Public bug reported: When trying the 2.6.35~lucid1 backport kernel in 10.04, the Audio device doesn't auto powerdown after a reboot.
powertop reports: An audio device is active 100.0% of the time: hwC0D0 Realtek ALC272X Once I mute/unmute the audio, the device will drop into power-savings mode when unused, and powertop report 'device is active 0% of the time' when it isn't in use, and will stay this way until the next reboot. Using the default kernel (2.6.32-24), the device properly enters power- savings mode after a reboot: Recent audio activity statistics Active Device name 0.0% hwC0D0 Realtek ALC272 ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: linux-image-2.6.32-24-generic 2.6.32-24.39 Regression: Yes Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5 Uname: Linux 2.6.32-24-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ghaushe 1254 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0x58200000 irq 16' Mixer name : 'Realtek ALC272' Components : 'HDA:10ec0272,10250349,00100001' Controls : 14 Simple ctrls : 8 Date: Sun Aug 15 12:50:46 2010 HibernationDevice: RESUME=UUID=959d80ef-e27e-44be-a081-3fd67173fda3 InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4) MachineType: Acer AO532h ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=f5127df7-0d63-42db-af5b-2b68df4a8ce0 ro quiet splash ProcEnviron: SHELL=/bin/bash LANG=en_US.UTF-8 RelatedPackageVersions: linux-firmware 1.34.1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux dmi.bios.date: 06/15/2010 dmi.bios.vendor: Acer dmi.bios.version: V1.25 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: AO532h dmi.board.vendor: Acer dmi.board.version: V1.25 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.25 dmi.modalias: dmi:bvnAcer:bvrV1.25:bd06/15/2010:svnAcer:pnAO532h:pvrV1.25:rvnAcer:rnAO532h:rvrV1.25:cvnAcer:ct10:cvrV1.25: dmi.product.name: AO532h dmi.product.version: V1.25 dmi.sys.vendor: Acer ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug audio i386 lucid needs-upstream-testing regression-potential ubuntu-une -- 2.6.35-15~lucid1 doesn't allow audio device to powerdown https://bugs.launchpad.net/bugs/618348 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs