> Have you tried a different USB port(s)? Yes. I plugged the USB sound adapter into a different port and the logged warnings persisted.
The laptop has 1 through 8 USB buses listed by lsusb, but only 3 external ports. Currently (and originally) attached as: Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 002: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter I temporarily tried it on: Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub which has two ports. I didn't bother trying it on both ports of that hub. Here's the full device list (probably redundant with one of the attachments above): Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 005: ID 064e:a117 Suyin Corp. (webcam) Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 002: ID 138a:0001 Validity Sensors, Inc. VFS101 Fingerprint Reader Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 002: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 002: ID 046d:c526 Logitech, Inc. Nano Receiver (mouse) Bus 006 Device 003: ID 04f2:0402 Chicony Electronics Co., Ltd Genius LuxeMate i200 Keyboard Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub -- 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/1189661 Title: "delay: estimated N, actual N" warning logged by kernel Status in “alsa-driver” package in Ubuntu: New Bug description: A recent Ubuntu 12.04 update has resulted in a flood of kernel log messages like: Jun 10 16:53:50 fringe kernel: [1083938.675908] delay: estimated 222, actual 1 Jun 10 16:53:53 fringe kernel: [1083941.451942] delay: estimated 89, actual 0 Jun 10 16:54:02 fringe kernel: [1083950.876085] delay: estimated 309, actual 1 Jun 10 16:54:12 fringe kernel: [1083961.212252] delay: estimated 266, actual 1 Jun 10 16:54:28 fringe kernel: [1083976.940540] delay: estimated 265, actual 0 Jun 10 16:54:31 fringe kernel: [1083979.444548] delay: estimated 177, actual 1 Jun 10 16:54:40 fringe kernel: [1083989.164726] delay: estimated 265, actual 1 Jun 10 16:54:48 fringe kernel: [1083997.216594] delay: estimated 354, actual 1 Jun 10 16:54:48 fringe kernel: [1083997.220835] delay: estimated 134, actual 1 Jun 10 16:54:55 fringe kernel: [1084003.572938] delay: estimated 222, actual 1 Jun 10 16:55:31 fringe kernel: [1084039.821516] delay: estimated 266, actual 1 Jun 10 16:55:33 fringe kernel: [1084041.717585] delay: estimated 89, actual 0 whenever a USB sound card is used. (Even just sitting idle with no playback. As long as the card is selected as the output device in Sound settings, it happens.) Here's a link to a message from about a year ago where Pierre-Louis Bossart says he is the one who added this diagnostic message: http://permalink.gmane.org/gmane.linux.alsa.devel/97011 Other references include: https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=798844 http://www.gossamer-threads.com/lists/linux/kernel/1592033?do=post_view_threaded There appears to be no functional impact or difference compared to how the sound card worked prior to the update. The warnings are either in error or warning of an insignificant condition. The main problem with them is that they obscure important errors in the kernel logs, and waste disk space. --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: tmetro 2686 F.... pulseaudio /dev/snd/pcmC0D0p: tmetro 2686 F...m pulseaudio /dev/snd/controlC1: tmetro 2686 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xdb300000 irq 47' Mixer name : 'Nvidia MCP77/78 HDMI' Components : 'HDA:10ec0889,10250145,00100004 HDA:11c11040,10250145,00100200 HDA:10de0006,10de0101,00100000' Controls : 38 Simple ctrls : 21 Card1.Amixer.info: Card hw:1 'Set'/'C-Media USB Headphone Set at usb-0000:00:1d.0-2, full speed' Mixer name : 'USB Mixer' Components : 'USB0d8c:000c' Controls : 5 Simple ctrls : 3 CheckboxSubmission: 4a2fa194ac4b2025b572a728c22df868 CheckboxSystem: ed86e29ffba809c116a39e33fa9fc45c DistroRelease: Ubuntu 12.04 EcryptfsInUse: Yes InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1) MarkForUpload: True Package: alsa-driver (not installed) ProcVersionSignature: Ubuntu 3.2.0-44.69-generic 3.2.44 Tags: precise Uname: Linux 3.2.0-44-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirtd lpadmin mythtv plugdev sambashare sudo dmi.bios.date: 09/09/2008 dmi.bios.vendor: Acer dmi.bios.version: V1.06 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: Aspire 8930 dmi.board.vendor: Acer dmi.board.version: PSMBOU-1234567 dmi.chassis.type: 1 dmi.chassis.vendor: Acer dmi.chassis.version: N/A dmi.modalias: dmi:bvnAcer:bvrV1.06:bd09/09/2008:svnAcer:pnAspire8930:pvrV1.06:rvnAcer:rnAspire8930:rvrPSMBOU-1234567:cvnAcer:ct1:cvrN/A: dmi.product.name: Aspire 8930 dmi.product.version: V1.06 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1189661/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
