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[Launchpad Bug Tracker <946562@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/946562

Title:
  Multiple 'task blocked for more than 120 seconds' messages in dmesg

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  After playing around for some time (usually from a couple of minutes
  to about 45 minutes) my Android phone becomes unusable through adb
  running on Ubuntu.

  All calls to adb (e.g. adb devices, adb kill-server) just hang and they don't respond to Ctrl+C etc. The adb application is listed in ps output as defunct:
  myuser     8405  0.0  0.0      0     0 ?        Zl   19:14   0:00 [adb] <defunct>

  Cannot kill adb or restart it. It did not happen before 11.10 and still happens on current 12.04.
  I assume it's not related to adb version because it does not happen with the same binaries (I share the directory) on Fedora 16.
  I cannot mount the phone as USB mass storage as well.

  Please examine the attached dmesg output for the 'task blocked'
  messages.

  I have to reboot my PC to make the phone accessible from the PC again.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image 3.2.0.17.17
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
  Uname: Linux 3.2.0-17-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.94-0ubuntu1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  darek      2278 F.... pulseaudio
   /dev/snd/controlC0:  darek      2278 F.... pulseaudio
   /dev/snd/pcmC0D0p:   darek      2278 F...m pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'NVidia'/'HDA NVidia at 0xf9e78000 irq 21'
     Mixer name	: 'VIA VT1708S'
     Components	: 'HDA:11060397,104383c4,00100000'
     Controls      : 42
     Simple ctrls  : 21
  Card1.Amixer.info:
   Card hw:1 'NVidia_1'/'HDA NVidia at 0xfbffc000 irq 18'
     Mixer name	: 'Nvidia GPU 0d HDMI/DP'
     Components	: 'HDA:10de000d,10de0101,00100100'
     Controls      : 24
     Simple ctrls  : 4
  Date: Sun Mar  4 19:56:29 2012
  HibernationDevice: RESUME=UUID=6d1f890f-0abe-4398-9fc2-f2a43a40d9c1
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-17-generic root=/dev/mapper/system-root ro quiet splash nomodeset video=uvesafb:mode_option=1280x720-24,mtrr=3,scroll=ywrap
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-17-generic N/A
   linux-backports-modules-3.2.0-17-generic  N/A
   linux-firmware                            1.71
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-02-03 (29 days ago)
  dmi.bios.date: 03/12/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0903
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M4N75TD
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0903:bd03/12/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4N75TD:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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