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[Launchpad Bug Tracker <1021081@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/1021081

Title:
  NFS lockup (readonly udp nfsv4 gigabit)

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I've got a 12.04 precise client with lots of mounts like this.

  morgul:/n2 on /n2 type nfs (ro,udp,nolock,vers=4,addr=192.168.10.212,clientaddr=192.168.10.216)
  morgul:/n1 on /n1 type nfs (ro,udp,nolock,vers=4,addr=192.168.10.212,clientaddr=192.168.10.216)

  Periodically, they all lock up, stuck until reboot. Some processes
  (df) stuck like that respond to ctrl-C, others don't (ls)

  Networking is fine, and interestingly I can remount the export from
  the server on another path on the same client and the new mount works
  fine, while all the old ones are still stuck. No useful messages in
  syslog.

  The server is runnig oneiric, 64 bit.

  This seems like a recurrence of NFS bugs that people have reported
  before, which have been claimed to be fixed. Its clearly not. I get it
  randomly after transferring a few GB of data. (mythtv playback)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-25-generic 3.2.0-25.40
  ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
  Uname: Linux 3.2.0-25-generic i686
  NonfreeKernelModules: fglrx
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: SB [HDA ATI SB], device 0: ALC888 Analog [ALC888 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC1', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code -15:
  Card0.Amixer.info:
   Card hw:0 'SB'/'HDA ATI SB at 0xfe7f4000 irq 16'
     Mixer name	: 'Realtek ALC888'
     Components	: 'HDA:10ec0888,10ec0888,00100001'
     Controls      : 16
     Simple ctrls  : 8
  Card1.Amixer.info:
   Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfe9e8000 irq 19'
     Mixer name	: 'ATI RS690/780 HDMI'
     Components	: 'HDA:1002791a,00791a00,00100000'
     Controls      : 4
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Wed Jul  4 23:57:28 2012
  HibernationDevice: RESUME=UUID=c726b220-d3ec-476b-af1e-e1cf033eeb20
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-25-generic root=UUID=4db66c39-60c5-41f4-9d1c-837976c7f8b3 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-25-generic N/A
   linux-backports-modules-3.2.0-25-generic  N/A
   linux-firmware                            1.79
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-06-05 (29 days ago)
  dmi.bios.date: 08/20/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 080015
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: To be filled by O.E.M.
  dmi.board.vendor: To be filled by O.E.M.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080015:bd08/20/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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