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[David Anderson <986831@xxxxxxxxxxxxxxxxxx>]

Here is the start of the messages, this from syslog.  The first such
messages

Nov  6 19:20:01 Dseti3 CRON[18475]: (root) CMD (if [ -x /etc/munin/plugins/apt_all ]; then munin-run apt_all update 7200 12 >/dev/null; elif [ -x /etc/munin/plugins/apt ]; then munin-run apt update 7200 12 >/dev/null; fi)
Nov  6 19:23:01 Dseti3 kernel: [129142.238696] [sched_delayed] sched: RT throttling activated
Nov  6 19:23:59 Dseti3 kernel: [129200.218913] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context
Nov  6 19:24:01 Dseti3 kernel: [129202.218438] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context


The day before I got (from syslog.3.gz)  a
  " soft lockup - CPU#19 stuck for 23s! [swapper/19:0]"
in syslog.  starting to look into this message now.

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https://bugs.launchpad.net/bugs/986831

Title:
  system freezes for some seconds: Attempted to yield the CPU while in
  atomic or interrupt context

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After the first freeze, dmesg showed:

  ...
  [194346.116070] NVRM: Xid (0000:01:00): 8, Channel 00000002
  [194348.116026] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context
  [194350.117812] NVRM: Xid (0000:01:00): 9, Channel 00000020 Instance 00000000 Intr 00000080

  
  After the second freeze, dmesg showed:

  ...
  [194346.116070] NVRM: Xid (0000:01:00): 8, Channel 00000002
  [194348.116026] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context
  [194350.117812] NVRM: Xid (0000:01:00): 9, Channel 00000020 Instance 00000000 Intr 00000080
  [194514.140070] NVRM: Xid (0000:01:00): 8, Channel 00000002
  [194516.140030] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context
  [194518.141391] sched: RT throttling activated

  michael@quad:~$ cat /proc/version_signature
  Ubuntu 3.2.0-23.36-generic-pae 3.2.14

  michael@quad:~$ lsb_release -rd
  Description:	Ubuntu 12.04 LTS
  Release:	12.04

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-23-generic-pae 3.2.0-23.36
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
  Uname: Linux 3.2.0-23-generic-pae i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu5
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  michael    9506 F.... pulseaudio
   /dev/snd/controlC0:  michael    9506 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf6ff8000 irq 44'
     Mixer name	: 'Realtek ALC883'
     Components	: 'HDA:10ec0883,1043829f,00100002'
     Controls      : 46
     Simple ctrls  : 22
  Card1.Amixer.info:
   Card hw:1 'UA101'/'EDIROL UA-101 (serial ZT82634), 192000 Hz at usb-0000:00:1a.7-3, high speed'
     Mixer name	: ''
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'MIDI Input Mode',0
     Capabilities: enum
     Items: 'High Load' 'Light Load'
     Item0: 'Light Load'
  Card2.Amixer.info:
   Card hw:2 'CX8811'/'Conexant CX8811 at 0xfb000000'
     Mixer name	: 'CX88'
     Components	: ''
     Controls      : 3
     Simple ctrls  : 2
  Date: Sun Apr 22 13:55:17 2012
  HibernationDevice: RESUME=UUID=dd8becab-8d85-4a0f-9840-3cd90d202035
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: System manufacturer P5K
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=en_US
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: root=UUID=4f6e10b1-9995-4249-a5e5-a9b20b72cace ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-23-generic-pae N/A
   linux-backports-modules-3.2.0-23-generic-pae  N/A
   linux-firmware                                1.79
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-04-18 (3 days ago)
  dmi.bios.date: 10/14/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1201
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5K
  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.:bvr1201:bd10/14/2008:svnSystemmanufacturer:pnP5K:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: P5K
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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