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[Bug 852140] Re: timer interrupts count in /proc/interrupts is updated very slowly and is very small

 

Andrew Grabko, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.13-rc3

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags removed: interrupts timer
** Tags added: bios-outdated-2101

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

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

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https://bugs.launchpad.net/bugs/852140

Title:
  timer interrupts count in /proc/interrupts is updated very slowly and
  is very small

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  There is the result of "cat /proc/interrupts|grep timer" on my Ubuntu
  11.04 machine:

  0: 63 0 0 0 IO-APIC-edge timer
  LOC: 59 44 27 10 Local timer interrupts

  As one can see timer interrupts count is suspiciously small and is
  updated very slowly - it takes more than 30 seconds (or even more) for
  the value to be incremented. Though this do not cause any work or
  performance issues, this oddity is very disturbing.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: linux-image-2.6.38-11-generic 2.6.38-11.48
  ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
  Uname: Linux 2.6.38-11-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: VT1828S Analog [VT1828S Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  revan      2462 F.... pulseaudio
   /dev/snd/pcmC0D0p:   revan      2462 F...m pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf3ff8000 irq 46'
     Mixer name	: 'VIA VT1828S'
     Components	: 'HDA:11064441,104383cf,00100100'
     Controls      : 37
     Simple ctrls  : 22
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xf7cfc000 irq 17'
     Mixer name	: 'Nvidia GPU 12 HDMI/DP'
     Components	: 'HDA:10de0012,10de0101,00100100'
     Controls      : 16
     Simple ctrls  : 4
  Date: Fri Sep 16 22:35:48 2011
  HibernationDevice: RESUME=UUID=43c796b9-6f85-45e5-952f-d27b2d54143d
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
   
   vboxnet0  no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=1c4b72d4-91cb-4a55-be43-a7bcff5643b1 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-2.6.38-11-generic N/A
   linux-backports-modules-2.6.38-11-generic  N/A
   linux-firmware                             1.52
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to natty on 2011-04-30 (138 days ago)
  dmi.bios.date: 07/23/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1807
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P7P55D PRO
  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.:bvr1807:bd07/23/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7P55DPRO: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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