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[madbiologist <871412@xxxxxxxxxxxxxxxxxx>]

Like you, I was also going to suggest it was related to video drivers,
but given that you have high CPU usage when playing an OGG file, that
can't be the cause.

I suspect that this is your problem:

Intel(R) Atom(TM) CPU N270   @ 1.60GHz

That's not a very powerful CPU.  And if I recall correctly, your Intel
Corporation Mobile 945GME Express Integrated Graphics Controller is too
old to support VA-API.  However if the video plays smoothly I wouldn't
worry about it.  Just don't try to do much else while playing the video.
At 60%, you should be able to do other things while listening to an OGG.

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https://bugs.launchpad.net/bugs/871412

Title:
  more than 80% cpu usage when watching youtube video (flash or html5)
  firefox and chromium

Status in “firefox” package in Ubuntu:
  New

Bug description:
  Whether it's plugin-container or firefox with html5 enabled, watching
  youtube is cpu consuming.

  Same thing happens whith chromium-browser.

  Also when playing a simple ogg file(the one in examples folder) with
  totem, cpu goes up to 60%.

  I suppose it's related to intel video drivers.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: firefox 7.0.1+build1+nobinonly-0ubuntu2
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  AddonCompatCheckDisabled: False
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 0/1
     Subdevice #0: subdevice #0
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  elmo       1357 F.... pulseaudio
   /dev/snd/pcmC0D0p:   elmo       1357 F...m pulseaudio
  BuildID: 20111008085056
  CRDA: Error: [Errno 2] Δεν υπάρχει τέτοιο αρχείο ή κατάλογος
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf7db8000 irq 44'
     Mixer name	: 'Realtek ALC269'
     Components	: 'HDA:10ec0269,104383ce,00100004'
     Controls      : 12
     Simple ctrls  : 7
  Channel: release
  Date: Sun Oct  9 21:12:13 2011
  ExecutablePath: /usr/lib/firefox-7.0.1/firefox
  ForcedLayersAccel: False
  IfupdownConfig:
   auto lo
   iface lo inet loopback
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20111007.1)
  IpRoute:
   default via 192.168.1.1 dev eth0  proto static 
   169.254.0.0/16 dev eth0  scope link  metric 1000 
   192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.5  metric 1
  ProcEnviron:
   PATH=(custom, no user)
   LANG=el_GR.UTF-8
   SHELL=/bin/bash
  Profiles: Profile0 (Default) - LastVersion=7.0.1/20111008085056 (Running)
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/04/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0103
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: 1005HAGG
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: x.xx
  dmi.chassis.asset.tag: 0x00000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer INC.
  dmi.chassis.version: x.x
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0103:bd09/04/2009:svnASUSTeKComputerINC.:pn1005HAGG:pvrx.x:rvnASUSTeKComputerINC.:rn1005HAGG:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
  dmi.product.name: 1005HAGG
  dmi.product.version: x.x
  dmi.sys.vendor: ASUSTeK Computer INC.

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