Video causing very high CPU %, slugish system and weird mouse behaviour

Discussion in 'Mac Pro' started by jamesdrm, May 8, 2013.

  1. jamesdrm macrumors newbie

    Feb 7, 2012
    My early 2011 MBP has recently been frustratingly sluggish whenever I watch high quality video (even 480p or less, occasionally). After a shot time viewing youtube videos I get very bad frame rate drops, fans going mad and CPU spikes. Pausing the video and allowing buffer time doesn't seem to have any discernible effect either.

    Here's an activity log of when it happens;


    Occasional when viewing youtube videos, my mouse speed also becomes super-sensitive for no apparent reason. It returns back to normal after closing the video down and waiting a few minutes.

    I've updated flash, reset SMC and PRAM tried HTML5 - nothing. Any ideas?
  2. jjhoekstra macrumors regular

    Apr 23, 2009

    Try using Safari for the same video to see whether it again happens. It looks like Firefox and Flash mess up the kernel task.
  3. jamesdrm thread starter macrumors newbie

    Feb 7, 2012
    Sorry, forgot to mention; the same thing happens in both Chrome and Safari.
  4. xav8tor macrumors 6502a

    Mar 30, 2011
    "High-quality" and Flash video is very close to being an oxymoron. Now you know why Jobs hated it.
  5. Loa macrumors 68000


    May 5, 2003

    First, you're in the wrong forum section. This section is for the desktop Mac Pro.

    Second, this post might help you, describing issues with kernel task and heat (videos tend to heat our computers up).

    Good luck

  6. jamesdrm thread starter macrumors newbie

    Feb 7, 2012
    Apologies, could a mod please move this to the correct sub-forum?

    Also, I'm not sure if it is just related to video. It occasionally happens just through regular web browsing when I have multiple tabs open.

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