Issue with Flash and Firefox

Discussion in 'Mac Basics and Help' started by djxpress, Sep 19, 2011.

  1. djxpress, Sep 19, 2011
    Last edited: Sep 19, 2011

    djxpress macrumors member

    Nov 6, 2010
    I have Firefox 6.0.2 and Lion along with a few add-ons. I've been having issues with youtube/flash videos.

    Here is what my youtube looks like after a while. When I restart Firefox, everything works fine, for a few hours and then this happens.

    Here are my add-ons. I have a suspicion that Adblock Plus is causing it, but I have it disabled on Youtube, but still running, and it happens.

    Any ideas? I've tried reinstalling the add-on, Flash and Firefox with no success.
  2. satcomer macrumors 603


    Feb 19, 2008
    The Finger Lakes Region
    Try disable the plugins and see if you still get this issue. If that doesn't fix it then download both the Flash Deinstaller along with the latest Flash player. Then quit all your browsers.

    First use the deinstaller and then install the latest Flash player. See if that helps.
  3. wrldwzrd89 macrumors G5


    Jun 6, 2003
    Solon, OH
    I have the same setup as you, and have long since given up hope of getting Flash to work with Lion, instead using Google Chrome any time I need Flash to view something, and Firefox for everyday browsing.
  4. djxpress thread starter macrumors member

    Nov 6, 2010
    Figured out what it was. Switching from discrete to integrated graphics card while Firefox was opened caused the artifacting.

    Here's an explanation from Cody, the make of gfxCardStatus:

    "It's really not a good idea to switch GPUs while applications are open if you know that they have the potential to use the discrete GPU. Firefox, Twitter for Mac, Chrome, Spotify, Photoshop, etc. are all examples of this. It's a different story if you're just running Terminal, TextEdit, Finder, etc., as those don't ever use the discrete GPU.

    What is happening is that Flash is actually still rendering on one GPU, while another is being used to draw the rest of the screen. Then you get weird artifacts on the screen where it can't figure out what to draw. There's really no way around it other than to avoid switching."

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