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when I fullscreen youtube or vimeo videos in ubuntu 12.04 they get laggy. I didn't have this problem when I was using Ubuntu 11.10. I know it might be something with flash, but I don't know how to fix it. Thanks. Also I'm using google chrome, I also try it in mozilla firefox and I get the same problem. This is happening with VIMEO and YOUTUBE.

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I've noticed this mostly only happens with HTML5 videos on YouTube. It may be something in Firefox, or the way YouTube is streaming the video. –  dobey Jun 13 '12 at 20:48
I would install Chromium(Google Chrome Web Browser) and see if the same thing happens. If it does not then it can very well be a FireFox issue. –  Reya276 Jun 13 '12 at 21:47
Also do you have the ubuntu-restricted-extras installed? –  Reya276 Jun 13 '12 at 21:48
I'm using google chrome and yes I tried chromium already. –  jart Jun 13 '12 at 23:16
possible duplicate of Why are Flash applications so sluggish? –  Jorge Castro Jul 12 '12 at 15:32

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