Running 11.10, with up-to-date Flash (, which the Flash site agrees is the up-to-date version). Every Youtube video reports a blank screen with the words, "Invalid parameters":


I've tried fiddling with the player "hardware acceleration" setting, and that has no effect. Similarly, I've clicked and un-clicked and re-clicked the "storage" options in the global settings thing, also to no effect.

I haven't seen this in any google searches (though there are other problems described involved the "Invalid parameters" message) which makes me think it's a recent phenomenon.

edit — hmm, fails in Firefox but works in Chrome ...


Maybe you already did but, have you tried "flash-aid" add-on for Firefox? It installs the best option for you. It has solved me problems several times after trying for hours by myself with no luck.

  • No I haven't tried that but I will now. Thanks! – Pointy Nov 18 '11 at 16:00
  • Worked. It's odd that the plugin seemed to work OK in Chrome. – Pointy Nov 18 '11 at 16:09

It doesn't technically solve your problem, but I heartily recommend trying HTML5 videos on YouTube and sidestepping this whole nasty Flash business.

You can opt in at http://www.youtube.com/html5 then most/nearly all videos will work without touching flash at all.

sudo killall plugin-container

and reload the page

This solution worked for me. Had incessantly been getting this particular error with videos that involved flash(html5 didn't seem to be available for them)

  • Yes, thanks for adding this - nuking the Flash container is certainly an important trick to know :-) – Pointy May 24 '12 at 22:52

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