I'm using 11.04 (I know that support has been dropped) 32bit on my Desktop machine.
I never had performance problems with Adobe Flash on Ubuntu. But since today, all flash videos in browsers are insanely jerky so that I can't enjoy watching them. CPU usage is at about 20%.
I really don't know what happened. The only thing changed since it worked last time was that I plugged my TV as a second monitor on my graphics card and mirrored the screen. I have an Nvidia GTX 560Ti and use the driver version 173.
I tried both Firefox and Chromium, with both
adobe-flashplugin - none of them worked. https://www.adobe.com/software/flash/about/ tells me that I have flash version 220.127.116.11. It's strange that they say that 18.104.22.168 should be available, but I think this is an update issue of my outdated Ubuntu version (11.04).
If I could at least find out what the bottleneck is... CPU usage is very low as already said, it also isn't a buffering issue (HTML5 plays very well by the way). I don't know how to get the GPU usage, however, the Nvidia GUI reports no increasing temperature.
Do you have any idea what is causing this issue?