Ultra slow flash performance in karmic beta1

[abujafar]

Binary package hint: flashplugin-nonfree

The already cpu intense flashplugin has become unusable after i upgrade to karmic beta1.
While playing a flash video (in Firefox or Chrome), the cpu goes to 100% and system becomes unresponsive.

[abujafar (abujafar)]

Disabling compiz helps a lot. I suppose flash and compiz are not compatible.

[bp0 (bullet-proof-0)]

I can confirm that disabling compiz (via compiz switch) makes a huge difference, at least for BBC iplayer. Subjectively, flash performance in Karmic RC with compiz enabled is significantly worse than Jaunty.

[Loboss (szymonkarolewski)]

In actual Karmic the situation is the same. Youtube runs very slow if compiz enabled. Much slower than Jaunty. Probably there is some compiz issues as it seems to run slower globaly.

[Fletch (brent-d-fletcher)]

Here is how I solved the problem on my computer:

Edit or create a xorg.conf file under /etc/X11. (Note: in karmic a xorg.conf file is not required as ubuntu now automatically detects and choses the settings for your computer. So chances are there will be no file there.)

Under your video device, enter the following:

 Option "MigrationHeuristic" "greedy"

If you are creating a fresh xorg.conf and are unsure of how to set it up, then do something similar to the one that I have attached.

Basicaly, Karmic does not choose the optimal settings for certain video cards (I run a radeon X850). Setting the option "MigrationHeuristic" to "greedy" or "smart" improves the performance. This issue has already been logged at https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/330545.

I also had significant performance problems in Kubuntu with Kwin. Changing the setting to greedy solved this problem as well.

[abujafar (abujafar)]

I had significant performance improvement enabling the DRI2 radeon interface.
Append radeon.modeset=1 to kernel boot parameters.

[Daniel van Vugt (vanvugt)]

I believe that hardware-accelerated video rendering was only fully completed for Linux in Flash Player version 11. Please try the new version and if it works for you then change the status to Fix Released. If it doesn't work then please change the status to Confirmed. If you don't care about this bug any more then you don't need to change anything -- it will expire automatically.

[Launchpad Janitor (janitor)]

[Expired for flashplugin-nonfree (Ubuntu) because there has been no activity for 60 days.]