Comment 4 for bug 1291601

Hi Peter,

since the drivers are installed correctly now it normally shouldn't be necessary to provide PIPELIGHT_GPUACCELERATION=1, as this is the default settings for most streaming pages.

The remaining performance problem seems to be most likely related to pulseaudio. It might seem a bit confusing at first sight, but Silverlight actually tries to synchronize the audio and video speed. When pulseaudio has some problems with the playback, then this immediately affects the video.

You can try to kill pulseaudio with "pulseaudio -k" just before starting playback, does it stay smooth a bit longer then?

It could probably also help when you start your browser like this:
PULSE_LATENCY_MSEC=30 firefox

Sebastian