Force GPU hardware acceleration

Hi all,
I’ve been running tests with Jitsi tracking GPU usage on my machine. I noticed that in some conferences with more than 2 participants the GPU is engaged for the conference and in other it doesn’t.

As for VP8 codec HWA it seems that on p2p mode with VP8 the GPU is engaged and the moment the JVB kicks in it’s gone but not always.

Ideas anyone?