Hello,
I installed 6 Pi2 with Ubuntu Mate 15.10 and GCompris. When running GCompris, starting for instance Tuxball game and changing level by clicking on left/right arrow, GCompris freezes, application have to be killed.
If I plug a USB headset like Plantronics, change the audio output device to this hardware, there is no problem, GCompris run smoothly, no freezes.
If I start GCompris without music (-m at command line) it works perfectly too. Problem is the same on the 6 Pi2. If I use the same hardware with Raspbian-Jessie which has module version 4.1.7-v7+ insteed of 4.1.10-v7+, it works.
Any hint ?
Daniel