If I run two instances of this python pyglet program, the 2nd instance is frozen until I stop the first one (same with other apps).
Program that freezes (needs python and pyglet) - is in this directory
My system is a laptop with Optimus, and running with DRI_PRIME=1 the program doesn't freeze.
I've recently enabled SNA, this hasn't fixed the freezing, but has made DRI_PRIME apps work OK (about half used to start with a black window until resized, they now work - glxgears worked, glxspheres was black).
Running oibaf drivers, with Nouveau on the nvidia half.
uname -r 3.19.0-28-generic
OS: Ubuntu 15.04 64 bit
Hardware: ASUS n56Vz
I am unable to reproduce, nearly a year after the original report (!!!)
Can you still reproduce? Please reopen if you can.