When I upgraded my system under virtualbox to Ubuntu 15.04, i started getting the following errors when running a simple blank template Qt application.

pci id for fd 14: 80ee:beef, driver (null)
libGL error: core dri or dri2 extension not found
libGL error: failed to load driver: vboxvideo

I'm running Qt Creator 3.5.0 (opensource)
Based on Qt 5.5.0 (GCC 4.9.1 20140922 (Red Hat 4.9.1-10), 64 bit)

Search results point to the problem being fixed in an earlier version and due to hardware acceleration but nothing I have tried so far eliminates this error.
The template program seems to run but the console output shows these errors and it isn't clear that something else will break down the road because of this.

Anyone have information about this problem recently?

Thanks in advance.
Michael