Genymotion 2.7.2 on Ubuntu 14.04 64 bit
It may be a problem of your Linux OS and Genymotion compatibility, genymotion 2.7.2 is not compatible with Ubuntu 14.04.
Even after you installed the bin file, if genymotion still can't work normally, you have to add a PPA.
Open terminal and type this:
sudo apt-add-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.9 g++-4.9