If you have installed a graphics card in your Ubuntu Desktop or Server installation and wish to run another OS in the VMWare workstation or player you might run into the issue of slow performance of the virtual machine due to improper support of Graphics Acceleration but you can overcome this situation by adding the following line in the .vmx file of your virtual machine.
mks.gl.allowBlacklistedDrivers = TRUE
Graphics Acceleration in Ubuntu VMWare Workstation & Player