I find that I have issues with the nvidia driver making my screen flicker/flash and sometime causes my machine to crash. I have found that it can be fixed by modifying /etc/modprobe.d/nvidia and replacing:
options NVreg_ModifyDeviceFiles=0
with:
options nvidia NVreg_RegistryDwords="PerfLevelSrc=0x2222" NVreg_Mobile=3 NVreg_ModifyDeviceFiles=0
(note: that is one single line that may wrap in your browser)
