My laptop's screen blinks and can't enter the login screen, this happens when the laptop is suspended or locked, I think this is because I use the nvidia driver. is it here that can help me?
dell inspiron-3421 with Nvidia GT625M
There's workaround on this link:
This is a manual trick/bypass for nvidia graphics driven laptops till an official solution comes up! The simple way to handle this is to press the following keys at the same time immediately you resume from suspension or lock ; CTRL + ALT + DELETE