Hundreds of posts have been posted regarding the boot freeze and lockouts regarding installing Nvidia Driver into Ubuntu and Mint and other OS’s and after extensive testing with multiple Os’s/Distros it appears not to be a manufacture defect with Nvidia software the problem exists as a system and driver collision causing failure. There is a simple easy fix with knowledge of how however the average home user may not be able to perform.
The problem exists as the system boots; many systems have incorporated a boot-time splash screen and as such nvidia has also incorporated a boot-time splash screen and the two splash screens collide causing system failure,boot freeze, lockout,etc…
The Linux Ubnuntu and Mint fix
If your system is locked you cannot get into it reboot the system and hold down the shift key as linux starts to boot it will open a window where you have options, use your down arrow on keyboard to select the recovery option and push enter in the recovery window select reboot the system normal and hit enter, it may pop up a couple times just keep pushing enter then the system will dos boot and if your system is encrypted you will have to enter your password when it asks if not just let it go your system will boot normal then just follow these steps to fix the problem.
You must open the file grub...It can be found in the system files.
open system files
look and open the folder etc
then look for and open the folder default
right click on any blank area in the folder and select run as administrator
then double click the file grub (do not open the grub folder just the single grub file, there is a grub folder and a grub file)
In the grub file look for the line with the words “Quiet Splash” and delete the words Quiet Splash not the quotation marks (words Only) so that it now looks like this “”,
7)close the grub file window it will ask you do you want to save click save.
then restart your computer.This turns off the linux splash screen that hides the system loading process. Upon reboot you will now see the loading process but dont be alarmed it is normal. (The slash screen you turned off hides, this it is normal. As it loads if you installed a encrypted system you will be asked for to unlock password during this process when it stops look at the bottom line that says enter your encryption password to unlock crypt sda or whatever then hit enter and let it finish.
The boot screen has the encryption login window built into it, you have turned it off because it crashes the system when you install Nvidia drivers. You will have to enter your encryption password in the text that you now see on your window if your system is encrypted, when the text stops the bottom line will read (enter your password to unlock crypt sda) when you do it will continue and boot the system.If your system is not encrypted,just let the system boot do nothing else until your system opens and it will if you just leave it alone, then you can enter your password as you normally would and use your system as normal
During the boot process you will see a window in text that looks like a login above it it says [u]TTY and enter login------Do Not Do anything, Do Not enter login----Ignore this[/u]-- in a few seconds your system will boot be patient