What kind of gpu do you have? You should be just been able to use driver manager to get the recommended Nvidia driver instead of using the mamarley ppa.
Nvidia GTX 970. I used the driver manager to begin with and after 10 minutes of being on it I crashed like crazy. Haven't crashed using the new one I got from mamarley ppa.
I really don't know what the difference is tbh. Maybe I just did something wrong after using the driver manager that messed up the newly installed driver.
That seems really weird. I have a gtx 960 and everything went fine with driver manager.
Well I'm no expert obviously. So it may have just been my fault.
I doubt it's your fault. There isn't much you can mess up with driver manager.
Then I got nothin. Unless there was some update in the package manager that messed it up, because that's all I did after installing the new driver.