I was running Ubuntu 16.04 on my Lenovo G50. Everything was working fine. I haven't used that computer in about 6 months until I loaded it up last night. I did a simple apt-get upgrade and now it will not boot at all. When I try to boot, It says that the graphics card was not detected and that its running in low graphics mode. Displays a dialog box asking me what I want to do, but no option works. It either just reloads the dialog box or freezes the computer. Cant even load the terminal. I cant find my live disk, but will be making a new one latter today. Wondering if anyone know how I might be able to solve this without having to to run a live disk as I seem to be more or less lockout of everything.
Is there anything I can do to save it without having to reinstall the entire OS? Has anyone encountered this error before? If so, do you know what causes this?