I have installed Ubuntu 18.04 on a Lenovo Erazer for about a year.
A few days ago, when I try to boot normally, the Ubuntu logo freezes on the computer after about 20 seconds and the mouse pointer is displayed. Then my screen turns black after a few minutes.
I can boot Ubuntu in recovery mode, but if I do, all the downloaded videos that I watch crash.
So what should I do?
Radeon R9 360
8 GB RAM