How do you unfreeze a frozen Ubuntu?
Maybe you can:
- go do the Ctrl + Alt + F1.
- run pm-suspend (will suspend the machine)
- start the machine; you should get the machine back to the state before the screen freezes (at least for me it did)
How do I unfreeze Ubuntu 18?
You could try Ctrl+Alt+T , if that does not work, type Alt+F2 and then type in gnome-terminal and press enter. Sometimes, it won't work either. If that's the case, you need to type Ctrl+Alt+F1 to get into the tty. This should bring you back to the login screen.
Why does my Ubuntu keeps freezing?
If you are running Ubuntu and your system randomly crashes, you may be running out of memory. Low memory could be caused by opening more applications or data files than will fit in the memory you have installed. If that is the problem, do not open so much at one time or upgrade to more memory on your computer.