GNU Screen seems to freeze. Unable to enter user input.
I was using GNU screen and when I pressed the screen it became unresponsive. I can execute all the GNU screen commands, but can't enter user input. I don't want to kill this screen as I have important work and I don't want to lose it.
Ctrl-A q, which is the sequence to unblock scrolling.
Ctrl-A s is the sequence that blocks scrolling, which makes screen seem like it freezes.
Ctrl with whatever your escape key is for screen commands.