I have this in my .screenrc: defescape '^\^\' escape '^\^\' If I type 'screen' and then, once screen has started, ^\-x to lock the terminal, after I unlock it ^\ is no longer the escape character; ^A is. If I run "screen -e^\\^\\', to do the same thing as the options but from the command line, it works fine.
works in 3.9.9