I am running Ubuntu 14.04 with a terminal window. Because I type fairly quickly I sometimes use ctrl-u to wipe out my partially entered line which works great. Once my partially typed line is wiped out, I am back at my command prompt and am ready to enter a command.
But sometimes I accidently press ctrl-shift-u and then immediately start typing (thinking I am at the command prompt again). Instead of wiping out the line, the characters I type are underlined and sometimes get converted into hex characters, or sometimes if I type too many characters when it is in this mode, my keyboard completely locks up. Even if I open an new terminal window I still can't type. The only solution is a reboot.
What am I activating when I type ctrl-shift-u followed by other characters? And is there a way for me to configure this feature off so I don't lock myself up?
(Perhaps I should type more carefully so I don't accidently hit ctrl-shift)
Thanks for your help, Robert