Recently this key combination has been removed in Arch so I needed to reactivate it:
Code: Select all
setxkbmap -option "terminate:ctrl_alt_bksp"
After typing that in the terminal you can restart the GUI when it hangs ..or whatever...by hitting <CTRL>+<ALT>+<BACKSPACE>
If you want it to stick; you can add the above command to the key combination in your DE settings under "Keyboard".