Ctrl-W in vim dont work in insert mode in terminal

when I use Ctrl-W (or Ctrl-H) in insert mode it does nothing. In gvim with the same vimrc works. 开发者_StackOverflow中文版I'm using Ubuntu 10.4 with gnome, what may be wrong?

Try adding to your .vimrc: set backspace=indent,eol,start

Type this from normal mode:

:verbose mapC-vC-wEnter

This will tell you two things:

• you will see what your terminal emits for C-w (it is shown on the vim command line before you press Enter)

• it will tell you whether C-w has any mappings in any mode

• it will tell you where the mapping comes from

Subsequently look at

:verbose iabbrev

to see whether abbreviations are in the way

just try type "i" or "a" maybe you terminal has reserved these key binds?