> I'm running vim in a console using gnome-terminal. I put these > mappings in my .vimrc file: > > map <c-q> :mksession! ~/.vim/.session <cr> > map <c-s> :source ~/.vim/.session <cr> > > Pressing those buttons (CTRL+Q or CTRL+S) doesn't work. When I map as > below instead: > > map <F9> :mksession! ~/.vim/.session <cr> > map <F10> :source ~/.vim/.session <cr> > > the commands work. > > What is causing this behavior? Is it the terminal capturing the CTRL+Q > and CTRL+S keystrokes before they reach VIM?
Yes, the ^S and ^Q keystrokes are flow-control characters. I don't have Gnome-term on hand, but it works much the same in other terminal emulators (xterm, rxvt, etc). Control+S is the "hey, stop sending stuff to this terminal until I have a chance to catch up" character, and Control+Q is the "okay, I've caught up, you can start sending stuff to my terminal again" character. The terminal software may catch these before Vim gets a chance to see them. You might poke around in your GT settings for a setting like "flow control" or "XON/XOFF" and try to disable that. It's not like your terminal runs on an 8-bit processor with 16 bytes of buffer for your serial-I/O terminal any more where a speedy 2400-baud modem might overwhelm your terminal's ability to draw on the screen. ;) -tim
