title: tmux and vim are frozen
body: <p>I just started using <code>tmux</code>. Running a session with <code>vim</code>. Tried to exchange split buffers in <code>vim</code>. Usually I use <kbd>Ctrl</kbd> + <kbd>w</kbd> + <kbd>Ctrl</kbd>+<kbd>x</kbd>. Don't use this combination very often so don't have it mapped to anything else. For some reason my <code>vim</code> session froze. Not sure what happened. I can execute <code>tmux</code> commands and switch between sessions but cannot do anything with <code>vim</code>. My guess is that a keyboard combination mentioned above does something with the session (locks it maybe). Google search didn't reveal any useful results. Does anyone know what I have done with my session and how to unlock it?</p>
  
  <p>Here is my <code>.tmux.conf</code></p>
  
  <pre><code># Smart pane switching with awareness of Vim splits.
  # See: https://github.com/christoomey/vim-tmux-navigator
  is_vim="ps -o state= -o comm= -t '#{pane_tty}' \
      | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$'"
  bind-key -n C-h if-shell "$is_vim" "send-keys C-h"  "select-pane -L"
  bind-key -n C-j if-shell "$is_vim" "send-keys C-j"  "select-pane -D"
  bind-key -n C-k if-shell "$is_vim" "send-keys C-k"  "select-pane -U"
  bind-key -n C-l if-shell "$is_vim" "send-keys C-l"  "select-pane -R"
  bind-key -n C-\ if-shell "$is_vim" "send-keys C-\\" "select-pane -l"
  bind-key -T copy-mode-vi C-h select-pane -L
  bind-key -T copy-mode-vi C-j select-pane -D
  bind-key -T copy-mode-vi C-k select-pane -U
  bind-key -T copy-mode-vi C-l select-pane -R
  bind-key -T copy-mode-vi C-\ select-pane -l
  set -g default-terminal "screen-256color"
  bind | split-window -h -c "#{pane_current_path}"
  bind - split-window -v -c "#{pane_current_path}"
  source-file .lightline.tmux
  
  # List of plugins
  set -g @plugin 'tmux-plugins/tpm'
  set -g @plugin 'tmux-plugins/tmux-sensible'
  
  # Other examples:
  # set -g @plugin 'github_username/plugin_name'
  # set -g @plugin 'git@github.com/user/plugin'
  # set -g @plugin 'git@bitbucket.com/user/plugin'
  
  # Initialize TMUX plugin manager (keep this line at the very bottom of tmux.conf)
  run '~/.tmux/plugins/tpm/tpm'
  </code></pre>