Scroll with mouse in vim in tmux

Question

I have mouse scrolling turned on in vim and tmux and I'm using iTerm 2 because it has mouse support. But when I'm running vim inside of tmux, sometimes I have the problem that tmux is catching or stealing the scroll event from vim, I can scroll down in vim just fine. That's probably because in tmux I'm already scrolled all the way down, but when I try to scroll back up in vim, it goes into tmux scrolling mode and I see [0/0] at the top and I can't scroll up in vim.

How can I get mouse scrolling to work with vim inside of tmux?

It works for me out of the box with the Konsole terminal emulator... Getting those character codes right can be very tricky. — George Karpenkov
What do you mean character codes? I'm scrolling with the mouse... — aharris88
You might try putting set mouse-utf8 1 in your tmux.conf Not sure if that would help, as I use kubuntu with konsole. — EvergreenTree
I just tried putting set mouse-utf8 1 in my tmux.conf and when I open tmux it says: couldn't set 'mouse-utf8' need target session or -g — aharris88

aharris88 aharris88 · Accepted Answer · 2015-01-12T19:23:06

It turns out that the problem for me was caused by a vim plugin called tagbar: https://github.com/majutsushi/tagbar

I removed this plugin and I could scroll with the mouse just fine.

Scroll with mouse in vim in tmux

1 Answers