Tmux Panel Blinking From Vim - How Do Disable?

[G M]

I have a small annoyance that I cannot seem to deal with. I often have vim open in a window and will sometimes press escape a couple of times (just habit) and then quickly switch windows. What happens is that the tmux panel will highlight the vim window even though nothing happened besides a benign escape key press being resolved. I included a screenshot of what it looks like. The window "vim" gets highlighted in black.

I don't really know what feature of tmux this is (so I have a hard time searching for it online) or if this is something I have to set in vim. I tried
set -g visual-bell off

but it does not seem to work. Any help would be appreciated.

George

[Trey Blancher]

George,

That looks like tmux picking up a bell (0x07) character, and is an indication
that the program on that window tried to alert the user for some reason. In one
terminal emulator I have to use, there is an audible tone (typically the system
alert tone on Windows) when the shell issues a bell character.

How to turn it off in tmux I don't know, but you may be able to configure vim to
not issue a bell character in the first place when you press Escape more than
once, and that will avoid tmux picking it up.

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[G M]

I have fixed it. It seems that I had to disable this in vim. I added the following to my vimrc

set vb t_vb=