When I launch tmux in the terminal, is causes my Linux Mint to play a sound in the speakers.

The sound is a Linux Mint system sound. Perhaps it's the "alert" sound, but I cannot identify it by name.

The same alert sound plays when I exit tmux.

Any ideas on how to disable this sound when tmux is launched?

  • 1
    Do you have any of the bell settings in your .tmux.conf?
    – jasonwryan
    Jun 24, 2012 at 7:00
  • No, my .tmux.conf file is empty.
    – eoinoc
    Jun 24, 2012 at 9:59
  • I am seeing the same issue, after having enabled/setup the bell in general. It only happens with gnome-terminal, and there's an additional string when exiting tmux: ]112[exited]. tmux 1.9-6ubuntu1. gnome-terminal 3.6.2-0ubuntu1. Ubuntu 14.04.
    – blueyed
    Oct 17, 2014 at 3:58

3 Answers 3


Try setting either bell-on-alert [on | off] (off) or bell-action [any | none | current] (none). There's visual-bell [on | off] also.

  • Dang, none of them made a difference. For example, I set set-option bell-on-alert off in ~/.tmux.conf.
    – eoinoc
    Jun 24, 2012 at 15:51
  • @eoinoc, oh, it does, alas. :)
    – poige
    Jun 24, 2012 at 16:28
  • @eoinoc, It's really annoying issue looking like a bug, actually…
    – poige
    Jun 26, 2012 at 14:31
  • Oh, interesting if that's a tmux bug.
    – eoinoc
    Jun 27, 2012 at 17:33

The "bell" is launched by your terminal, not tmux! I use Gnome terminal and could disable it going to EDIT --> Profile Preferences and unticking "Terminal Bell" (this disable all the bells though)


This appears to be a bug in gnome-terminal.

I've just upgraded to 3.14.0-1 (from Debian testing) and the beep during startup and exit of tmux in gnome-terminal is gone.

Therefore it's likely to have been fixed since 3.6.2-0ubuntu1 - or there's an Ubuntu patch causing it (which Linux Mint might also use).


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