Terminal putting ANSI Escape Code in terminal line when attaching tmux session

[angadschawla]

Windows Terminal version

1.18.2822.0

Windows build number

10.0.22621.0

Other Software

I am using Windows terminal to connect via SSH (openSSH on Windows) to Linux machine. Once connected I run tmux attach to connect to an already running tmux session. The shell on Linux is zsh.

Steps to reproduce

Whenever I run "tmux attach -t session_name".

Expected Behavior

I should just be attaching to a detached session.

Actual Behavior

Whenever I connect to the detached session in Tmux, I get this input "61;6;7;22;23;24;28;32;42c" which seem line ANSI escape codes. This is annoying as if there is a process going in that tmux session this messes up the visual output of the script already running.

I tried running the same command on a Mac Machine using terminal and iTerm 2, and this error does not happen.

[j4james]

This is quite likely the same issue as #7185. And it was suggested there that upgrading SSH might help. The other suggestion was to set a longer escape-time value in your tmux config.

[angadschawla]

Thank you, @j4james! That handled it. I used the escape-time suggestion.

[gangefors]

For anyone that ends up here and is using byobu, the tmux config is located at ~/.byobu/.tmux.conf.

This config ended up solving the issue for me.

$ cat ~/.byobu/.tmux.conf
set-option -s escape-time 50

[noapoleon]

This does not fix it for me.
Also I get the exact same weird numbers "61;6;7;22;23;24;28;32;42c" but twice
I am using Windows Terminal version 1.19.10821.0

Here's my tmux config if that helps with anything
Right now escape-time is at 10 but I have tried from 10 to 10000 and it changes nothing

[sheen-justin]

@noapoleon I was getting pretty much the exact same issue. The culprit looks to be tmux-sensible.

In ${TMUX_PLUGIN_DIR}/tmux-sensible/sensible.tmux line 83 it sets tmux set-option -s escape-time 0. You can either modify this line to be a higher value or remove tmux-sensible from your .tmux.conf

[sheen-justin]

@noapoleon another option is to move the line set -sg escape-time 10 in your .tmux.conf from up top to immediately after the line set -g @plugin 'tmux-plugins/tmux-sensible'