ssh + tmux + vim/less $TERM problems

[jeskowagner]

Hi and thank you for these dotfiles!

I love them already, but had some troubles around $TERM. My setup is ssh > tmux (v. 3.3). Then, using less (or vim) produced some warnings and errors.

E.g. less gives WARNING: terminal is not fully functional and
vim: E437: terminal capability "cm" required.

On the host machine (before tmux), $TERM is xterm-256color. Within the tmux session it's tmux-256color.

Forcing $TERM to xterm-256color fixes the problem. Presumably $TERM is changed during a call to _apply_tmux_256color. Indeed, commenting out the call to _apply_tmux_256color in .tmux.conf fixes the problem too. $TERM remains at screen-256color this way (as dictacted by .tmux.conf's line set -g default-terminal "screen-256color")

I was wondering what might be causing this problem and what the cleanest way to circumvent it is (for now I am sticking to removing the call to _apply_tmux_256color.

Best,
Jesko

[gpakosz]

Hello @jeskowagner 👋

Whats' your OS?
How did you install support for tmux-256color that Oh my tmux! is detecting?

In any case, you can edit your .local customization file copy and add

set -g default-terminal 'screen-256color'

[jeskowagner]

Thanks for your quick response and sorry for not including more info in the first comment.

My OS is Scientific Linux, which is essentially CentOS 7.
I did not install tmux-256color myself, but presumably it came along with my installation of tmux through conda. For example, using
infocmp -x tmux-256color I can see

Reconstructed via infocmp from file: /path/to/env/share/terminfo/t/tmux-256color  

tmux-256color|tmux with 256 colors

Restoring the call to _apply_tmux_256color in .tmux.conf and adding set -g default-terminal 'screen-256color' to .tmux.conf.local results in the same issue I described in the first comment, unless I add #!important.

[gpakosz]

Ah yeah I've seen broken tmux-256color along with Conda but I'm not sure how it's happening and what's broken exactly.

Ah sure #!important is the way to go!

[gpakosz]

And maybe it's worth reporting to Conda that the tmux-256color terminfo is broken in their version of ncurses

[jeskowagner]

Closing as now reported in this issue. Thanks again for your swift help!