[vim/vim] Built-in window-terminal ignores ANSI escape for cursor (Issue #19077)

torimus

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Jan 3, 2026, 5:53:24 PM (2 days ago) Jan 3

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torimus created an issue (vim/vim#19077)

Steps to reproduce

start gVim
spawn a terminal buffer with :terminal command
send ANSI escape sequence to set cursor invisible
$ echo -e "\033[?25l"
cursor remains visible

Expected behaviour

Cursor should be no more visible.

Same sequence to control cursor visibility does work correctly in xterm, rxvt, eterm, EAT in Emacs.

Seems like it is just not (yet) implemented in Vim's terminal emulator, like basic term-mode or eshell emulators in Emacs.

Version of Vim

9.1 p1-1975

Environment

Shell is bash, on Linux x86_64 system.
TERM == "xterm-256color"

Logs and stack traces

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Christian Brabandt

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Jan 4, 2026, 9:06:39 AM (2 days ago) Jan 4

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chrisbra left a comment (vim/vim#19077)

works for me in putty terminal (with and without tmux) inside bash and zsh.

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torimus

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Jan 5, 2026, 1:48:21 PM (16 hours ago) Jan 5

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torimus left a comment (vim/vim#19077)

works for me in putty terminal (with and without tmux) inside bash and zsh. Try running vim --clean. Ah I see now, this is happening only in the gui.

Yes, this is issue in gvim (GTK+ UI). In non-gui version it is a question of underlying terminal.

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BenYip

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Jan 5, 2026, 3:24:36 PM (14 hours ago) Jan 5

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bennyyip left a comment (vim/vim#19077)

I traced $ echo -e "\033[?25l" with gdb on Windows gvim(twt=conpty) and eventually it goes to this branch:
https://github.com/vim/vim/blob/ad8138e7b64447e807840a54ae5829ebd0377afa/src/terminal.c#L3394-L3398

Because gui and tui vim have different cursor logic, setting term->tl_cursor_visible = false doesn't make make it truly invisible. The cursor got turned on somewhere.

The command does something to the cursor, it starts blinking at the end of line. I don't know why it's at there.
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