Kitty: Scrolling in Vim makes background disappear

[Askannz]

Hello !

Scrolling in Vim makes the background color of Vim disappear, and the background color of the terminal is used instead.
https://streamable.com/wc1wx

The black is really the background color of the terminal and not some default OpengGL black (I've tested with another color).

OS is Linux Manjaro XFCE (latest version, stable branch, everything up-to-date). Kitty was downloaded through the AUR and its version is the latest one (0.2.7).

[kovidgoyal]

Add the following to your .vimrc

        " vim hardcodes background color erase even if the terminfo file does
        " not contain bce (not to mention that libvte based terminals
        " incorrectly contain bce in their terminfo files). This causes
        " incorrect background rendering when using a color theme with a
        " background color.
        let &t_ut=''

[kovidgoyal]

Incidentally, the latest version of kitty is 0.2.8
And just as a bonus tip, if you want to make vim more efficient, use the following

" General colors
if has('gui_running') || has('nvim') 
    hi Normal       guifg=#f6f3e8 guibg=#242424 
else
    " Set the terminal default background and foreground colors, thereby
    " improving performance by not needing to set these colors on empty cells.
    hi Normal guifg=NONE guibg=NONE ctermfg=NONE ctermbg=NONE
    let &t_ti = &t_ti . "\033]10;#f6f3e8\007\033]11;#242424\007"
    let &t_te = &t_te . "\033]110\007\033]111\007"
endif

Obviously change the colors in the above to match your color scheme.

[hillyu]

Incidentally, the latest version of kitty is 0.2.8
And just as a bonus tip, if you want to make vim more efficient, use the following

" General colors
if has('gui_running') || has('nvim') 
    hi Normal         guifg=#f6f3e8 guibg=#242424 
else
    " Set the terminal default background and foreground colors, thereby
    " improving performance by not needing to set these colors on empty cells.
    hi Normal guifg=NONE guibg=NONE ctermfg=NONE ctermbg=NONE
    let &t_ti = &t_ti . "\033]10;#f6f3e8\007\033]11;#242424\007"
    let &t_te = &t_te . "\033]110\007\033]111\007"
endif

Obviously change the colors in the above to match your color scheme.

When you enabled transparency and set a different color for vim bg (other than the one used for terminal), using above method will make vim background transparent after scroll. This is not intended behaviour I believe. Wonder if there is a correct way doing so, so far I am using let &t_ut='' but you can still see some flickering (caused by setting term background and back I guess).