When I am working in vi there pop up things that look like uninterpreted escape sequences. They come for example when I type i to enter insert mode, or ESC to leave it
Example, triggered by typing i immediately followed by ESC:
vi --version VIM - Vi IMproved 8.1 (2018 May 18, compiled Apr 15 2020 06:40:31) Included patches: 1-2269
This has begun a couple of weeks ago, I suspect it comes from patching the Ubuntu operating system. I can clean them with CTRL+L (redraw screen) but they restart popping up as soon as I resume typing.
Guessing that the sequences might try to switch colors, I already applied all the known tricks to disable colors, it makes no difference. The version installed does not even support the
syntax on/off (which I find no hardship :) )
set nohlsearch set t_Co=0 highlight LineNr NONE hi CursorLine NONE hi Normal cterm=none ctermfg=none ctermbg=none