bug#20922: acknowledged by developer ()

[Eli Zaretskii]

> From: Samuel Wales <samologist@gmail.com>
> Date: Mon, 30 Sep 2019 13:25:06 -0700
> Cc: 20922@debbugs.gnu.org
> 
> just realized i don't need to reboot to try it.
> 
> in linux console in 4.9.0-11-amd64
> 
> 1) i issue the inscrutable ansi sequence to make a nice red block cursor
> 2) i run emacs which produces a blinking white block
> 4) i setq visible-cursor to nil which produces a blinking underscore

Then I guess the problem is that Emacs sends the "ve" command (normal
cursor) to the terminal?  I'm not an expert on terminfo, but if
there's a way for a program to read the cursor properties, then Emacs
could do that at startup, and keep it, or restore it on exit.

Alternatively we might have a feature whereby users could set
attributes of the text-mode cursor for Emacs to use in its text
frames.  Patches welcome.