GNU bug report logs - #44826
27.1; Display artifacts which stay on the screen when scrolling

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Message #8 received at 44826 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: novim <laszlomail <at> protonmail.com>, novim
	<laszlomail <at> protonmail.com>
Cc: 44826 <at> debbugs.gnu.org
Subject: Re: bug#44826: 27.1;
 Display artifacts which stay on the screen when scrolling
Date: Mon, 23 Nov 2020 22:01:29 +0200

> Date: Mon, 23 Nov 2020 19:47:33 +0000
> From: novim via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> 1. save this package which makes org tables pretty by putting unicode characters onto regular org table
> characters
> 
> https://raw.githubusercontent.com/Fuco1/org-pretty-table/master/org-pretty-table.el
> 
> 2. eval it, so you get org-pretty-table-mode
> 3. download the attached org file
> 4. open it and go to the first character of table
> 5. turn on org-pretty-table-mode, the table should be switched to pretty mode
> 6. before the first character of the table type a space, so the header row is shifted by one character to the
> right
> 7. the display artifacts should appear at the top of the window
> 8. if you press cursor up until the window starts scrolling then you can see parts of the artifact staying on the
> screen during scrolling

The problem doesn't happen here, neither 7 nor 8.

Could it be some problem with your video driver?  If it has some
"optimization" features, disable them and try again.

> Pretty table mode uses jit for highlight, it might be an issue with jit. I assume it's some kind of emacs
> problem, because of the artifact staying in place while scrolling.

Artifacts that stay put while scrolling are a sign that Emacs's
display engine doesn't know they are there.  Which usually means some
problem outside of Emacs control.

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