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Bug#975687: xterm: loses text lines, even descenders from some lines



On Sun, Dec 20, 2020 at 10:40:39PM +0000, Thorsten Glaser wrote:
> Thomas Dickey dixit:
> 
> >how far below?
> >
> >Just the window-decoration, or a line or so?
> 
> About a line, give or take (for the syslog window, the last line
> is the cursor, so I don’t need it, and I took a bit more than a
> line there; for that test, it’s a bit less).
> 
> >Looking at the changes for #361, there's the changes for wrap-mark,
> >and copy-wait.  The latter was just this:
> 
> I did…
> 
> begin 644 xterm_362-1.0.1.debdiff
...
> … to revert that, and voilà, problem fixed.
> 
> Perhaps some events are lost with XCheckWindowEvent or something?

The descriptions for XWindowEvent and XCheckWindowEvent are very similar.
I'm guessing that it's timing, e.g., xterm could wait a few milliseconds
to retry and then give up on that loop, in case the window events don't
arrive rapidly enough.

-- 
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net
ftp://ftp.invisible-island.net

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