bug#61667: 29.0.60; Failure to redisplay

[Eli Zaretskii]

> Date: Sun, 16 Apr 2023 15:52:51 +0300
> Cc: luangruo@yahoo.com, 61667@debbugs.gnu.org, gregory@heytings.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> 
> On 16/04/2023 09:01, Eli Zaretskii wrote:
> >> Date: Sun, 16 Apr 2023 03:48:56 +0300
> >> From: Dmitry Gutov<dgutov@yandex.ru>
> >> Cc: Gregory Heytings<gregory@heytings.org>, Eli Zaretskii<eliz@gnu.org>,
> >>   Po Lu<luangruo@yahoo.com>
> >>
> >> - Do some search using 'C-x p g', wait to see the results buffer
> >> displayed but it's not displayed for a while. I look at the title bar -
> >> and it already says*xref*, but the frame is still not updated. If I
> >> press something like 'C-n' or 'C-f' now, that triggers the necessary
> >> refresh.
> >>
> >> - When the said Xref buffers is selected, I press 'q'. Likewise, the
> >> frame might not get updated for a while, still showing the previous
> >> window configuration until I issue the next command.
> >>
> >> These are of course random and don't happen every time. Often enough to
> >> be annoying, though.
> > Is this with or without double-buffering?  If it's with
> > double-buffering, do the problems go away if you disable
> > double-buffering?
> 
> Good question: the above failure scenario reproduces even without XDBE. 
> The frequency is about the same as with XDBE.

Thanks.  Next question: does it reproduce easily in "emacs -Q"?