GNU bug report logs - #61667
29.0.60; Failure to redisplay

Previous Next

Full log

View this message in rfc822 format

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Po Lu <luangruo <at> yahoo.com>, Gregory Heytings <gregory <at> heytings.org>
Cc: 61667 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: bug#61667: 29.0.60; Failure to redisplay
Date: Tue, 28 Feb 2023 19:59:24 +0200

On 28/02/2023 12:31, Po Lu wrote:
> Gregory Heytings <gregory <at> heytings.org> writes:
> 
>> Thanks!  After seeing this, I'm now convinced that the problem is not
>> a GNOME one, for two reasons:
>>
>> 1.  The effect of (insert "!") (redisplay) is immediately visible on
>> screen.  Why would GNOME treat the effect of changing the buffer from
>> *scratch* to xassociations.rb differently?
> 
> If you insert "!", the frame title does not change, right?
"!" is inserted in the same buffer the command is invoked from - so the 
title shouldn't change at that point yet.

> Everything points to this being a bug somewhere in Mutter: how damage to
> surrounding windows (including obscured ones) prevents it from showing
> up, and how it doesn't show up in an undecorated frame.

Why does constant frame-title-format fix this, though?

> Dimitry, do you see any delay between the change in the frame title and
> when ``Test 2'' becomes visible?  With and without double buffering, and
> with and without `undecorated' set to `t'?
> 
>    (progn
>      (sleep-for 1)
>      (setq frame-title-format icon-title-format)
>      (insert "Test 1")
>      (force-mode-line-update)
>      (redisplay)
>      (sleep-for 1)
>      (setq frame-title-format "test title")
>      (insert "Test 2")
>      (force-mode-line-update)
>      (redisplay))

I have tried this with default config (double buffering on, undecorated 
off), and I don't see any delay between text insertion and frame title 
changes. 1 second pause, "Test 1" is inserted, the title changes (*), 1 
second pause, "Test 2" is inserted, the title changes.

That probably means I don't need to test the alternative configs, right?

(*) By default frame-title-format is eq to icon-title-format, so with 
'emacs -Q' the title doesn't actually change on the first step. I tried 
both this scenario and the scenario with swapped frame-title-format 
assignments. In both the second insertion of "Test 2" coincides with the 
title change to "test title".

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.