GNU bug report logs - #17876
24.3; Incorrect frame resize

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: penthief <penthief <at> SDF.ORG>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; Incorrect frame resize
Date: Sun, 29 Jun 2014 15:50:54 +0100

When setting the a font on a frame after a resize, there is an apparent
race condition that more often than not, causes the frame height and/or 
width to be reset to an incorrect value.

This behaviour also occurs on 24.3.92.

1. Create a file bug-frame-resize.el with the following contents 
(assuming that Courier and Monaco are present on the system).

(setq -last-used-font nil)
(setq -target-font-1 "Courier")
(setq -target-font-2 "Monaco")
(setq -target-height 5)
(setq -target-width 5)

(defun bug-frame-resize ()
  (interactive)
  (with-selected-frame (make-frame)
    (set-frame-width (selected-frame) -target-width)
    (set-frame-height (selected-frame) -target-height)
    (let ((target-font (if (equal -last-used-font -target-font-1)
			   -target-font-2
			 -target-font-1)))
      (setq -last-used-font target-font)
      (set-frame-font target-font))))

2. Start emacs

$ /usr/bin/emacs24-x -Q -l bug-frame-resize.el

3. Type "M-x bug-frame-resize" four or five times.

The frames appear with the correct size briefly, but then resize after a 
split second. On this machine this usually results one of the height or 
width is incorrect on each of the created frames.

The bug requires the font to be changed when creating the frame.

In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.10.7)
 of 2014-03-07 on lamiak, modified by Debian
Windowing system distributor `The X.Org Foundation', version 
11.0.11501000
System Description:	Ubuntu 14.04 LTS

Configured using:
 `configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-linux-gnu'
 '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
 '--localstatedir=/var/lib' '--infodir=/usr/share/info'
 '--mandir=/usr/share/man' '--with-pop=yes'
 
'--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.3/site-lisp:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
 '--with-x-toolkit=gtk3' '--with-toolkit-scroll-bars'
 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
 --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'
 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro'
 'CPPFLAGS=-D_FORTIFY_SOURCE=2''

Important settings:
  value of $LC_CTYPE: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x r e - e - b <tab> <return>

Recent messages:
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Message #8 received at 17876 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: penthief <penthief <at> SDF.ORG>
Cc: 17876 <at> debbugs.gnu.org
Subject: Re: bug#17876: 24.3; Incorrect frame resize
Date: Fri, 04 Dec 2020 12:46:37 +0100

penthief <penthief <at> SDF.ORG> writes:

> When setting the a font on a frame after a resize, there is an apparent
> race condition that more often than not, causes the frame height
> and/or width to be reset to an incorrect value.
>
> This behaviour also occurs on 24.3.92.
>
> 1. Create a file bug-frame-resize.el with the following contents
> (assuming that Courier and Monaco are present on the system).
>
> (setq -last-used-font nil)
> (setq -target-font-1 "Courier")
> (setq -target-font-2 "Monaco")
> (setq -target-height 5)
> (setq -target-width 5)
>
> (defun bug-frame-resize ()
>   (interactive)
>   (with-selected-frame (make-frame)
>     (set-frame-width (selected-frame) -target-width)
>     (set-frame-height (selected-frame) -target-height)
>     (let ((target-font (if (equal -last-used-font -target-font-1)
> 			   -target-font-2
> 			 -target-font-1)))
>       (setq -last-used-font target-font)
>       (set-frame-font target-font))))
>
> 2. Start emacs
>
> $ /usr/bin/emacs24-x -Q -l bug-frame-resize.el
>
> 3. Type "M-x bug-frame-resize" four or five times.
>
> The frames appear with the correct size briefly, but then resize after
> a split second. On this machine this usually results one of the height
> or width is incorrect on each of the created frames.

(This bug report unfortunately got no response at the time.)

I tried reproducing this in Emacs 28 on Debian/bullseye, but was unable
to.  All the Monaco frames have the exact same width/height, and so do
all the Courier frames.

Do you still see this issue in more recent Emacs versions?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #13 received at 17876 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: 17876 <at> debbugs.gnu.org
Subject: Re: bug#17876: 24.3; Incorrect frame resize
Date: Fri, 04 Dec 2020 13:15:34 +0100

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> I tried reproducing this in Emacs 28 on Debian/bullseye, but was unable
> to.  All the Monaco frames have the exact same width/height, and so do
> all the Courier frames.
>
> Do you still see this issue in more recent Emacs versions?

The address bounced, so it seems unlikely that we'll make more progress
here, and I'm closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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