GNU bug report logs - #28589
27.0.50; Emacs screen often becomes blank

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#28589: closed (27.0.50; Emacs screen often becomes blank)
Date: Tue, 26 Sep 2017 18:32:01 +0000

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Your message dated Tue, 26 Sep 2017 18:31:37 +0000
with message-id <CAArVCkTs_wy4vFDquhwhfRyjjL=++-KELhABz=sswbi4upLeWA <at> mail.gmail.com>
and subject line Re: bug#28589: 27.0.50; Emacs screen often becomes blank
has caused the debbugs.gnu.org bug report #28589,
regarding 27.0.50; Emacs screen often becomes blank
to be marked as done.

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From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; Emacs screen often becomes blank
Date: Mon, 25 Sep 2017 10:01:30 +0900

Hi,

Emacs screen often becomes blank or blinks.  This didn't happen
the last weekend, doesn't happen sometimes but often happens.
Changing the window configuration --- scrolling a window, showing
a message of two or more lines in the echo area, etc. --- seems
to cause it.  More funny thing is, when two Emacsen are running,
the one of which the frame is not selected becomes blank.
Typing any key in the selected blank frame will help, as if
(sit-for ∞) is running.

Thanks.

In GNU Emacs 27.0.50 (build 1, i686-pc-cygwin, GTK+ Version 3.18.9)
 of 2017-09-25 built on localhost
Windowing system distributor 'The Cygwin/X Project', version 11.0.11900000

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From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: Katsumi Yamaoka <yamaoka <at> jpl.org>, 28589-done <at> debbugs.gnu.org
Subject: Re: bug#28589: 27.0.50; Emacs screen often becomes blank
Date: Tue, 26 Sep 2017 18:31:37 +0000

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Katsumi Yamaoka <yamaoka <at> jpl.org> schrieb am Di., 26. Sep. 2017 um
06:44 Uhr:

> On Mon, 25 Sep 2017 10:01:30 +0900, Katsumi Yamaoka wrote:
> > Emacs screen often becomes blank or blinks.  This didn't happen
> > the last weekend, doesn't happen sometimes but often happens.
> > Changing the window configuration --- scrolling a window, showing
> > a message of two or more lines in the echo area, etc. --- seems
> > to cause it.  More funny thing is, when two Emacsen are running,
> > the one of which the frame is not selected becomes blank.
> > Typing any key in the selected blank frame will help, as if
> > (sit-for ∞) is running.
>
> Reverting the change c0af83b[1] solves this problem.
>
> [1]
> Don't attempt to disable double buffering in newer GTK+ versions
> <http://lists.gnu.org/archive/html/emacs-diffs/2017-09/msg00293.html>
>
>
Sigh, I had almost expected this would happen. Reverted with 2fa19cc551.
But now we have another time bomb in the codebase:
the gtk_widget_set_double_buffered function is deprecated and will probably
be removed sometime. This makes the migration to a pure GTK+ build even
more pressing.

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