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bug#28589: 27.0.50; Emacs screen often becomes blank

From: Philipp Stephani
Subject: bug#28589: 27.0.50; Emacs screen often becomes blank
Date: Tue, 26 Sep 2017 18:31:37 +0000

Katsumi Yamaoka <address@hidden> 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.

Don't attempt to disable double buffering in newer GTK+ versions

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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