Subject: Re: bug#23925: 25.0.95; display broken when maximizing frame

From: Dmitry Gutov <[email-masked]>
Date: Thu, 22 Nov 2018 16:12:42 +0200

Hi all,

On 09.07.2016 12:45, Clément Pit--Claudel wrote:

> - Resizing the frames using the handles works fine
> - Maximizing the frame causes the maximized region to not be redisplayed
> - Running the following on a non-maximized frame) also causes a display glitch:
>      (set-face-attribute 'default nil :height 150)
>    (when the frame extends to accommodate the larger font size, the newly added areas do not get redisplayed)
> - I have attached a two screenshots showing how the maximized frame looks. The top left (corresponding to the previous size) is properly updated, while the rest of the frame displays what was on the screen when the frame was maximized
> - Not sure if it's related or if it should be another bug: font anti-aliasing is not the same when when maximized and unmaximized (see screenshots).

I have just tried a --with-cairo build of the latest master, and can't 
repro any of the symptoms described here, as long as Emacs is launched 
with GDK_SCALE=1 (I have a HiDPI screen, and redisplay with scale=2 
looks very broken).