bug#23925: 25.0.95; display broken when maximizing frame

[Dmitry Gutov]

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).