Re: Emacs's set-frame-size can not work well with gnome-shell?

[Dmitry Gutov]

On 26.01.2020 20:38, martin rudalics wrote:
> Don't you have some old laptop somwehere where you could try the
> experiments without scaling (I'd never believe that changing scaling
> on-the-fly works always in a reproducible fashion).

So, I tried this stuff on an old laptop. Ubuntu 16.04, with whatever 
version of Unity was there, as well as with GNOME Shell 3.18 (and the 
same version of GTK3 in both cases). No scaling.

Unity:

Child frame resizes fine, just like in all other DEs aside from Mutter, 
apparently.

GNOME:

Child frame does not resize, even using these rather old GNOME Mutter 
and GTK.

Dragging a normal un-decorated Lucid frame is smooth-ish (with pauses). 
Although I hadn't tried the more involved experiment involving a child 
frame.

In both:

Normal un-decorated frames have exactly the same drag-resizing behavior 
problem that I described before, so it's definitely not HiDPI-related.