No Font Dialog

[AW <alexander.willand@t-online.de>]

Hi!

struggeling with a high dpi screen on a new computer. Linux, 5.14., KDE, 
wayland (distro: opensuse, tumbleweed). 

I thought that increasing the font size of Emacs might help. 

If I click in the menu bar on Options/Set Default Font... , the usual font 
dialog doesn't appear, only a »Font Menu« with »Misc«, »Courier« and »Font 
Set«. 

Every time in a terminal I get the notice: 
»(emacs:9468): Gtk-WARNING **: 09:13:00.966: no trigger event for menu popup«. 

Doesn't work in a gnome session either. 

So it seems there is something wrong with my self compiled Emacs, or is it a 
bug? 

»(pgtk-backend-display-class)« gives: »"GdkWaylandDisplay"«.

Building emacs (branch feature/pgtk) or from here: 
https://github.com/flatwhatson/emacs

Result: 
»GNU Emacs 28.0.60 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo 
version 1.16.0)  of 2021-11-15«

Configure: 
»./configure --with-dbus --with-gif --with-jpeg --with-png --with-rsvg --with-
tiff --with-xft --with-xpm --with-modules --with-native-compilation --with-
json --with-imagemagick --with-libsystemd --with-pgtk --with-x-toolkit=gtk3«

I'm aware that this might be slightly wrong, but until recently it worked. 

Result of configure: 
»Configured for 'x86_64-pc-linux-gnu'.

  Where should the build process find the source code?    .
  What compiler should emacs be built with?               gcc -g3 -O2
  Should Emacs use the GNU version of malloc?             no
    (The GNU allocators don't work with this system configuration.)
  Should Emacs use a relocating allocator for buffers?    no
  Should Emacs use mmap(2) for buffer allocation?         no
  What window system should Emacs use?                    pgtk
  What toolkit should Emacs use?                          GTK3
  Where do we find X Windows header files?                Standard dirs
  Where do we find X Windows libraries?                   Standard dirs
  Does Emacs use -lXaw3d?                                 no
  Does Emacs use -lXpm?                                   no
  Does Emacs use -ljpeg?                                  yes
  Does Emacs use -ltiff?                                  yes
  Does Emacs use a gif library?                           yes -lgif
  Does Emacs use a png library?                           yes -lpng12 
  Does Emacs use -lrsvg-2?                                yes
  Does Emacs use -lwebp?                                  no
  Does Emacs use cairo?                                   yes
  Does Emacs use -llcms2?                                 no
  Does Emacs use imagemagick?                             yes
  Does Emacs use native APIs for images?                  no
  Does Emacs support sound?                               yes
  Does Emacs use -lgpm?                                   no
  Does Emacs use -ldbus?                                  yes
  Does Emacs use -lgconf?                                 no
  Does Emacs use GSettings?                               yes
  Does Emacs use a file notification library?             yes -lglibc 
(inotify)
  Does Emacs use access control lists?                    no
  Does Emacs use -lselinux?                               yes
  Does Emacs use -lgnutls?                                yes
  Does Emacs use -lxml2?                                  yes
  Does Emacs use -lfreetype?                              yes
  Does Emacs use HarfBuzz?                                yes
  Does Emacs use -lm17n-flt?                              
  Does Emacs use -lotf?                                   yes
  Does Emacs use -lxft?                                   
  Does Emacs use -lsystemd?                               yes
  Does Emacs use -ljansson?                               yes
  Does Emacs use the GMP library?                         yes
  Does Emacs directly use zlib?                           yes
  Does Emacs have dynamic modules support?                yes
  Does Emacs use toolkit scroll bars?                     yes
  Does Emacs support Xwidgets?                            no
  Does Emacs have threading support in lisp?              yes
  Does Emacs support the portable dumper?                 yes
  Does Emacs support legacy unexec dumping?               no
  Which dumping strategy does Emacs use?                  pdumper
  Does Emacs have native lisp compiler?                   yes«

So is this a bug or a mistake by my way of compiling emacs? 

By the way, I can start emacs with readable letter with 
»GDK_DPI_SCALE=1.7 emacs &«

And I installed the package default-text-scale from melpa, which also helps. 
So fortunately I can do my work. 

Kind Regards,

Alexander