Bug#836845: libgtk-3-0: Improper resolution when going to fullscreen with HiDPI (MacBook Retina) screen

[Emmanuel Fleury]

Package: libgtk-3-0
Version: 3.21.5-3
Severity: normal

Dear Maintainer,

I have a MacBook (with a Retina screen 2560x1600) running an unstable
Debian with Gnome3 and GDK3/Gtk+3.

I noticed that all my presentation software (namely evince or
pdf-presenter-console) were behaving wrongly when switching to
'presentation' mode.  I seems that the resolution was switched to a
lower one and only the upper-left quarter of the slides were visible on
the screen.

After a quite lengthy research to locate the problem, I found this hint
and applied it to my ~/.bashrc, and everything went nicely again:

    https://wiki.archlinux.org/index.php/HiDPI#GDK_3_.28GTK.2B_3.29

I do not know if it is a "bug", but it would be nice to connect the
auto-detection of HiDPI integrated in Gnome3 with these variables in GDK3.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.1 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libgtk-3-0 depends on:
ii  adwaita-icon-theme                      3.21.91-1
ii  hicolor-icon-theme                      0.15-1
ii  libatk-bridge2.0-0                      2.20.1-4
ii  libatk1.0-0                             2.21.90-2
ii  libc6                                   2.24-2
ii  libcairo-gobject2                       1.14.6-1+b1
ii  libcairo2                               1.14.6-1+b1
ii  libcolord2                              1.3.2-1
ii  libcups2                                2.1.4-4
ii  libepoxy0                               1.3.1-1
ii  libfontconfig1                          2.11.0-6.7
ii  libfreetype6                            2.6.3-3+b1
ii  libgdk-pixbuf2.0-0                      2.34.0-1
ii  libglib2.0-0                            2.49.6-1
ii  libgtk-3-common                         3.21.5-3
ii  libjson-glib-1.0-0                      1.2.2-1
ii  libpango-1.0-0                          1.40.2-1
ii  libpangocairo-1.0-0                     1.40.2-1
ii  libpangoft2-1.0-0                       1.40.2-1
ii  librest-0.7-0                           0.8.0-1
ii  libsoup2.4-1                            2.55.90-1
ii  libwayland-client0                      1.11.0-2
ii  libwayland-cursor0                      1.11.0-2
ii  libwayland-egl1-mesa [libwayland-egl1]  11.2.2-1
ii  libx11-6                                2:1.6.3-1
ii  libxcomposite1                          1:0.4.4-1
ii  libxcursor1                             1:1.1.14-1+b1
ii  libxdamage1                             1:1.1.4-2+b1
ii  libxext6                                2:1.3.3-1
ii  libxfixes3                              1:5.0.2-1
ii  libxi6                                  2:1.7.6-1
ii  libxinerama1                            2:1.1.3-1+b1
ii  libxkbcommon0                           0.6.1-1
ii  libxml2                                 2.9.4+dfsg1-1+b1
ii  libxrandr2                              2:1.5.0-1
ii  shared-mime-info                        1.6-1

Versions of packages libgtk-3-0 recommends:
ii  libgtk-3-bin  3.21.5-3

Versions of packages libgtk-3-0 suggests:
ii  gvfs             1.29.91-1
ii  librsvg2-common  2.40.16-1

-- no debconf information