Bug#941123: gdm3: action-middle-click-titlebar 'lower' is ignored: can't set window to lower on title bar middle-click

[Conrad J.C. Hughes (for Debian package stuff)]

Package: gdm3
Version: 3.30.2-3
Severity: normal

Dear Maintainer,

In previous incarnations of Debian, middle-clicking on the title bar lowered
windows (moved them to the back of the stack, making other windows visible).
More recently this was relegated to a "tweak".  Now even that doesn't work.

Using either the tweaks app, a manual edit of gtk-*.0/settings.ini, or the
command line

  dconf write /org/gnome/desktop/wm/preferences/action-middle-click-titlebar
"'lower'"

.. it should be possible to configure middle clicking on a title bar to lower
the window in question.  This no longer works.  Other values, such as
"minimize", do still work.

It would be nice if "lower" functionality could be restored.

Best,
Conrad



-- System Information:
Debian Release: 10.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-6-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gdm3 depends on:
ii  accountsservice                       0.6.45-2
ii  adduser                               3.118
ii  cinnamon [x-window-manager]           3.8.8-1
ii  cinnamon-session [x-session-manager]  3.8.2-1
ii  dconf-cli                             0.30.1-2
ii  dconf-gsettings-backend               0.30.1-2
ii  debconf [debconf-2.0]                 1.5.71
ii  gir1.2-gdm-1.0                        3.30.2-3
ii  gnome-session [x-session-manager]     3.30.1-2
ii  gnome-session-bin                     3.30.1-2
ii  gnome-settings-daemon                 3.30.2-3
ii  gnome-shell                           3.30.2-9
ii  gnome-terminal [x-terminal-emulator]  3.30.2-2
ii  gsettings-desktop-schemas             3.28.1-1
ii  libaccountsservice0                   0.6.45-2
ii  libaudit1                             1:2.8.4-3
ii  libc6                                 2.28-10
ii  libcanberra-gtk3-0                    0.30-7
ii  libcanberra0                          0.30-7
ii  libgdk-pixbuf2.0-0                    2.38.1+dfsg-1
ii  libgdm1                               3.30.2-3
ii  libglib2.0-0                          2.58.3-2+deb10u1
ii  libglib2.0-bin                        2.58.3-2+deb10u1
ii  libgtk-3-0                            3.24.5-1
ii  libkeyutils1                          1.6-6
ii  libpam-modules                        1.3.1-5
ii  libpam-runtime                        1.3.1-5
ii  libpam-systemd                        241-7~deb10u1
ii  libpam0g                              1.3.1-5
ii  librsvg2-common                       2.44.10-2.1
ii  libselinux1                           2.8-1+b1
ii  libsystemd0                           241-7~deb10u1
ii  libwrap0                              7.6.q-28
ii  libx11-6                              2:1.6.7-1
ii  libxau6                               1:1.0.8-1+b2
ii  libxcb1                               1.13.1-2
ii  libxdmcp6                             1:1.1.2-3
ii  lsb-base                              10.2019051400
ii  metacity [x-window-manager]           1:3.30.1-2
ii  muffin [x-window-manager]             3.8.2-1
ii  mutter [x-window-manager]             3.30.2-7
ii  policykit-1                           0.105-25
ii  procps                                2:3.3.15-2
ii  ucf                                   3.0038+nmu1
ii  x11-common                            1:7.7+19
ii  x11-xserver-utils                     7.7+8
ii  xfce4-session [x-session-manager]     4.12.1-6
ii  xfce4-terminal [x-terminal-emulator]  0.8.7.4-2
ii  xfwm4 [x-window-manager]              4.12.5-1
ii  xterm [x-terminal-emulator]           344-1

Versions of packages gdm3 recommends:
ii  at-spi2-core    2.30.0-7
ii  desktop-base    10.0.2
ii  x11-xkb-utils   7.7+4
ii  xserver-xephyr  2:1.20.4-1
ii  xserver-xorg    1:7.7+19
ii  zenity          3.30.0-2

Versions of packages gdm3 suggests:
ii  gnome-orca            3.30.1-1
pn  libpam-fprintd        <none>
ii  libpam-gnome-keyring  3.28.2-5

-- debconf information:
  gdm3/daemon_name: /usr/sbin/gdm3
* shared/default-x-display-manager: gdm3