Bug#874526: Keyboard grab doesn't work under Wayland

[Josh Triplett]

Package: gnome-boxes
Version: 3.25.91-1
Severity: serious

[I don't know whether this bug lies in gnome-boxes or gnome-shell or
some combination of both. Release-critical because this completely
breaks the ability to log into many Windows VMs with gnome-boxes under
the default GNOME Wayland session.]

The mechanism gnome-boxes uses to grab the keyboard doesn't work under
the default GNOME Wayland session. This makes it impossible to send
Ctrl-Alt-Delete; it always goes to gnome-shell instead.

(It might also help to add Ctrl-Alt-Delete to the list of shortcuts
provided in the gnome-boxes keyboard menu, alongside Ctrl-Alt-Backspace
and similar.)

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.12.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnome-boxes depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.26.0-2+b1
ii  libarchive13                                 3.2.2-2
ii  libc6                                        2.24-17
ii  libcairo-gobject2                            1.14.10-1
ii  libcairo2                                    1.14.10-1
ii  libgdk-pixbuf2.0-0                           2.36.5-4
ii  libglib2.0-0                                 2.53.6-1
ii  libgovirt2                                   0.3.4-2
ii  libgtk-3-0                                   3.22.19-1
ii  libgtk-vnc-2.0-0                             0.7.1-1
ii  libgudev-1.0-0                               232-1
ii  libosinfo-1.0-0                              1.1.0-1
ii  libosinfo-bin                                1.1.0-1
ii  libpango-1.0-0                               1.40.11-1
ii  libpangocairo-1.0-0                          1.40.11-1
ii  librest-0.7-0                                0.8.0-2
ii  libsecret-1-0                                0.18.5-3.1
ii  libsoup2.4-1                                 2.59.90.1-1
ii  libspice-client-glib-2.0-8                   0.34-1.1
ii  libspice-client-gtk-3.0-5                    0.34-1.1
ii  libtracker-sparql-1.0-0                      1.12.1-1
ii  libusb-1.0-0                                 2:1.0.21-2
ii  libvirt-daemon                               3.6.0-1
ii  libvirt-glib-1.0-0                           1.0.0-1
ii  libxml2                                      2.9.4+dfsg1-4
ii  mtools                                       4.0.18-2+b1
ii  tracker                                      1.12.1-1

Versions of packages gnome-boxes recommends:
ii  qemu-system-x86  1:2.8+dfsg-7

gnome-boxes suggests no packages.

-- no debconf information