Bug#798433: qemu-system-x86: kvm's std graphical interface broken for greater one than SVGA

[Thomas Schlegel]

I've a pinned system. Most packages are from stable. Relevant upgraded 
Packages (I think so):

                                     before                   after
dbus                               1.8.18-0+deb8u1 1.8.20-0+deb8u1
dbus-x11                           1.8.18-0+deb8u1 1.8.20-0+deb8u1
gir1.2-gtkpixbuf-2.0               2.31.1-2 2.31.1-2+deb8u2
gir1.2-gtk3.0                      3.14.5-1 3.14.5-1+deb8u1
libdbus-1-3                        1.8.18-0+deb8u1 1.8.20-0+deb8u1
libegl1-mesa                       10.3.2-1 10.3.2-1+deb8u1
libegl1-mesa-drivers               10.3.2-1 10.3.2-1+deb8u1
libgbm1                            10.3.2-1 10.3.2-1+deb8u1
libgdk-pixbuf2.0-0                 2.31.1-2+b1 2.31.1-2+deb8u2
libgdk-pixbuf2.0-common            2.31.1-2 2.31.1-2+deb8u2
libgl1-mesa-dri                    10.3.2-1 10.3.2-1+deb8u1
libgl1-mesa-glx                    10.3.2-1 10.3.2-1+deb8u1
libglapi-mesa                      10.3.2-1 10.3.2-1+deb8u1
libgles1-mesa                      10.3.2-1 10.3.2-1+deb8u1
libgles2-mesa                      10.3.2-1 10.3.2-1+deb8u1
libgtk-3-0                         3.14.5-1 3.14.5-1+deb8u1
libgtk-3-bin                       3.14.5-1 3.14.5-1+deb8u1
libgtk-3-common                    3.14.5-1 3.14.5-1+deb8u1
libudev-1.0-0                      215-17+deb8u1 215-17+deb8u2
libopenvg1-mesa                    10.3.2-1 10.3.2-1+deb8u1
libudev1                           215-17+deb8u1 215-17+deb8u2
libvirt-clients                    1.2.9-9 1.2.9-9+deb8u1
libvirt-daemon                     1.2.9-9 1.2.9-9+deb8u1
libvirt-daemon-system              1.2.9-9 1.2.9-9+deb8u1
libvirt0                           1.2.9-9 1.2.9-9+deb8u1
qemu-kvm                           1.2.3+dfsg-6a 1.2.4+dfsg-1a
qemu-system-common                 1.2.3+dfsg-6a 1.2.4+dfsg-1a
qemu-utils                         1.2.3+dfsg-6a 1.2.4+dfsg-1a
systemd                            215-17+deb8u1 215-17+deb8u2
systemd-sysv                       215-17+deb8u1 215-17+deb8u2
xserver-xorg-video-modesetting     0.9.0-1+b1            0.9.0-2