Reproducable with:

$ x86_64-softmmu/qemu-system-x86_64 \
    -kernel $vmlinuz_of_your_choice \
    -append vga=0x313 -sdl

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>