Bug#742510: xserver-xorg-video-cirrus: fails rendering xdm login fonts

[Gabriele Giacone <1o5g4r8o@gmail.com>]

Package: xserver-xorg-video-cirrus
Version: 1:1.5.2-1+b2
Severity: normal

Dear Maintainer,

to reproduce install a jessie/sid qemu VM with Cirrus video card.

On VM:
# apt-get install xdm
# echo /usr/bin/xdm >/etc/X11/default-display-manager
# /etc/init.d/xdm restart

Username one types in will not be displayed and once pressed enter
greeting and prompt fonts will not be displayed as well.

# apt-get install devscripts
# debsnap -v -d. --binary -a amd64 xserver-xorg-video-cirrus 1:1.4.0-2
# dpkg -i --force-depends xserver-xorg-video-cirrus_1.4.0-2_amd64.deb
# /etc/init.d/xdm restart

Downgrading to 1.4.0-2, fonts are displayed well.
Another workaround is switching to standard VGA card.