Bug#727557: gnome-screensaver: Unlocking crashes Gnome in dual monitor setup (but only when built-in is turned off)

[Lech Karol Pawłaszek]

Package: gnome-screensaver
Version: 3.6.1-1
Severity: normal

Dear Maintainer,

Usually unlocking crashes Gnome and after a while gdm as well. After
that I am unable to restart gdm (it doesn't do anything) and have to
restart the machine. Such situation happens only in my specific 
configuration, that is when I have external monitor attached and 
built-in lcd display turned off. If I have both displays turned on
or am using only built-in display and external unattached - unlocking
works just fine.

I have experienced this issue on sysvinit and systemd as well. I 
didn't have such issue using Gnome 3.6.

Kind regards,

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

Kernel: Linux 3.2.0-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnome-screensaver depends on:
ii  dbus-x11                   1.6.16-1
ii  gnome-icon-theme           3.10.0-1
ii  gnome-session-bin          3.8.4-2
ii  gsettings-desktop-schemas  3.8.2-2
ii  libc6                      2.17-93
ii  libcairo2                  1.12.16-2
ii  libdbus-1-3                1.6.16-1
ii  libdbus-glib-1-2           0.100.2-1
ii  libgdk-pixbuf2.0-0         2.28.2-1
ii  libglib2.0-0               2.36.4-1
ii  libgnome-desktop-3-7       3.8.4-2
ii  libgnomekbd8               3.6.0-1
ii  libgtk-3-0                 3.8.6-1
ii  libpam0g                   1.1.3-10
ii  libx11-6                   2:1.6.2-1
ii  libxext6                   2:1.3.2-1
ii  libxklavier16              5.2.1-1
ii  libxxf86vm1                1:1.1.3-1

Versions of packages gnome-screensaver recommends:
ii  gnome-power-manager   3.8.2-1
ii  libpam-gnome-keyring  3.8.2-2

gnome-screensaver suggests no packages.

-- no debconf information