crashes with dual displays and no xinerama

[discord]

Binary package hint: gnome-screensaver

Whenever I choose system->prefrences->screensaver my whole xserver crashes. It does not crash with my single display.

http://en.wikipedia.org/wiki/Xinerama#Dual_display_X_without_Xinerama

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Files"
 FontPath "/usr/share/X11/fonts/misc"
 FontPath "/usr/share/X11/fonts/cyrillic"
 FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
 FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
 FontPath "/usr/share/X11/fonts/Type1"
 FontPath "/usr/share/X11/fonts/100dpi"
 FontPath "/usr/share/X11/fonts/75dpi"
 FontPath "/usr/share/fonts/X11/misc"
 # path to defoma fonts
 FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
 Load "i2c"
 Load "bitmap"
 Load "ddc"
 Load "dri"
 Load "extmod"
 Load "freetype"
 Load "glx"
 Load "int10"
 Load "type1"
 Load "vbe"
EndSection

Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver "kbd"
 Option "CoreKeyboard"
 Option "XkbRules" "xorg"
 Option "XkbModel" "pc104"
 Option "XkbLayout" "us"
EndSection

Section "InputDevice"
 Identifier "Configured Mouse"
 Driver "mouse"
 Option "CorePointer"
 Option "Device" "/dev/input/mice"
 Option "Protocol" "ExplorerPS/2"
 Option "ZAxisMapping" "4 5"
 Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
 Identifier "Synaptics Touchpad"
 Driver "synaptics"
 Option "SendCoreEvents" "true"
 Option "Device" "/dev/psaux"
 Option "Protocol" "auto-dev"
 Option "HorizScrollDelta" "0"
EndSection

Section "InputDevice"
  Driver "wacom"
  Identifier "stylus"
  Option "Device" "/dev/wacom" # Change to
                                                      # /dev/input/event
                                                      # for USB
  Option "Type" "stylus"
  Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
  Driver "wacom"
  Identifier "eraser"
  Option "Device" "/dev/wacom" # Change to
                                                      # /dev/input/event
                                                      # for USB
  Option "Type" "eraser"
  Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
  Driver "wacom"
  Identifier "cursor"
  Option "Device" "/dev/wacom" # Change to
                                                      # /dev/input/event
                                                      # for USB
  Option "Type" "cursor"
  Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "Device"
 Identifier "Intel Corporation Mobile Integrated Graphics Controller"
 Driver "i810"
 BusID "PCI:0:2:0"
EndSection

Section "Monitor"
 Identifier "Generic Monitor"
 Option "DPMS"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Device "Intel Corporation Mobile Integrated Graphics Controller"
 Monitor "Generic Monitor"
 DefaultDepth 24
 SubSection "Display"
  Depth 1
  Modes "1280x800" "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 4
  Modes "1280x800" "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 8
  Modes "1280x800" "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 15
  Modes "1280x800" "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 16
  Modes "1280x800" "1024x768" "800x600" "640x480"
 EndSubSection
 SubSection "Display"
  Depth 24
  Modes "1280x800" "1024x768" "800x600" "640x480"
 EndSubSection
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
 InputDevice "Generic Keyboard"
 InputDevice "Configured Mouse"
 InputDevice "stylus" "SendCoreEvents"
 InputDevice "cursor" "SendCoreEvents"
 InputDevice "eraser" "SendCoreEvents"
 InputDevice "Synaptics Touchpad"
EndSection

Section "DRI"
 Mode 0666
EndSection

Ill post an xorg log file soon but I dont think the log has any information about the bug.

[Václav Šmilauer (eudoxos)]

Since it is xserver that crashes, it is not a bug in gnome-screensaver. Client should never be able to crash the server. I confirm this here (with oowriter starting) and will try to link to freedesktop #8537, that has already a patch.

Discord: please provide your Xorg.0.log, it has valuable information about the crash at the end, so that we can confirm it is the same bug.

[Václav Šmilauer (eudoxos)]

Well, I did not manage to add the watcher, this is the direct link:
https://bugs.freedesktop.org/show_bug.cgi?id=8537.

I attach my crash file; the backtrace is exactly the same as on freedesktop (ending with X(FontFileCompleteXLFD+0xad).