Comment 2 for bug 917320

From UbiquityDM.txt

Backtrace:
0: X (xorg_backtrace+0x26) [0x460566]
1: X (0x400000+0x64b6a) [0x464b6a]
2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f299582b000+0x10060) [0x7f299583b060]
3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7f298e972000+0x6ee9) [0x7f298e978ee9]
4: X (WakeupHandler+0x5b) [0x433a6b]
5: X (WaitForSomething+0x1b6) [0x45e016]
6: X (0x400000+0x2f912) [0x42f912]
7: X (0x400000+0x232fe) [0x4232fe]
8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7f299475430d]
9: X (0x400000+0x235ed) [0x4235ed]
Segmentation fault at address (nil)

Caught signal 11 (Segmentation fault). Server aborting

Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

 ddxSigGiveUp: Closing log

Gdk-WARNING **: panel: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.

Gdk-WARNING **: wallpaper: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.

Gdk-WARNING **: nm-applet: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.

XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 29 requests (29 known processed) with 0 events remaining.
Window manager warning: Fatal IO error 11 (Resource temporarily unavailable) on display ':0'.
g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.