[Bug 30248] Login dies with a11y enabled

[Don Scorgie]

Public bug reported:
https://launchpad.net/malone/bugs/30248

Affects: gnome-session (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
Sometime in the last 2 days, logging into GNOME with accessibility has
died.  When logging in, the gdm screen goes away and the login sound
plays.  Then nothing.  Looking in ~/.xsession-errors reveals:

/etc/gdm/PreSession/Default: Registering your session with wtmp and utmp
/etc/gdm/PreSession/Default: running: /usr/bin/sessreg -a -w /var/log/wtmp -u /var/run/utmp -x "/var/lib/gdm/:20.Xservers" -h "" -l ":20" "beta"
/etc/gdm/Xsession: Beginning session setup...
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_old.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_std.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_old.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_std.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_old.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_std.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_old.h' is not found
Predefined macro file '/usr/lib/gcc/i486-linux-gnu/4.0.3/include/mcpp_gcc40_predef_std.h' is not found
Bonobo accessibility support initialized
GTK Accessibility Module initialized

** ERROR **: Accessibility app error: exception during registry activation from
id: IDL:Bonobo/GeneralError:1.0

aborting...
Bonobo accessibility support initialized
GTK Accessibility Module initialized

** ERROR **: Accessibility app error: exception during registry activation from
id: IDL:Bonobo/GeneralError:1.0

... and so on for many, many lines until, the final line:

aborting...

** ERROR **: Cannot find a safe socket path in '/tmp'
aborting...


After which, it returns to the GDM screen.  Looking in /tmp, the login has created 884 orbit-<username>-<rand> directories (but not filling / with them) which arn't removed.

Logging in with accessibility disabled works properly.