Comment 6 for bug 775542

Same here running quantal.

> hal.1: read hal dataprocess 12840: arguments to dbus_move_error() were incorrect, assertion "(dest) == NULL || !dbus_error_is_set ((dest))" failed in file ../../dbus/dbus-errors.c line 282.
This is normally a bug in some application using the D-Bus library.
libhal.c 3483 : Error unsubscribing to signals, error=The name org.freedesktop.Hal was not provided by any .service files

Installing hal package solve the problem.

A easy fix for developers could be add hal add dependency on hwinfo deb package. A better fix could be detect hal presence on hwinfo and don't call to dbus if hal is not present